Weather Guard Lightning Tech

HeliService USA: Efficient Offshore Wind Transportation
Allen and Joel speak with Michael Tosi, founder and CEO of HeliService USA, which is providing helicopter transportation for the offshore wind industry. HeliService USA provides efficient, safe, and environmentally-friendly transport for technicians and equipment to offshore wind farms, providing an advantage over marine vessels. With the highest safety standards, cost-effectiveness, and speed, HeliService is making offshore wind travel better.
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Allen Hall: Welcome to the Uptime Wind Energy Podcast. I’m your host, Allen Hall, along with my co host, Joel Saxum. As offshore wind continues to develop in the U. S., transportation of technicians and equipment is becoming a big issue for developers and operators to tackle. HeliService USA provides helicopter transportation and support services for the offshore wind industry in the U.
S. Based in Rhode Island, the company is utilizing the unique capabilities of helicopters to deliver personnel, cargo, and equipment. and conduct maintenance operations efficiently. Our guest is Michael Tosi, founder and CEO of HeliService USA. Michael is a helicopter pilot and also served in the U S air force.
Michael, welcome to the show.
Michael Tosi: Thank you, Allen. Really appreciate you having me today and look forward to chatting more.
Allen Hall: You’re in a really busy place right now because the pace of construction on U. S. offshore projects has really picked up. And you’re flying technicians back and forth. How many flights are you conducting right now a week?
Michael Tosi: So it, it varies. There’s two big scopes that we cover. So the first scope we cover is actually the construction of the wind farm. For the construction of the wind farm, we’re typically flying offshore workers who are going to be on vessels for, two, three, four, five, six weeks, depending on what their shift schedule is.
So that involves flying out to an installation vessel, a heavy lift vessel S. O. V. potentially, depositing those passengers we usually bring folks back to the other direction. And so those flights go on per vessel, sometimes once a week, twice a week, per vessel in the field. And now, of course, because they have several turbines up, more than several at this stage we’re also helping with operations and maintenance even prior to the wind farms being completed.
We are actually going to be commissioning flights as well. To certain turbines. I think that’s the first time at least that I’m familiar with that certainly has probably occurred in Europe. But at least from what our customers tell us that some of the first times they’ve used helicopters for commissioning were as well on the turbine.
It can be a bit cyclical on the demand, depending on when the vessels are here or not. But just for some numbers, I think it’s a good thing. We’ve been in operation for about a year and transported over 6, 000 people offshore during that time. To my knowledge, I think we transported certainly more than any other with just 16 folks offshore.
So it’s been a busy year.
Joel Saxum: Let me ask you a question, Michael. What does it look like for a technician that’s going to go Fly out to a turbine for work. Do they arrive at your facility with all their gear ready to go? And five minutes later, they’re in a helicopter or how, what does that look like?
Michael Tosi: It’s a pretty quick process. It’s a little bit different for the folks who go offshore to construction vessels. They’re they use helicopters, not necessarily less, but there’s less flights. So a technician may go out every single day of his hitch. So if he has a 14 day schedule, you may go offshore with the helicopter 14 times out 14 times back.
Plus sometimes intra field work, so turbine to turbine, or SOV to turbine, you name it. So they may do, in a 14 day span, they could do over 30 flights, over 40 flights, depending on how you look at it. So they get very accustomed to working with our crews. I don’t want to say they’re part of the crew, they’re not technically part of the crew, but a lot of rapport builds up between our hoist operators, our pilots, the technicians, because they’re working with them intimately every single day which is pretty neat.
So when they show up Especially for the folks who fly with us all the time, who’ve been breathed and are ready, they have to watch a briefing video, but really, they just throw on their harness do the briefing video, which is a legality at that point, because of course, they’ve seen that many times before, but by FAA regulation, they have to watch it, get that video, head out to the helicopter, and they’re airborne pretty quick, so from the start of their day to, on a turbine is an hour or mass.
You’re talking a second team, an hour and 20 minutes or less to get them offshore. So it is extraordinarily quick from the point where they take off to the turbine depending on the project for at least the ones we serve now is about 13 minutes. So it’s an astonishingly quick. Can you, and if you’re on the helicopter, that goes really fast.
Allen Hall: And the big question, obviously, between CTVs and helicopters that always comes up is emissions and emissions are a big topic in the wind industry at the moment. Are helicopters more efficient from an emission standpoint than ship transports?
Michael Tosi: Drastically it’s not one of those things in the margins.
It’s not single digit percentages. You’re talking to orders of magnitude. The easiest way to think about it is assume exactly the same fuel burn rate, which is not necessarily the case. But assuming the exact same fuel burn rate, you’re taking 8 to 10 times as longer to do the same exact transportation.
So even if we burn twice, which we don’t, depending on the CTV, my understanding is we burn the same or less per hour of operation. And that CTV is out there potentially 24 7, certainly 12 hours that it’s running. Whereas for us, 13 minutes out, 13 minutes back. At the end of the day you’re talking collectively that helicopter rarely is going to fly for more than a couple hours a day.
Certainly not 12 depending on the busyness. So overall drastically more efficient. We expect to see as they start getting worked into bids and proposals, having to account for your missions and your O& M means is that helicopters will start to see a massive step up.
Allen Hall: There are some other training besides throwing your harness on that has to happen.
So you can go offshore. You want to describe what some of that is?
Michael Tosi: Yeah, certainly. So one of the biggest concerns that we see from folks who aren’t familiar with helicopter operations, helicopter hoist operations, it looks pretty dramatic. And you think military, you think search and rescue, you think Coast Guard.
What they do and what I’ve done in the military and what I continue to do part time in the Air Guard as a search and rescue pilot is drastically different than this kind of hoisting. This is, I don’t want to say vanilla per se, but it’s intended to be repeatable. It’s intended to be done. One of our customers looked across their entire fleet.
All of their operators do 20, 000 plus waste a year without incident. So it’s designed to work incredibly well and incredibly safely. And it does have the highest safety record or none in terms of access means to a turbine. That includes SOVs, Amplements, and CTVs. And with that, though, it is not tremendously complex to train a technician.
Even if they’ve never seen a helicopter before, they require one day of underwater egress training. So that’s if lord forbid, a helicopter were ever to ditch, how to get out of it from being upside down, anyone who’s ever worked in the Gulf. It’s probably done that before. Some people love it, some people hate it.
I will say that. Generally, 80 percent of the class thinks it’s one of the coolest things they’ve done. 20 percent never want to see that thing ever again. It can break either way, depending on your familiarity and comfort in water. I really enjoy it. The only thing I don’t enjoy is my sinuses after being upside down in a pool all day.
So that’s about one day. Very easy class to get through. Again, there’s almost no attrition in that. The next thing you need is a one day hoist course. So you come to our facility you go through the hoist course. You spend about three to four hours in the classroom. Then you go out and we hoisted the aircraft in the hangar.
So on level ground, basically, without an airborne. We then go out to a nice open area. So like a little grassy field or a taxiway, you do our voice there about three per. And then we go to, we have a little mock turban. It sounds very fancy. It’s really a context container with a turban, a nacelle basket or a hoist basket welded onto it.
Pretty basic, but it does the job really. Accurately simulates the turbine and that’s another maybe four hours. So you’re talking two days to become a hoist trained and qualified technician, at least in terms of helicopter operations. It was very basic.
Allen Hall: I had the privilege of visiting your facility in Rhode Island and watching that training happen.
It is impressive. And the consistency of which you move people around and drop them on top of the simulated turbine top. That is amazing to see because it would just as an outsider, like I’ve never been dropped from a helicopter before, but it, as a technician, you would think, oh, I’m swinging around.
