Published

11 months ago

May 23, 2025

Alice Rush

Weather Guard Lightning Tech

Peel Ply Elimination in Carbon Pultrusion Tech

Avient and Tight Line Composites have developed a carbon pultrusion technology without the need for peel ply. This method improves bond strength by 8%, cuts waste, reduces labor costs, and simplifies manufacturing.

Sign up now for Uptime Tech News, our weekly email update on all things wind technology. This episode is sponsored by Weather Guard Lightning Tech. Learn more about Weather Guard’s StrikeTape Wind Turbine LPS retrofit. Follow the show on Facebook, YouTube, Twitter, Linkedin and visit Weather Guard on the web. And subscribe to Rosemary Barnes’ YouTube channel here. Have a question we can answer on the show? Email us!

Welcome to Uptime Spotlight, shining Light on Wind. Energy’s brightest innovators. This is the progress powering tomorrow.

Allen Hall: Andrew and Brad, welcome to the show. Thanks for having us. Thank you. Well, we’re gonna start off by talking about carbon protrusions, because that’s the focus of your technology, title IX composites, and there’s been some recent advancements that are really fascinating, but I, I kind of wanna go back a minute because carbon pull protrusions are the future, even though we’re still making some fiberglass blades that’ll have a limited lifespan.

We’re gonna be moving to carbon protrusions because the strength and the weight. And the cost, simplicity of it, uh, just makes carbon protrusions the future. And Tightline Composites has been key in that mold of making these, uh, carbon planks and getting ’em out to industry. I. But one of the big problems with any sort of carbon plank product is it [00:01:00] usually has a peel ply.

And Andrew, you wanna talk about what that peel ply does and why it’s used and why we need it.

Andrew Davis: You really need that surface energy created by removing the peel ply to, to get an effective bond as you’re building your spark cap. And so for years, this has just been considered a necessary evil. Uh, in terms of creating, creating that effective bond.

And, and that’s, that’s the world we’ve lived in for the last 10 years.

Allen Hall: And a peel ply for those who are not deep into the composite industry. Peel, ply is a removable. Ply a fabric that’s that’s applied over the carbon on the outside and it’s kind of thicker and it has, uh, this kind of rough and surface.

So when you build the protrusion, you got these two layers of this peel ply on either side, and it travels with the product. So as, uh, tight line sends out product, these, these peel plys go with it. [00:02:00] And ideally when they get to the factory, the, the people on the floor. Pull this peel play off and it’s not fun to peel off one and two, it’s kind of invisible.

So you can forget that it’s there and install it in ablaze. And Joel, you have seen that in the field. You’ve seen protrusions where they have the ply still attached.

Joel Saxum: Yeah, it’s, it’s like, um, Alan, we saw one of the other day too, where it was like there was still a coating on a down conductor, right? So like, if you.

If you try to embed this product, the, the idea behind peel and the peel ply is you peel the peel ply, and now you have a prepped surface that can be chemically and mechanically bonded to easier or in, in, in, in a much better way, as designed. So if you forget to pull that off, now you have a structural element inside the PLA or inside of whatever you may be building in composites.

That doesn’t have the ability to bond properly to that protrusion, to that carbon plank or to that glass plank. Uh, and if that’s the case, you lose, I can’t [00:03:00] put a number to it. Right. But you lose an immense

Andrew Davis: amount of structural strength. And Joel, just to underline your point, we’ve heard from customers who will remain nameless that it is, it, it happens that, that this will get caught on scan.

Uh, when the blade is completely done, and then the entire blade has to be scrapped. There’s no, there’s no fixing it.

Allen Hall: Yeah. That, that, that gets expensive. Real quick, you’re talking about a hundred thousand dollars blades for onshore. Forget about offshore for a minute. An offshore blade, multi times, is that three or four?

Uh, so the, the, the, the engineering is right. The protrusion is the right answer and carbon is the right answer for blades, but it’s really comes down to getting. The peel ply and what, what do you wanna deal with that? ’cause the other part of the peel ply is you just create this waste cycle that peel ply gets just tossed into the garbage.

It’s not a recyclable thing, it’s one use and it’s done. So the, in the carbon protrusion world, if we can remove that peel ply, that is huge, [00:04:00]gigantic. However, it is been really hard to do that because there hasn’t been any technology to remove it, and we’ve been using it. Forever in aerospace and wind, and that’s where Brad comes in.