I’m doing all this crazy stuff. It’s not. It’s very controlled. It is. And it’s very consistent. I was amazed at the. Accuracy and the steadiness of it. We were there on a day that wasn’t the greatest day. It was sunny outside, but it was a little bit breezy and boy the amazing skills of the pilots to put technicians.
And move them around and put them on specific places was really incredible to watch. And I attribute that to a number of things. One of them, you mentioned your military background, your facilities and your aircraft are spotless and everything that technician sees. Spotless. Is that part of the military background that you’re bringing in, into your business?
Michael Tosi: It probably factors. We, I’ve always said I don’t trust getting into a helicopter unless it’s immaculately clean. Cause you can’t keep it clean and you can’t keep your facilities clean. How well are you, can you, I really trust that you’re maintaining that helicopter. It’s the easiest thing to do is keep something clean.
Certainly compared to complex maintenance. We think it’s really important for our customers. They do pay very good money for the service and we expect it, always to be a magnet, to be clean, to be very professional. Certainly appreciate the confident we try. It’s it’s always a never ending battle, especially with white helicopters, as you might imagine, to keep clean, but you certainly know when they’re clean.
In regards to the precision Yeah, there’s a couple of factors in that one is just the inherent nature of the work to we do have very skilled pilots. So many of them are former search and rescue pilots, former military or civilian pilots are all come from very diverse and impressive backgrounds of doing external load work.
So if you’ve ever seen that the folks that look like they’re dancing with the helicopter when they have those, barrels under it or firefighting those guys, so they can really place it if you, I think there’s the, I forget the exact name of it, that childhood game twister where you have to put your, your different limb on a different, different little circle.
Our crews should be able to in 40 plus not wins deposit someone exactly on one of those circles. It’s not hard to get within just a single foot. Like we can say, Hey, we’re gonna put that guy exactly there. We actually use remote hook operations so we can pick up cargo. without someone necessarily there to hook it up.
What that requires is the pilot and the hoist operator work really closely together to basically hit a spot about that big with a magnet that then latches the hook on and comes up. So that gives you an idea of the level of precision that they have to be able to do. It’s a bit like the crane game except you’re 35 feet in the air with 40 knot winds.
And, it’s all very stable, very consistent. That’s it. They’ve always to make it look as effortless as possible.
Allen Hall: What is the ratio roughly of cargo transport versus technician transport? Are you doing mostly trans transportation of technicians at the moment?
Michael Tosi: It’s that the two typically go together.
There’s a couple of things we can talk about in terms of logistic strategies. There’s been some developments in recent years that I think break towards making helicopters increasingly more usable. But typically we’re taking technicians and the cargo out. By using remote hook operations, we can actually go out and pre position cargo.
So we can go leave cargo at the top of certain missiles. To pre position it so that way when the folks go out to work via any means, they could even get out via CTV, and that saves them the up and down time in the turbine. A variety of strategies that have been looked at and developed recently, but I’d say it’s a 50 50 mix.
For every technician, there’s typically a bag.
Joel Saxum: At the end of the day here, what helicopters bring to the game, you’re doing it safely, you’re doing it with less emissions, but you’re bringing efficiency. To operations, right? Whether it’s during commissioning or during service operations or whatever it may be moving tools, moving kit, moving people, you’re doing it more efficiently, right?
So there’s an option here. So I’ve done some helicopter operations in the past. When I did helicopter operations, it was because there was no other option. Like you’re not going to get there unless you use a helicopter. In the offshore world, there is an option. You can use a CTV. You can be on an SOV, a walk to work with an Ampleman or a crew transfer with a CTV, up the ladder and whatnot.
However, what you guys are doing is we talked about earlier orders of magnitude, more efficient. Now, if I’m, if I have a technician going to work, would I rather be paying them for six to seven hours of the day to sit on their butt in a CTV or would I, and then get there and then be able to work for four to five hours?
Or do I want them in the helicopter out there and putting a 10 hour shift in on that piece of equipment. So the cost starts to really balance out just by the more efficiency of the personnel in the field. And another thing too, it’s like when we talk with 3S Lift. You’re not beating these technicians up all day long, right?
They’re getting to work, their brains are ready to go, they’re not tired, they haven’t been bouncing around in a CTV all day on the way out there. They’re, less basically tired. They’re able to focus on their job more because they’re there to do a job. They get there, boom, arrive at your site, get on the bird.
They’re out there real quick and able to get to work. So you guys are not only making, the technicians hours more workable but you’re driving efficiency for the whole operation.
Michael Tosi: Yeah. And I think increasingly as helicopters become more prevalent, I think the industry is starting to see this, particularly as they wrestle with costs with contracts is.
The inertia the preconceived notions that folks have, just because that’s what they’ve always done doesn’t necessarily work anymore, particularly in the U S with the Jones act, the price of vessels, folks have been forced to like elsewhere. And to your point, it is ultimately efficiency.
I’ve yet to see the business that can waste its labor for 50 percent of the day with its people. And continue to be effective. You just can’t do that. It’s, it’s an employer. I’m always looking for every way that I can use any employee. And also employees enjoy it more employees, at least good employees that you have on your team don’t enjoy downtime.
They enjoy working and they enjoy being productive. They enjoy being efficient. It’s just adds to a better quality of life. And your point, just not sitting on a vessel, hammering away. For four, four hours each direction, or even three you’re talking four hours time on turbine versus you go via helicopter to any relatively near shore wind farm.
I’m talking nine to ten hours minimum time on turbine per day, which is a substantial portion of the workday.
Joel Saxum: One of the things that we have in offshore projects, there are, it’s a lot different than onshore projects, whether it’s wind, oil and gas civil project, anything, is There’s items defined in the scope is critical path.
And when you talk critical path, it’s things that like, unless this milestone is hit, or unless this part is here on time, or unless this gets done on this day, everything else behind it gets extended, everything else starts to lose their, it’s foothold in the timeline of getting the project built. And a lot of these projects are based on milestones, right?
So whether it’s an investment decision, when you’re going to get money, when the PPA starts, all of these different things, these projects need to stay on. Online and on board. So you have other things in the construction process that are. Up and moving. So a specialized wind turbine installation vessel, that vessel cannot get held up.
If that vessel gets held up, they’re hundreds of thousands of dollars a day and just day rate, right? So as HeliService, as a big part of this now booming industry, When someone calls you, I’m imagining that you guys are just like, yeah, we provide rides. It’s more of you you have conversations to be a partner.
You get in, you look at the logistics. How can we optimize this thing? How does that work? When someone engages with you guys.
Michael Tosi: Online via LinkedIn, wherever else our team is always going to be available for these types of discussions. But to your point, it’s a lot more education. It’s being a partner with the customer very early on.
And. No different than vessels or any other part of the project. Helicopters aren’t Uber. You don’t just get to call them, 15 days before your project starts, and expect them to show up. They’re, very expensive. Anywhere from 12 to, low 20 millions of dollars. Per helicopter, depending on the size and the type, so it’s an expensive asset that’s finance over a long time, and it’s really important that gets integrated to a project early because there’s a lot of synergies throughout construction as you talked about O and M and also emergency rescue services, and you can use that helicopter for three.
If you really segmented and talk really quickly or speak really quickly before the project you lose a lot of the economies of scale that it costs more, and there may not be any availability. So what we like to do is speak with customers very early. Certainly more than two years out.
Hopefully, four to five years out as they’re looking at their entire logistics concept. And we’ll come in and get involved with them. We’ll do case studies where we take a look at it. Try and back up their data. It’s just to facilitate the discussion. We all know that a case study isn’t necessarily perfect.
There’s a lot of real world aspects to it, but we can talk about those with helicopters. A lot of folks in the industry almost always have green affairs or folks with vessel background in their on their teams. And a lot of them don’t necessarily have helicopter expertise on the team. And so there’s a lot of preconceived notions, be it about the safety, be it efficiency, be it lead time, the ability to call up and expect a service.
Most offshore wind has existed in an area with a built up offshore infrastructure. So in Northern Europe, where you had oil and natural gas work, you have a lot of operators. Here, there’s not just that excess capacity, and there won’t be for a long time. So folks need to have those conversations early.
And again, we like to sit there and look holistically at the project. We mentioned construction. Construction is the one where we see the least amount of debate. Almost all the tier one companies understand the need for helicopter operations. I haven’t spoken with a single one that would not prefer to use helicopters because for your, to your point, that asset is so enormous enormously expensive and also enormous size wise.
They, that goes down and it’s not just the vessel that costs the most. Four or five, six, 700, 000. It’s the entire operation, because it is all revolving around that one vessel. So if that vessel goes down, be it because the crane operator is sick, they need the 5 bolt. Gotten many of those phone calls.
Yeah, we need this now. I’ve learned about a couple professions I want to get into, because sometimes we’ll get a desperate call to get someone offshore. And they’re like, no, this is the only guy in the world who can do this. And I was like you mean the only guy in the world? I’m like, that guy sounds like he has great salary negotiating power.
Like, how do I sign up for that job?
Joel Saxum: To your point, I’ve been a part of oil and gas operations where they have to bring a tool or a part or a piece to a platform in the gulf 80 miles away. So this 100 piece now costs 10, 000 because it has to be there now. And if you were to put it on a vessel, you would keep that whatever it is, offshore drilling rig, offshore platform, you’d keep that thing on stall.
For a day. Now you’ve got a helicopter, you dispatch it out of OMA and it’s there, the parts there in a couple hours. So like the difference is amazing.
Michael Tosi: Or you just don’t have access for seven to 10 days. There’s, there was a stretch here where a couple of the jackups out there doing installation did not have the ability to get an SOV or a CTV out there for seven days straight.
And if you don’t have a helicopter to access that installation vessel the entire project, the installation vessel is. A couple hundred thousand a day, which is not a chump change, the entire operation, probably even worth the 5 million a day. And so at that point, helicopter, I was paid for itself in a single day.
I can anecdotally tell you points that every single major wind farm that we’ve worked on, which is the entire Northeast cluster, where we have single handedly paid for ourselves. It’s not hard anecdotally, let alone with the case study, but we obviously like to go through all of that start to finish.
Joel Saxum: And we’re talking, what about weather windows, right? So when you’re on a CTV there or an SOV, there’s always a wave height weather window. And I don’t know exactly what they are because they’re different for each vessel.
Michael Tosi: We, we can get out there right up to our limits our 45 knots depending on, we have some slightly different configurations, the helicopter 45, sometimes up to 60 with one of the helicopter configurations, obviously I’d get to meet the technician or The company that would like to be deployed in 60 knot winds.
However, we do frequently waste up to 40. I’ve been out there wasting technicians at 40 knot winds. And it’s again, on the pilot side, it’s a little bit of work, but that’s why we pay the pilots, the, the big bucks is to do that. Do it well and do it safely. And to answer your other question, I think this actually does hit on a key point.
I think this is a little, I don’t want to say it’s a source of friction, but for folks coming from the maritime world, they’re very used to looking at a schedule for seven days and they know. For better or worse, what that next seven days is going to look like now, the downside of it, particularly in the winter is you may not be able to go out for seven days we’ve seen on the projects in the Northeast.
I’ve seen frequent stretches of seven days or more where there hasn’t been a single S O V or CTV. This January and February, there was at least three, at least two, if not three stretches where they saw seven days with no CTV access or SUV access. And if you look at loss production and that’s where it really comes to the efficiency.
That’s where the numbers really make sense. As these turbines get bigger and bigger every hour, they’re down as an enormous amount of money. And then is it? It cascades, say you are planning a ton unscheduled per year, you got 60 turbines so you call it just to make the numbers a little easier, closer to 70.
You’re talking over the given day, you’re going to see somewhere between three to five on schedule down down turbines. Now multiply that over seven days, but in the end of seven days, you’re looking at 20 turbines that are down and not producing to the tune of Certainly six figures, but all my math suggests seven figures or more you’re losing per, yeah, per day.
Oh, it’s seven figures for sure.
Joel Saxum: Yeah, because I mean you’re looking at, okay, so if we’re, say we talk about a 10 megawatt turbine, if you’re saying it operated 24 hours at 150 an hour PPA, that’s 35, 000 ish per turbine per day.
Michael Tosi: Like you said, into the seven figures, you’re talking that in those three stretches of land here in the northeast, you could pay for, easily pay for a helicopter if not two without question.
And it’s the fact that there’s still projects that go in. And expressly say they’re not going to use helicopters for O& M is astonishing. And I don’t think that will last for long.
Joel Saxum: No. Cause if you’re talking a 30 knot sustained wind at sea, this wind flex, say some South Fork is it 35 miles offshore or so?
Michael Tosi: About it’s a little bit different from Rhode Island, Block Island, and the Vineyard. It’s equidistant, but approximately.
Joel Saxum: But when you get out that far in the ocean, you’re going to have, if you have sustained 30 knot winds, you’re going to have Fifteen to twenty foot waves? You’re not transferring on a CTV in that kind of wave height, like it, it’s just it’s unsafe.
So that’s, there’s going to be HS, safety limits on that. However, you guys could still be bringing people to work on the helicopters.
Michael Tosi: Yeah, but, and there’s also limits on SOVs. That’s another common fallacy is that SOVs are some sort of placebo. And I’m also not going to tell you helicopters run every single day of the year either.
But what you don’t see with helicopters is you almost never see, Combined stretches of more than a day without being able to fly. So you never get that cascading effect. Because for us, the only thing that really keeps us in the ground is essentially fog. Or lower cloud decks or some sort of, very significant convective activity that will keep us in the ground.
But I really don’t remember the last time that we had more than one day. And very often, it’s You know, there’s a morning you can’t fly, but for folks who are used to marine planning, I do sense that’s a little bit of, a little bit of friction there, a little consternation because they want to plan their week out before.
And with the helicopter, it could be very much like hour by hour. Now of course, what you look at, I’m sure it’s hour by hour, but you waited four hours to take off in the morning, but you still got more time in turban that had you taken the CTV. Early in the morning and your workers show up ready to work because they were able to relax for the morning and went out Really quickly.
So I think the benefits just far outweigh that and so overall accessibility rates for helicopters are well over 90 percent I’ve never seen an operator or operation where you don’t see 90 percent or greater Whereas CTV access rates in the winter 30 40 percent at best year round 60 70 even if it was 80, there’s still a substantial Delta.
Allen Hall: So I would imagine, Michael, that there’s standards for operating offshore, particularly around wind turbines versus something onshore, like helicopter delivery service, crop dusting, those kinds of things. There’s just a completely different thing. What are some of those standards that you have to meet in order to do this work?
Michael Tosi: It’s a great question. As with any industry working offshore particular but also any industry that’s Very often the regulatory standard is not sufficient for safe operations, and aviation is 100 percent that way. I could safely operate, offshore not safely, I could buy a regulatory standard.
I could take your local tour helicopter, like a very small 400, 000 helicopter powered by what sounds like a, a 65 Chevelle engine. Fire that thing up. With no floats, no life raft, no anything. Just give the guy all that’s required by regulation is that I give the passengers a little vest.
I can fly that offshore to a 300 million vessel that is completely permissible by the regulation. Needless to say, the industry cannot count on the regulations to ensure a safe operation. So a lot of the more sophisticated players have folks with an aviation background to help audit suppliers and all of the OEMs.
So bestest GE and SGRE, I’m a team that comes in audits. All of the offshore helicopter operators that are flying their personnel out to a wind service. That’s the first start. But what they audit to is a specific set of industry standards. So how the offshore. Has standards, wind recommended procedures, wind rep, and then also IOGP is not directly, it’s not directly translate, but it’s pretty close.