And Brad’s company has developed a way to eliminate the Peel ply, which is a huge cost savings and a labor savings and a, you know, a downstream savings. Brad, you wanna under describe the, what you’re bringing to Tightline and, and how this technology works.

Brad Schmidt: So we do protrusion within Aviant as well, and we’ve developed this over the last four or five years and have been using it internally.

For our own glass profiles, um, in, in various markets, including wind. Um, but essentially, yes, have eliminated the need for these glass protrusions to, uh, you know, require peel, ply or alternatively sanding or some sort of grinding process prior to, um, adhesion. So the, it is, it is actually in the chemistry of the [00:05:00] resin system.

It’s not a surface treatment and it is throughout the part. Um, so if you cut the, you know, through apart that same adhesion, uh, you know, or bond strength will be realized throughout the, the Matrix. It’s not just on the surface. Um, so again, we’ve been using this in-house for a number of years. We’ve known the Tightline team for some time, and we approach them.

Late last year, uh, about six months ago, let’s say. And um, obviously there was a lot of interest in tightline. There was a lot of skepticism at first in that, uh, this would even work, but they were willing to give it a try. So we sent them a small batch of resin with this, call it an additive in it. They ran some trials and then we tested in our lab, uh, did the lap shear testing on a traditional, uh, carbon plank with peel ply.

And then a protruded plank without peel ply. With this new chemistry, we saw on average about an 8% [00:06:00] improved improvement in bond strength in the, with the chemistry versus the traditional peel ply, and a much tighter standard deviation in that bond strength.

Joel Saxum: So let me, let me, let me get this straight. So you not only have removed waste, removed the cost of those, the procuring of the PO ply materials.

Increase the ability for manufacturing processes to be correct and at the same time have improved the strength of the bond. That’s right.

Brad Schmidt: Yeah. I mean, um, and seems too good to be true, right? And we’re trying to find out where this doesn’t work, but, but we haven’t, yeah, we have not been able to poke holes in it yet.

Um, and then on the mechanical property side, uh, they’ve actually seen a slight improvement. Um, and in theory now without Peel ply, you can add a bit more carbon. Where the PO ply would’ve previously taken up space in the dye. Right. Um, and the additive is, is at a very low concentration, so it’s had no detrimental effects on any of the mechanical.

Properties.

Allen Hall: That is amazing. So [00:07:00] obviously the first question that any composite engineer is gonna ask is, well, it, it’s a resin change, right? So I gotta requalify the material. But it’s not really a resin change are you’re still using the same resin system. Correct. So it is, it is it. Is it a magic powder or a chemical treatment to the existing resin system?

And I, you know, composite engineers are always weary of change, right? If they have something they, that they know, they tested, it’s been through all the processes and all the approvals, and now you wanna make a change. So the, the always the answer is no, which is crazy because if, if you’re improving it and you can show it and you have the data to back it up, and Ian’s gonna do that.

You can use the same resin system, just add a little bit of technology to it to remove peel ply, and, and that’s the approach. So it’s not a, um, it’s not a wholesale change in the resin system or the strength of the system. It is in the, the surface energy piece. That technology is pretty transferrable, right?

I mean, [00:08:00] pretty much anybody with an existing resin system can use this technology, right?

Brad Schmidt: Yeah, absolutely. So we developed this originally in a vinyl Lester system. We’ve since proven it out in, um, developed it in polyester as well as epoxy, which is used in the, uh, the carbon poulation process for the planks.

Um. So it’s absolutely transferrable. Like I said, it’s at a very low concentration, so it is the same base resin system just with our, uh, you know, magic powder as you referred to. And I think

Joel Saxum: I ask you a, a, a question that’s a little bit. Um, so we were talking about carbon protrusions and other kind of protrusion, cla protrusions and different vinyl es the things that you’ve done in the pultrusion space.

This is fantastic. However, let me ask you another question. If this is mixed with a resin system, where else can it be used? Can it be used in repairs? Could it be used in, I know like one of the things that happens in wind right now, Alan and I talked too about it regularly, is these root bushing pullout things and there’s a couple companies working on Gulf wind [00:09:00] technology.