Those two are not very far off. And if operator is living up to IOGP standards, it’s it’s very easy to get up to the Helios for standards or vice versa. So either way you’re looking for an operator that flies to those standards and is audited by the team of OEMs, that’s the best way to do it.
And of companies in the world that meet that standard, it certainly takes less than two hands worth of fingers to list off those companies. So maybe a little over a half dozen around the world that can successfully do this. It’s a complex job. There’s an incredible safety record. I don’t like to say it because they don’t want to jinx it, but it sounds awful lot like zero in terms of fatalities.
The industry needs to keep that up. To continue to build faith in our access means and we as helicopter operators strive to do that every day. So it’s it’s critically important that operators be at, or sorry, tier ones and developers adhere to those standards.
Allen Hall: Oh, let’s touch on the safety aspect. And we have been talking on the podcast about. Offshore wind injuries, technicians getting hurt on site, particularly during the construction phase, we have a lot of big heavy equipment around big blades, tower sections, nacelles moving around and cranes people get hurt is their part of, or is there a standard or something for emergency services to fly people back and forth that may have been injured on the job?
Michael Tosi: No, unfortunately not. That’s That’s I want to say it’s short subjects for the industry, but it’s something the industry needs to look at very closely to my knowledge right now on the east coast. This is the only area in the developed world where there is offshore construction going at a substantial level.
Thousands of people offshore right now working where there is no commercial service, none. And the Gulf of Mexico has learned that the hard way. They learned that they needed to have a commercial service. They spend tens and tens of millions of dollars to run that commercial program in the Gulf.
To provide basically commercial search and rescue and EMS services for workers injured offshore. My team’s intimately acquainted with it. My director of ops and director of maintenance were very senior managers in that program as a chief pilot and SAR program manager. So they understand intimately why those exist, because they’ve done those calls.
They’ve seen those calls. And while the Coast Guard is a great backup, and it’s a wonderful organization, I have people who are alive because of the Coast Guard. Friends from my line of work in the military. Unfortunately, they’re not a commercial service, and they are not here to serve a specific industry.
And their ability to deliver high level medical care is non existent. They know it. They say it. I was at a G plus meeting and the Coast Guard District 1 rep says one covering the Northeast said that if you are counting on the Coast Guard as your primary means of medevac, you are setting yourself up for failure.
That is directly to the industry, spoken as clear as day. Fortunately, we’re starting to see some traction starting to see some discussion on it. So I think that message has been heard. And I think that will change very quickly here, which is exciting. But it is certainly something that the industry needs to take to heart.
Oil and natural gas, certainly understand is maybe I don’t want to say different core values, certainly from maybe political dispositions there’s a reticence to listen, it’s viewed as this sort of dirty oil and natural gas. Those folks knew how to do work offshore, they know how to do it extremely safely.
Yeah. There’s a lot of lessons to be learned about offshore health and safety from the oil and natural gas industry that they, they’re certainly not perfect but I would say they are, in fact, ahead of offshore wind by a substantial margin. I think the data backs that out.
Allen Hall: And Michael, you’ve chosen the Leonardo AW169 for your fleet, and the safety record of that aircraft is excellent. And what benefits does that helicopter bring to your service? And just by, just as a note. We did take a ride in the 169. That is a magnificent aircraft, by the way.
Michael Tosi: I appreciate it. No we’re I always joke, the helicopter industry is it’s a lot of fun to work in.
It’s not the best way to make money, selling software is probably a better way. It’s very capital intensive. It’s it’s a very high standard that you have to perform to. That you’re expected to because without saying aviation, you have every regulator imaginable there.
You have customers. It’s complex work. So very difficult business in general, but we do love, the fun part of the day is opening the hangar door and just looking at that, looking at the helicopters because they are certainly beautiful and extremely high performing.
And the reason that we go with the Leonardo AW169 specifically, it’s because of its hoist performance and its single engine safety margin. Just for everyone’s reference the safety margins built into this are absolutely incredible. This helicopter is able to, anytime we’re conducting a hoist with live human beings on the hoist, we’re able to have a single engine failure.
In the hover out of ground effect. I won’t go into advanced helicopter aerodynamics, but basically the higher up you go over a certain altitude, it starts to stay the same, but over about 50 to a hundred foot hover. It takes a lot more power than hovering about 10 feet off the ground. So it’s like the worst power state is you could be in.
If we have an engine failure out there at 380 feet, we can sit there for two and a half minutes and nothing changes. So you could be on the turbine, throw a wrench in the engine. Completely eats itself and the other engine will just fold it there for two and a half minutes and then you can clean up the hoist fly away just for reference cleaning up a hoist or terminating it to like quite quickly in a safe manner takes maybe five seconds.
So that two and a half minutes is an eternity. You can have an entire conversation. You could eat half a sandwich. That is a long time. So it’s an enormous amount of margin and then furthermore That margin allows me at all regimes of flight to be incredibly safe. So you always have a single engine performance to give you some reference, the military helicopters.
I fly, which are very impressive, very large, very powerful. I never have that power margin. I never had that performance. I can’t do that on the ground with no fuel. So even when I’m completely empty in the PAPOC helicopter and I’m hovering at 10 feet, by losing engine, we’re going to go right down on the ground.
So that’s the Delta in performance is pretty incredible. The 169 is really the only helicopter that has that level of power, and then it also enables us to do crew change because it has a nice big cabin with eight passengers. We can go off and also support construction during the same phase, whereas the H145 just similar, it’s over my head, I have time flying that aircraft, love the aircraft, it’s a really great aircraft, especially for EMS operations.
For offshore wind, it doesn’t allow us to do the diversity of mission stats or have the same power. Now, certain companies use it and in a certain circumstance, it can work, but the one six die is unquestionably the best civilian helicopter on the market for offshore wind without question.
Allen Hall: How many helicopters you have in service at the moment?
Michael Tosi: So right now we have three in active service supporting all of these projects they’re all pretty busy. Right now we have two separate bases. We have one on Martha’s vineyard to service the vineyard wind project. And then we also keep one, it wants it to serve as South Fork, Rev, Sunrise and Block Highlands.
Which was very excited to get pulled into that or under that umbrella because they were very excited to find out about that access meets which was, it was pretty cool. We got a very quick phone call from when they found out about it. So we’re excited to, to start working that hopefully relatively soon.
And then we keep our extra helicopter there at Quonset. So anytime we have to plus up for extra demand or we need to rotate one in for heavy maintenance, we can cycle that in.
Allen Hall: And what happens as the wind industry moves further south, like in Virginia, the offshore project there, and as we move all the way down to South Carolina, are there expansion plans?
Already in place?
Michael Tosi: For us. Absolutely. I say there isn’t a substantial project. There’s a lot so I can’t say 100%, but I’m pretty sure we’ve talked to or been involved in some fairly detailed discussions for nearly all of them. And I think. Particularly in the U. S. There is more of an aviation culture.
Europe, there’s not a general aviation culture. It’s not in the blood. If you like, obviously, people are certainly open to it there. But in the U. S. People are very receptive. It’s just part of sort of normal business in the U. S. And so I think there’s a lot more. Open mindedness.
Also, some of the all the factors we talked about, Europe grew up a smaller winter, but it’s close to shore for the U. S. It’s right in the deep end. On the intended. I don’t know. For me, maybe when they get to the West Coast and floating window will be a little more in the deep end.
But either way I think people are very open to it. And we’ve talked to nearly every project. So I wouldn’t very much expect to see helicopters and hopefully continually HeliService USA helicopters moving further south.
Allen Hall: How do companies needing to transport technicians get a hold of you?
Michael Tosi: Yeah, our website, or certainly reach out directly to you folks or anyone else. We hopefully have enough contact for our website to get a hold of us. And Very responsive sales and business development team that certainly hungry to continue growing. We’re we very much enjoy our current operation and love the area.
It’s a wonderful place to be based up here in new England. We’re certainly here to continue to grow and hopefully serve the industry for a long time to come.
Allen Hall: Michael, thank you so much for being in the podcast and thank you for allowing us to visit your facilities. They are immaculate.
Michael Tosi: Very much appreciate it.
You guys are always welcome. I know you’re pretty close neighbors up here in New England. Hopefully we’ll see you again soon.
https://weatherguardwind.com/heliservice-usa-offshore-transportation/
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Morten Handberg Breaks Down Leading Edge Erosion
Weather Guard Lightning Tech

Morten Handberg Breaks Down Leading Edge Erosion
Morten Handberg, Uptime’s blade whisperer, returns to the show to tackle leading edge erosion. He covers the fatigue physics behind rain erosion, why OEMs offer no warranty coverage for it, how operators should time repairs before costs multiply, and what LEP solutions are working in the field.
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Welcome to Uptime Spotlight, shining Light on Wind. Energy’s brightest innovators. This is the Progress Powering Tomorrow.
Allen Hall: Morten, welcome back to the program.
Morten Handberg: Thanks, Allen. It’s fantastic to be back on on, on the podcast. Really excited to, uh, record an episode on Erosion Today.
Allen Hall: Wow. Leading as erosion is such a huge worldwide issue and. Operators are having big problems with it right now. It does seem like there’s not a lot of information readily available to operators to understand the issue quite yet.
Morten Handberg: Well, it, I mean, it’s something that we’ve been looking at for the, at least the past 10 years. We started looking at it when I was in in DONG or as it back in 2014. But we also saw it very early on because we were in offshore environment, much harsher. Uh, rain erosion conditions, and you were also starting to change the way that the, the, uh, the coatings [00:01:00]that were applied.
So there was sort of a, there was several things at play that meant that we saw very early on, early on offshore.
Allen Hall: Well, let’s get to the basics of rain erosion and leading edge erosion. What is the physics behind it? What, what happens to the leading edges of these blades as rain? Impacts them.
Morten Handberg: Well, you should see it as um, millions of, of small fat, uh, small fatigue loads on the coating because each raindrop, it creates a small impact load on the blade.
It creates a rail wave that sort of creates a. Uh, share, share loads out on, uh, into the coating that is then absorbed by the coating, by the filler and and so on. And the more absorbent that your substrate is, the longer survivability you, you’re leading into coating will have, uh, if you have manufacturing defects in the coating, that will accelerate the erosion.
But it is a fatigue effect that is then accelerated or decelerate depending on, uh, local blade conditions.
Allen Hall: Yeah, what I’ve seen in the [00:02:00] field is the blades look great. Nothing. Nothing. You don’t see anything happening and then all of a sudden it’s like instantaneous, like a fatigue failure.
Morten Handberg: I mean, a lot of things is going on.
Uh, actually you start out by, uh, by having it’s, they call, it’s called mass loss and it’s actually where the erosion is starting to change the material characteristics of the coating. And that is just the first step. So you don’t see that. You can measure it in a, um, in the laboratory setting, you can actually see that there is a changing in, in the coating condition.
You just can’t see it yet. Then you start to get pitting, and that is these very, very, very small, almost microscopic chippings of the coating. They will then accelerate and then you start to actually see the first sign, which is like a slight, a braided surface. It’s like someone took a, a fine grain sandpaper across the surface of the plate, but you only see it on the leading edge.
If it’s erosion, it’s only on the center of the leading edge. That’s very important. If you see it on the sides and further down, then it’s, it’s [00:03:00] something else. Uh, it’s not pure erosion, but then you see this fine grain. Then as that progresses, you see more and more and more chipping, more and more degradation across the, the leading edge of the blade.
Worse in the tip of it, less so into the inner third of the blade, but it is a gradual process that you see over the leading edge. Finally, you’ll then start to see the, uh, the coating coming off and you’ll start to see exposed laminate. Um, and from there it can, it can accelerate or exposed filler or laminate.
From there, it can accelerate because. Neither of those are actually designed to handle any kind of erosion.
Allen Hall: What are the critical variables in relation to leading edge erosion? Which variables seem to matter most? Is it raindrop size? Is it tip speed? What factors should we be looking for?
Morten Handberg: Tip speeds and rain intensity.
Uh, obviously droplet size have an impact, but. But what is an operator you can actually see and monitor for is, well, you know, your tip speed of the blade that matters. Uh, but it is really the rain intensity. So if you have [00:04:00] sort of a, an average drizzle over the year, that’s a much better condition than if you have like, you know, showers in, in, in, in a, in a few hour sessions at certain points of time.
Because then, then it becomes an aggressive erosion. It’s not, it’s, you don’t, you get much higher up on the. On the, on the fatigue curve, uh, then if it’s just an average baseline load over long periods of time,
Allen Hall: yeah, that fatigue curve really does matter. And today we’re looking at what generally is called VN curves, velocity versus number of impacts, and.
The rain erosion facilities I’ve seen, I’ve been able to, to give some parameters to, uh, provide a baseline or a comparison between different kinds of coatings. Is is that the, the standard as everybody sees it today, the sort of the VN curve
Morten Handberg: that is what’s been developed by this scientific, uh, community, these VN curve, that that gives you some level of measure.
I would still say, you know, from what we can do in a rain erosion tester to what is then actually going on [00:05:00] the field is still very two very, very, very different things you can say. If you can survive a thousand hours in a rain erosion tester, then it’s the similar in the field that doesn’t really work like that.
But there are comparisons so you can do, you know, uh, a relationship study, uh, between them. And you can use the VN curves to determine the ERO erosion aggressiveness. Field. We did that in the bait defect forecasting that we did in wind pile up with DCU back in 2019, uh, where we actually looked at rain erosion across Europe.
Uh, and then the, uh, the actual erosion propagation that we saw within these different sites, both for offshore and for onshore, where we actually mapped out, um, across Europe, you know, which areas will be the most erosion prone. And then utilize that to, to then mo then, then to determine what would be the red, the best maintenance strategy and also, uh, erosion, uh, LEP, uh, solution for that wind farm.
Allen Hall: Oh, okay. Uh, is it raindrop size then, or just [00:06:00] quantity of raindrops? Obviously drizzle has smaller impact. There’s less mass there, but larger raindrops, more frequent rain.
Morten Handberg: If you have showers, it tends to be larger drops. Right. So, so they kind of follow each other. And if it’s more of a drizzle. It will be smaller raindrops.
They typically follow each other. You know, if you’ve been outside in a rainstorm before we just showered, you would have sense that these are, these are much higher, you know, raindrop sizes. So, so there is typically an a relation between raindrop size and then showers versus a drizzle. It’s typically more fine, fine grain rain drops.
Allen Hall: And what impact does dirt and debris mixed in with the rain, uh, affect leading edge erosion? I know a lot of, there’s a lot of concern. And farm fields and places where there’s a lot of plowing and turnover of the dirt that it, it, it does seem like there’s more leading edge erosion and I, I think there’s a little bit of an unknown about it, uh, just because they see leading edge [00:07:00]erosion close to these areas where there’s a lot of tilling going on.
Is it just dirt impact worth a blade or is it a combination of dirt plus rain and, and those two come combining together to make a worse case. Uh, damage scenario.
Morten Handberg: Technically it would be slightly worse than if it were, if there is some soil or, or sand, or sand contamination in the raindrops. But I mean, logically rain typically, you know, comes down from the sky.