We foresee there’s some people working on fixes for these. Could this be added to whatever resin systems they’re using and increase? And I’m thinking about that 8% strength in bond number. Can that be used as a repair methodology too? Yeah, without a doubt.

Brad Schmidt: Um, and actually I say 8% that’s in the epoxy system.

In our vinyl ester and polyester, we see upwards of 10 to almost 15% in a lot of cases. So yes, for repair, and I think where it gets more exciting is, um, in blade infusion. Uh, and, and there’s, we are working through some infusion trials right now. We’ve only applied this to protrusion thus far, but in theory, there’s no reason this also doesn’t work in an infusion process.

Um, and not just for wind, I think about the marine industry too, where you’re infusing a boat haul and then going back and standing the entire inside of a hu before any adhesion. So, uh, yeah, we’re really excited about the potential here. Um, this is a trade secret, so we’ve been very selective with, you know, who we partner with and we’ve [00:10:00] known the tight line team for a number of years, and there’s a high degree of trust there.

And, um, but, but yes, to answer your question, repair. Infusion, you know, we, we wanna eliminate any secondary prep, peel, ply, grinding, et cetera, prior to, uh, bonding.

Allen Hall: And Andrew, that’s gonna be great for Tightline. If you have an improved adhesion system with less stuff and less waste downstream, that’s a major advantage for Tightline.

Andrew Davis: It’s amazing. And, and I, I, you know, I don’t wanna say that we were skeptical, but, uh, the, the results were surprising and amazing in a, in a very happy way. And, um. I, you know, I, I think you hit the nail on the head, Joel, with the, you know, waste is obviously a big thing from a cost standpoint, from an environmental footprint standpoint.

There’s obviously labor cost improvements here. When you think about what one of these factories looks like, the, the peel ply is largely removed and automated process by a [00:11:00] machine that might at the same time also be chaing or whatever. Um. That’s not a hundred percent foolproof. And so you’ll have bits of peel ply that, that get stuck in there.

The machine will get gummed up and the peel ply will go everywhere. Those machines need to be maintained. You know, there’s, when you sort of add it up, there’s rework that’s caused by problems that are caused by peel, ply, and, and, and in extreme cases, scrap, um, you know, all that adds up to labor and, um. I and, and quality, right?

When you, when you sort of think about the scrap things, um, environmental e eventually you won’t need to. We, we talked to a customer who said, man, we just bought a bunch of machines to fuel ply. Like, why couldn’t you have told me this last month? Right? Um, but you know, you won’t have to buy those machines.

Um. I, you know, there’s some little subtle things like the nylon six six, that’s [00:12:00] the material that Peel ply is made out of. Um, there’s a couple things about that. It, it’s cut for each profile. There’s a fair bit of waste on our end of, oh, well we’re done with this profile. We now we need different one and this doesn’t fit.

Or We’re, we’re moving to different lengths and so these lengths don’t work anymore. We, we, on our end, throw out a fair bit of peel, ply as well. Really the historically, the only cost-effective source of Peel ply has been China. And so there’s a little bit of, you know, in the crazy world that we live in today, you know, geopolitical tariffs, all that kind of trade issues that come into play that, of course there’s peel ply in the United States for, for example, the aerospace industry.

But that’s a. Exponentially different price point. Um, so you know, all of this, when you sort of put this into the stew, it, it’s, it’s lower cost, higher quality, better manufacturability. And, and [00:13:00] for us that’s, that’s such a big deal because I, I mean, we’re the blast man standing in the independent carbon fiber plank protrusion game.

Everyone else who protrudes outside of China. Is a carbon fiber manufacturer, and we think, we continue to believe that there’s some value in, in, in that independence. But, um, it, and from, from our standpoint, we need to show, we need to show value to the OEM and everyone, everyone knows the, the financial pressures that the OEMs are under.

Um, in our corner of the universe, an enormous amount of carbon fiber supply has come online in China. That’s being protruded in China. And you know, that’s a very, that’s for the carbon blades, to your point, that being the future, that’s 40% of the cost of some of these blades. And so if you, if you’re in cost reduction mode, where are you gonna look?