It doesn’t, you know, it doesn’t mix in with the dirt then, you know, it would be more if you have dirt on the blades. It’s typically during a dry season where it would get mixed up and then blown onto the blades. Honestly, I don’t think that that is really what’s having an impact, because having contamination in the blade is not something that is, that would drive erosion.
I think that that is, I think that is, that is a misunderstanding. We do see sand, sand erosion in some part of the world where you have massive, uh, sand, uh, how do you say, sandstorms [00:08:00] coming through and, and that actually creates an, an abrasive wear on the plate. It looks different from rain erosion because it’s two different mechanisms.
Uh, where the sand is actually like a sandpaper just blowing across the surface, so you can see that. Whereas rain is more of this fatigue effect. So I think in the, theoretically if you had soil mixed in with rain, yes that could have an impact because you would have an a, a hardened particle. But I do, I don’t think it’s what’s driving erosion, to be honest.
Allen Hall: Okay, so then there’s really two different kinds of failure modes. A particle erosion, which is more of an abrasive erosion, which I would assume be a maybe a little wider, spread along the leading edge of the blade versus a fatigue impact from a raindrop collision. They just look different, right?
Morten Handberg: Yeah, so, so sand erosion you could have spreading across a larger surface of the blade because it, because it doesn’t bounce off in the same way that a raindrop would, you know, because that’s more of an impact angle and the load that it’s applying.
So if it comes in at a, at a st [00:09:00] at a, um, at the, at the, at a, at a steep angle, then it would just bounce off because the amount of load that it’s impacting on would be very limited. So that’s also why we don’t really see it on the, um, uh, outside of the leading edge. Whereas sand erosion would have a, would, would have a different effect because even at a steep angle, it would still, you know, create some kind of wear because of the hardened particle and the effect of that.
Allen Hall: Okay. So let’s talk about incubation period, because I’ve seen a lot of literature. Talking about incubation period and, and what that means. What does incubation period mean on a leading edge coating?
Morten Handberg: So that is, that, that is from when you start having the first impacts until you get the, the, the change in structure.
So when you get to the mass loss or first pitting, that would be your incubation period, because that is from when it starts until you can see the actual effects. Would say that, that that is what would be defined as the incubation period of leading into erosion.
Allen Hall: Okay. So you wanna then maximize the incubation period where the coating still looks mostly pristine [00:10:00] once incubation period is over and you get into the coating.
Are there different rates at which the coatings will deteriorate, or are they all pretty much deteriorating at roughly the same rate?
Morten Handberg: I mean, for the really high durability. We don’t really have good enough data to say anything about whether the, um, the, the period after the incubation period, whether that would actually, how that would work in the field.
We don’t really know that yet. I would say, because the, um, some of the, the shell solutions, some of the high end polyurethane coatings, if they fail, typically it’s because of workmanship. Or adhesion issues. It’s has so far not really been tied in directly in, into leading edge erosion. Uh, the ones that I’ve seen, so typically, and, and, you know, all of these high-end coatings, they’re just, they, they have shown, you know, some of them you couldn’t even wear down in a rain erosion tester.
Um, so, so we don’t really know. Um, how, [00:11:00] how the, how the shells, they would, they, they, they, they, how they would react over the five, 10 year period because we haven’t seen that much yet. And what we have seen have been more of a mechanical failure in, in the bonding
Allen Hall: that, I guess that makes sense. Then operators are still buying wind turbine blades without any leading edge coating at all.
It is basically a painted piece of fiberglass structure. Is that still advisable today or are there places where you could just get away with that? Or is that just not reality because of the tip speeds?
Morten Handberg: For the larger, I would say anything beyond two megawatt turbines, you should have leading edge protection because you’re at tip speeds where, you know, any kind of rain would create erosion within, um, within the lifetime of the late.
That is just a fact. Um, so. I don’t, I don’t see any real areas of the world where that would not apply. And if it, if you are in a place where it’s really dry, then it would typically also mean that then you would have sand erosion. Is that, that, [00:12:00] that would, I would expect that it would be one of the two.
You wouldn’t be in an area where it couldn’t get any kind of erosion to the blades. Um, so either you should have either a very tough gel code, um, coating, or you should have have an LEP per urethane based coating. On the blades,
Allen Hall: well do the manufacturers provide data on the leading edge offerings, on the coatings, or even the harder plastic shells or shields.
Does, is there any information? If I’m an operator and I’m buying a a three megawatt turbine that comes along with the blade that says, this is the li, this is the estimated lifetime, is that a thing right now? Or is it just We’re putting on a coating and we are hoping for the best?
Morten Handberg: The OEMs, as far as I, I haven’t seen any.
Any contract or agreement where today, where erosion is not considered a wear and tear issue, there is simply no, no coverage for it. So if you buy a turbine and there’s any kind of leading [00:13:00] edge erosion outside of the end of warranty period, it’s your your problem. There is no guarantee on that.
Allen Hall: So the operator is at risk,
Morten Handberg: well, they’re at risk and if they don’t take matters into their own hands and make decisions on their own.
But they would still be locked in because within the warranty period, they will still be tied to the OEM and the decisions that they make. And if they have a service agreement with the OEM, then they would also be tied in with what the OEM provides.
Allen Hall: So that does place a lot of the burden on the owner operator to understand the effects of rate erosion, particularly at the at a new site if they don’t have any history on it at all.
To then try to identify a, a coating or some sort of protecting device to prevent leading edge erosion. ’cause at the end of the day, it does sound like the operator owner is gonna be responsible for fixing it and keeping the blades, uh, in some aerodynamic shape. That that’s, that’s a big hurdle for a lot of operators.
Morten Handberg: The problem is that if you have a service [00:14:00]contract, but you are depending on the OEM, providing that service. Then you have to be really certain that any leading edge erosion or anywhere on the leading edge is then covered by that contract. Otherwise, you’re in, you’re in a really bad, you’re in a really risky situation because you can’t do anything on your own.
Because if you’re a service contract, but you’re beholden to whatever the, your service provider is, is, is agreeing to providing to you. So you might not get the best service.
Allen Hall: And what are the risks of this? Uh, obviously there can be some structural issues. Particularly around the tips of the blaze, but that’s also power loss.
What are typical power loss numbers?
Morten Handberg: Well, there is a theoretically theoretical power loss to it, but for any modern turbine, the blade, the, the turbine would simply regulate itself out of any leading erosion loss. So, so the blades would just change their behavior that the turbine would just change, its its operation [00:15:00]conditions so that it would achieve the same lift to the blade.
So. Uh, any study that we have done or been a part of, uh, even, you know, comparing blades that were repaired, blades that were cleaned, blades that were, uh, left eroded, and then operating the, uh, the deviation was within half, half percent and that was within the margin of error. We couldn’t read, we couldn’t see it even for really, you know, really er road blades.
Of course there is different between turbines. Some turbines, they, they could show it, but I haven’t seen any data that suggests that erosion actually leads to a lot of power loss. There is a theoretical loss because there is a loss in aerodynamic performance, but because blades today they’re pitch controlled, then you can, you can regulate yourself out of that.
Some of that, uh, power laws,
Allen Hall: so the control laws in the turbine. Would know what the wind speeds are and what their power output should be, and it’ll adjust the [00:16:00]pitch of each of the blades sort of independently to, to drive the power output.
Morten Handberg: Typically, erosion is a uniform issue, so what happens on one blade happens on three.
So it’s rare to see that one blade is just completely erod in the two other they look fine. That’s really rare unless you start, you know, doing uh, abnormal repairs on them. Then you might get something. But even then, I mean, we’re not talking, you know, 10 per 10 degrees in, in variation. You know, it’s not, it’s not anything like that.
It’s very small changes. And if they would do a lot of weird DA, you know, uh, different angles, you would get instant imbalance and then, you know, you would get scatter alarm. So, so you would see that quite fast.