[00:14:00] Well, this is by far the biggest single cost point in a blade. China looks pretty tempting. And, um, from a conversion cost, turning that fiber into plank, we are absolutely competitive with anywhere in the world because there’s just not much labor cost in it. Um, and in what we do, um, however, you know, we’re kind of in the game of TA taking all of the non-China fiber and turning it into, you know, we.

We, we continue to believe that that OEMs will not go 100% all in on a China supply chain, and they’re gonna need someone to produce that plank. You know, that’s, that’s great. But we still, we still have to be at a competitive point from a total value standpoint. And I think that’s what the partnership with Avian, why that’s amazing is because all these things that.

We’re talking about really add up to, you know, value for [00:15:00] the OEM, the lowering cost increase in quality. Those are. You know, there’s, there’s plenty of, been plenty of quality issues that, you know, add up to cost. Uh, and, um, and I think we hit both of those hot button issues with this. So I we’re really excited.

Joel Saxum: I think this is a really timely discussion. Um, Andrew, Alan, Brad, we’re sitting here talking about this because last night Alan and I had a conversation about innovation in wind in the United States, and there’s a certain OEM, uh, rhymes with, uh, shmi. Uh, that, that gave $50 million to MIT for wind based or for renewables based research.

Right. So we were thinking about what could we do with $50 million? Where does this money in research and US based wind innovation that can be actioned now? Right? That can be something that’s not. Pie in the sky, 5, 10, 15, 20, 30 years into future research. While that stuff is good, we know that we need things that can change the way the [00:16:00] wind industry works today.

And that is lowering costs, making things more efficient, making things better, which is what this is. So it’s really, it’s ah. I’m excited about this conversation and you can kind of hear it, my voice right now, just simply because we’re seeing innovation happen in the United States with US-based companies that can change, uh, the competitiveness of US-based product in the wind market, but also lift that whole wind market, right?

Like this is something that can change the way things are done, that can make more us more competitive in the way we, uh, build blades and make them, and, you know. Ideally, right? We have a better, better product in the field, less RCAs for, for, uh, liberated blades and such in the field. Um, so I guess my, my next question for you guys is you’ve been, you, you, you have this partnership, avian developing the technology.

Tight line, putting it out into the field or putting it, you know, in front of clients in the field. What have you [00:17:00] received from feedback, from your, you know, basically market entry process? Like, have you been talking with blade manufacturers or OEMs and what are they saying back to you guys about the product?

Andrew Davis: I would

Joel Saxum: say

Andrew Davis: I, you know, it’s impossible to, these guys live the world of peel ply every day. It’s impossible to, to, to, to not. Uh, simultaneously be really excited to know more, but also really skeptical. Right? And, uh, so, uh, we had some, Brad and I, and, and our colleagues had some great meetings at JEC. Um, we’ve had some follow up since then.

We’ve got samples in the hands of, uh, a number of customers. They’re gonna go through the same testing that we’ve gone through, and I, you know, our. Our point of view on this, ultimately it’s, it’s the, the OEM’s decision. But is that you, you look at what this spark cap without peel [00:18:00] ply looks like, and you look at what the spark cap with, you know, made with peel ply looks like.

And I, I think you’re gonna see certainly not a worst part, but you know, probably a little bit better part. Um, and, and. Way easier to manufacture, um, you know, with lower total cost, better value. And I, you know, that’s, um, you know, I, I think, you know, that leads to a, this is a like, for like drop in kind of replacement and, um.

But, but that’s their call. And, and they’ll go through that testing and, um, and so that, that’s the phase we’re in now. Um, but I I, it, it, it was fun. I mean, you know, these meetings, if, if you’re in our position and you have these meetings with OEMs, it’s it, we’re talking about price and competitiveness and.[00:19:00]

This kind of stuff and to be able to talk about something that really sort of adds, adds a lot of value as something new and innovative was, I, it, it was a real personal highlight, I think, for everyone in the room.

Allen Hall: So let me hit you with the three F’s form, fit and function. Every engineer when they make a change like this, wants to know if any of those have changed.

Is there any change to the form, fit or function because you, the peel ply has been removed. I guess you can add a little bit more carbon to it, make it stronger. To cover up the difference.