Allen Hall: Well, let me, let me just understand this just a little bit. So what the control logs would do would increase the pitch angle of the blaze, be a little more aggressive.
On power production to bring the power production up. If leading edge erosion was knocking it down a percentage point or two, does that have a consequence? Are like when you [00:17:00] start pitching the blades at slightly different angles, does that increase the area where rain erosion will occur? Is like, are you just.
Keep chasing this dragon by doing that,
Morten Handberg: you could change the area a little bit, but it’s not, it’s not something that, that changes the erosion, uh, that the erosion zone, that that much. It’s very minimal. Um, and one, one of the, another, another reason why, why you might see it might, might not see it as much is because voltage generator panels is widely used in the industry today.
And, and Vortex panel, they are. Uh, negating some of the negative effect from, uh, leading erosion. So that also adds to the effect that there, that the aerodynamic effect of leading erosion is limited, uh, compared to what we’ve seen in the past.
Allen Hall: Okay. So there’s a couple manufacturers that do use vortex generators around the tip, around the leading edge erosion areas right outta the factory, and then there’s other OEMs that don’t do that at all.
Is, is there a benefit to [00:18:00] having the VGs. Right out of the factory. Is that, is that just to, uh, as you think about the power output of the generator over time, like, this is gonna gimme a longer time before I have to do anything. Is, is in terms of repair,
Morten Handberg: it does help you if you have contamination of the blade.
It does help you if you have surface defects off the blade. That, that any, uh, any change to the air, to the aerodynamics is, is reduced and that’s really important if you have an optimized blade. Then the negative effect of leading erosion might get, uh, you know, might, might, might get, might get affected.
But there are, there are still reasons why I do want to do leading erosion repairs. You should do that anyway, even if you can’t see it on your power curve or not, because if you wait too long, you’ll start to get structural damages to the blade. As we talked about last time. It’s not that leading edge erosion will turn into a critical damage right away, but if you need, if you go into structural erosion, then the, then the cost of damage.
The cost of repairing the damage will multiply. Uh, [00:19:00] and at, at a certain point, you know, you will get a re structure. It might not make the blade, you know, uh, cost a, a condition where the blade could collapse or you’re at risk, but you do get a weakened blade that is then susceptible to damage from other sources.
Like if you have a lighting strike damage or you have a heavy storm or something like that, then that can accelerate the damage, turning it into a critical damage. So you should still keep your leading edge in, in shape. If you want to do to, to minimize your cost, you should still repair it before it becomes structural.
Allen Hall: Okay. So the blades I have seen where they actually have holes in the leading edge, that’s a big problem just because of contamination and water ingress and yeah, lightning obviously be another one. So that should be repaired immediately. Is is that the, do we treat it like a cat four or cat five when that happens?
Or how, what? How are we thinking about that?
Morten Handberg: Maximum cat, cat four, even, even in those circumstances because it is a, it is a severe issue, but it’s not critical on, on its own. So I would not treat it as a cat five where you need to stop [00:20:00] the turbine, stuff like that. Of course, you do want, you don’t want to say, okay, let’s wait on, let’s wait for a year or so before we repair it.
You know, do plan, you know, with some urgency to get it fixed, but it’s not something where you need to, you know, stubble works and then get that done. You know, the blade can survive it for, for a period of time, but you’re just. Susceptible to other risks, I would say.
Allen Hall: Alright. So in in today’s world, there’s a lot of options, uh, to select from in terms of leading edge protection.
What are some of the leading candidates? What, what are some of the things that are actually working out in the field?
Morten Handberg: What we typically do, uh, when we’re looking at leading edge erosion, we’re looking at the, the raw data from the wind farm. Seeing how, how bad is it and how long have the wind farm been operated without being repaired?
So we get a sense of the aggressiveness of the erosion and. Um, if we have reliable weather data, we can also do some modeling to see, okay, what is the, what is the, the, uh, environmental conditions? Also, just to get a sense, is this [00:21:00] material driven fatigue or is it actually rain erosion driven fatigue?
Because if the, if the coating quality was not, was not very good, if the former lead leading edge, it was not applied very, very, very good, then, you know, you still get erosion really fast. You get surface defects that, uh, that trigger erosion. So that’s very important to, to, to have a look at. But then when we’ve established that, then we look at, okay, where do we have the, the, the, uh, the structural erosion zone?
So that means in what, in what part of the BA would you be at risk of getting structural damage? That’s the part where that you want to protect at all costs. And in that, I would look at either shell solution or high duty, um, put urethane coating something that has a a long durability. But then you also need to look at, depending on whether you want to go for coating or shell, you need to look at what is your environmental condition, what is your, you know, yeah.
Your environmental conditions, because you also wanna apply it without it falling off again. Uh, and if you have issues with [00:22:00] high humidity, high temperatures, uh, then a lot of the coatings will be really difficult to process or, you know, to, to. Uh, to handle in the field. And, you know, and if you don’t, if you don’t get that right, then you just might end up with a lot of peeling coating or uh, peeling shells.
Um, so it’s very important to understand what is your environmental conditions that you’re trying to do repairs in. And that’s also why we try not to recommend, uh, these shell repairs over the entire, out a third of the blade. Because you’re, you’re just putting up a lot of risk for, for, uh, for detaching blades if you put on too high, um, uh, how do you say, high height, sea of solutions.
Allen Hall: Yeah. So I, I guess it does matter how much of the blade you’re gonna cover. Is there a general rule of thumb? Like are we covering the outer 10%, outer 20%? What is the. What is that rule of thumb?
Morten Handberg: Typically, you know, you, you get a long way by somewhere between the outer four to six meters. Um, so that would [00:23:00]probably equivalate to the, out of the outer third.
That would likely be something between the outer 10 to 15 to 20% at max. Um, but, but it is, I, I mean, instead of looking at a percentage, I usually look at, okay, what can we see from the data? What does that tell us? And we can see that from the progression of the erosion. Because you can clearly see if you have turbines that’s been operating, what part of the blade has already, you know, exposed laminate.
And where do you only have a light abrasion where you only have a light abrasion, you can just continue with, and with the, with, with the general coating, you don’t need to go for any high tier solutions. And that’s also just to avoid applying, applying something that is difficult to process because it will just end up, that it falls off and then you’re worse off than, than before actually.
Allen Hall: Right. It’s about mitigating risk at some level. On a repair,
Morten Handberg: reducing repair cost. Um, so, so if you, if you look at your, your conditions of your blades and then select a solution that is, that is right for that part of [00:24:00] the blade
Allen Hall: is the best way to repair a blade up tower or down tower is what is the easiest, I guess what’s easier, I know I’ve heard conflicting reports about it.
A lot of people today, operators today are saying we can do it up tower. It’s, it’s pretty good that way. Then I hear other operators say, no, no, no, no, no. The quality is much better if the blade is down on the ground. What’s the recommendation there?
Morten Handberg: In general, it can be done up tower. Um, it is correct if you do a down tower, the quality is better, but that, that, that means you need to have a crane on standby to swap out blades.
Uh, and you should have a spare set of blades that you can swap with. Maybe that can work. Um. But I would say in general, the, your, your, your, your cheaper solution and your more, you know, you know, uh, would be to do up tower. And if, and again, if you do your, your, your homework right and, and selecting the right, uh, products for, for your [00:25:00] local environments, then you can do up tower then leading it, erosion.
Not something that you need to, you should not need to consider during a down tower. Unless you are offshore in an environment where you only have, uh, 10 repair days per year, then you might want to look at something else. But again, if we talk for offs for onshore, I would, I would always go for up, up tower.
I, I don’t, I don’t really see the need for, for, for taking the blades down.
Allen Hall: So what is the optimum point in a blaze life where a leading edge coating should be applied? Like, do you let it get to the point where you’re doing structural repairs or. When you start to see that first little bit of chipping, do you start taking care of it then there I, there’s gotta be a sweet spot somewhere in the middle there.
Where is that?
Morten Handberg: There is sweet spot. So the sweet spot is as soon as you have exposed laminate, because from exposed laminate, uh, the repair cost is exactly the same as if it was just, you know, uh, a light abrasion of the coating because the, the, the time to, to, um, prepare the [00:26:00] surface to apply the coating is exactly the same.
From, you know, from, from, from light surface damage to exposed laminate. That is the same, that is the same repair cost. But as soon as you have a structural damage to your blade, then you have to do a structural repair first, and then you’re, you’re multiplying the repair time and your repair cost. So that is the right point in time.
The way to, to determine when that is, is to do inspections, annual inspections, if you do 10% of your wind farm per year. Then you would know why, what, how the rest of your wind farm looks like because erosion is very uniform across the wind farm. Maybe there are some small deviations, but if you do a subset, uh, then, then you would have a good basic understanding about what erosion is.
You don’t need to do a full sweep of the, of the wind farm to know, okay, now is my right time to do repairs.
Allen Hall: Okay, so you’re gonna have a, a couple years notice then if you’re doing drone inspections. Hopefully you put, as you put your blades up, doing a drone inspection maybe on the ground so you [00:27:00] have a idea of what you have, and then year one, year two, year three, you’re tracking that progression across at least a sampling of the wind farm.
And then, then you can almost project out then like year five, I need to be doing something and I need to be putting it into my budget.
Morten Handberg: When you start to see the first minor areas of exposed laminate. Then the year after, typically then you would have a larger swat of, of laminated exposure, still not as structural.
So when you start to see that, then I would say, okay, next year for next year’s budget, we should really do repairs. It’s difficult when you just direct the wind farm, maybe have the first year of inspection. It’s difficult to get any, any kind of, you know, real sense of what is the, you know, what is the where of scale that we have.
You can be off by a factor of two or three if, you know, if, um, so I would, I would give it a few years and then, uh, then, then, then see how things progresses before starting to make, uh, plans for repairs. If you [00:28:00] don’t have any leading edge erosion protection installed from the start. I would say plan, at least for year, year five, you should expect that you need to go out, do and do a repair.
Again, I don’t have a crystal ball for every, you know, that’s good enough to predict for every wind farm in the world, but that would be a good starting point. Maybe it’s year three, maybe it’s year seven, depending on your local conditions. That is, but then at least you know that you need to do something.
Allen Hall: Well, there’s been a number of robotic, uh, applications of rain erosion coatings. Over the last two, three years. So now you see several different, uh, repair companies offering that. What does the robotic approach have to its advantage versus technicians on ropes?
Morten Handberg: Obviously robots, they don’t, they don’t, uh, get affected by how good the morning coffee was, what the latest conversation with the wife was, or how many hours of sleep it got.
There is something to, with the grown operator, uh, you know how good they are. But it’s more about how well, uh, [00:29:00] adjusted the, the controls of the, of the, the robot or the drone is in its application. So in principle, the drone should be a lot better, uh, because you can, it will do it the right, the same way every single time.
What it should at least. So in, so in principle, if you, you, you, when we get there, then the leading it then, then the robot should be, should outmatch any repair technician in, in the world. Because repair technician, they’re really good. They’re exceptionally good at what they do. The, the, the far majority of them, but they’re, they’re still people.
So they, you know, anyone, you know, maybe standing is not a hundred percent each time, maybe mixing of. Um, of materials and they’re much better at it than I am. So no question there. But again, that’s just real reality. So I would say that the, the, the draw, the robots, they should, uh, they should get to a point at some, at some point to that they will, they will be the preferable choice, especially for this kind of, this kind of repair.
Allen Hall: What should [00:30:00] operators be budgeting to apply a coating? Say they’re, you know, they got a new wind farm. It’s just getting started. They’re gonna be five years out before they’re gonna do something, but they, they probably need to start budgeting it now and, and have a scope on it. ’cause it’s gonna be a capital campaign probably.
How much per turbine should they be setting aside?
Morten Handberg: I would just, as a baseline, at least set aside 20,000 per per blade
Allen Hall: dollars or a Corona
Morten Handberg: dollars.
Allen Hall: Really. Okay.
Morten Handberg: Assuming that you actually need to do a repair campaign, I would say you’re probably ending up in that region again. I can be wrong with by a factor of, you know, uh, by several factors.
Uh, but, um, but I would say that as a starting point, we don’t know anything else. I would just say, okay, this should be the, the, the, the budget I would go for, maybe it’ll be only 10 because we have a lesser campaign. Maybe it will be twice because we have severe damages. So we need just to, to, to source a, um, a high end, uh, LEP solution.
Um, so, so [00:31:00] again, that would just be my starting point, Alan. It’s not something that I can say with accuracy that will go for every single plate, but it would be a good starting point.
Allen Hall: Well, you need to have a number and you need to be, get in the budget ahead of time. And so it, it’s a lot easier to do upfront than waiting till the last minute always.
Uh, and it is the future of leading edge erosion and protection products. Is it changing? Do you see, uh, the industry? Winning this battle against erosion.
Morten Handberg: I see it winning it because we do have the technology, we do have the solutions. So I would say it’s compared to when we started looking at it in 14, where, you know, we had a lot of erosion issues, it seems a lot more manageable.
Now, of course, if you’re a, if you’re a new owner, you just bought a wind farm and you’re seeing this for this first time, it might not be as manageable. But as an, as an industry, I would say we’re quite far. In understanding erosion, what, how it develops and what kind of solutions that that can actually, uh, withstand it.
We’re still not there in [00:32:00] terms of, uh, quality in, in repairs, but that’s, um, but, but, uh, I, I think technology wise, we are, we are in a really good, good place.
Allen Hall: All the work that has been done by DTU and RD test systems for creating a rain erosion test. Facility and there’s several of those, more than a dozen spread around the world at this point.
Those are really making a huge impact on how quickly the problem is being solved. Right? Because you’re just bringing together the, the, the brain power of the industry to work on this problem.
Morten Handberg: They have the annual erosion Symposium and that has been really a driving force and also really put DTU on the map in terms of, uh, leading edge erosion, understanding that, and they’re also trying to tie, tie it in with lightning, uh, because, uh.
If you have a ro, if you have erosion, that changes your aerodynamics. That in fact changes how your LPS system works. So, so there is also some, some risks in that, uh, that is worth considering when, when, when discussing [00:33:00]repairs. But I think these of you, they’ve done a tremendous amount of work and r and d system have done a lot of good work in terms of standardizing the way that we do rain erosion testing, whether or not we can then say with a hundred uncertainty that this, uh, this test will then match with.
With, um, how say local environment conditions, that’s fine, but we can at least test a DP systems on, on the same scale and then use that to, to, to look at, well how, how good would they then ferry in in the, um, out out in the real world.
Allen Hall: Yeah, there’s a lot too leading edge erosion and there’s more to come and everybody needs to be paying attention to it.
’cause it, it is gonna be a cost during the lifetime of your wind turbines and you just need to be prepared for it. Mor how do people get ahold of you to learn more about leading edge erosion and, and some of the approaches to, to control it?
Morten Handberg: Well, you can always re reach me, uh, on my email, meh, at wind power.com or on my LinkedIn, uh, page and I would strongly advise, you know, reach out if you have any concerns regarding erosion or you need support with, um, [00:34:00] uh, with blade maintenance strategies, uh, we can definitely help you out with that.
Or any blade related topic that you might be concerned about for your old local wind farm.
Allen Hall: Yes. If you have any blade questions or leading edge erosion questions, reach out to Morton. He’s easy to get ahold of. Thank you so much for being back on the podcast. We love having you. It
Morten Handberg: was fantastic being here.
Cheers. A.
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