Andrew Davis: It’s super small, but yes, you, you, if you, if you want the same properties in a slightly smaller form, that, that’s obviously what, what you’d get if you just use the same mold.

Um, if, if you want something with slightly higher properties, a little beefier, um, fill up that mold that you know and, and. Uh, that, that’s doable too. Right? So I, it’s really, uh, I, I think it’s [00:20:00] gonna be their call, but I assume they’re gonna want something that’s. More or less the same thing.

Allen Hall: So then what are the next steps here are, are we going to be going through a, a certification like with DNV?

Is that where the OEMs are headed to, to get a, a stamp on it for the product? Or is it OEM by OEM or even operator by operator? I know operators would be really interested in this technology.

Andrew Davis: I think it’s gonna be OEM by OEM. Um, and I think I, I, I, I, I, I think it will depend on their particular view of how.

How much of a drop in is this right? And, um, uh, but the, the testing, the standard testing that, you know, we’re all able to do, um, I, I think will give them enough to go on to say, Hey, you know, there may be some other confirm confirming things we want to do, but wow, this is a, this is a big difference.

Joel Saxum: I see it in that build to spec market.

I. [00:21:00] The built to print. Yes. Then you have to go through the OEM and all these things and that’s, that’s fantastic. But that built to spec market where every one of these blade manufacturers is looking for that little leg up to make them more profitable, better margins, better product, those guys are gonna jump on this thing.

I would imagine. So I

Brad Schmidt: think one other thing, you know, I didn’t mention earlier, but has come up is shelf life. Um, and we have done testing on, uh, glass protrusions, like I said, that we’ve been making for years with this technology. And, and after 12 months, there’s no fall off in properties and adhesive properties.

We’re working toward 24 months. But, uh, we don’t expect any change.

Andrew Davis: I, I think on the, on the finer points, uh, you know, just to emphasize another point Brad made earlier is there’s, there’s way less variability. In the, um, you know, with Peel ply, you there, there’s a lot of variability when you rip that peel, ply off.[00:22:00]

Um, this, this really cuts it down by or order of magnitude.

Allen Hall: Well, that’s the trouble now is that we’ve reduced the margins that you’ve talked to blade designers, the margins that come down considerably, and they’re really relying upon that carbon to do majority of the work. So improving that adhesion into the blade itself.

Gets rid of some of those margin concerns. Now you have a consistency, which is where everybody’s driving to right now. All the blade manufacturers are really trying to get the process honed in so that blades are repeatable. Time after time. This is where Tightline comes in and Ian’s technology to make this easier on blade manufacturers.

Now, if you’re a blade manufacturer, you need to get a hold of Tightline and Andrew that I guess they’ll be calling you. How did they do that? And even operators for that sense. How do operators get ahold of you to find out about the technology?

Andrew Davis: I, you, you can find us at, at tightline composites.com and, uh, call, call our office in St.

Louis, Missouri. We’re, uh, you know, right, right in the middle of the country, uh, doing business with our, our [00:23:00] fellow domestic partner here. And, uh, it’s, um, uh, I. You know, we, we, we would love to have those conversations. Um, and I think, you know, to, to, to toot Brad sworn a little bit that I, you know, we are over the moon about this opportunity at Tightline, but I, I, our heads spin when you think about all the other applications that you could apply this to.

I mean, we we’re a little bit of a one trick pony at our, at, at tight. We’re very, we’re very focused. Um, but, uh. Boy, um, you know, infusion, uh, in wind and, and everything else is, is. Unbelievable.

Allen Hall: Yeah. Brad, is your phone ringing off the hook and how do people get ahold of you?

Andrew Davis: I

Brad Schmidt: silenced it for the podcast, so not yet, but

Allen Hall: good move.

Brad Schmidt: Um, yeah, I mean, so avian.com Avian is a, you know, material science innovation company, global, global company, uh, headquartered near [00:24:00] Cleveland, Ohio. The, uh, our protrusion business called Glass Forms is in Birmingham, Alabama. Um, but you can navigate to our composites division, um, you know, at, within the website.

I’m also on LinkedIn and so, uh, connect to a lot of people through LinkedIn. But, uh, we’d love to talk about whether it’s, you know, protrusions aside from the carbon plank. We do, you know, and have pretty extensive pultrusion capability there in Alabama, or if it’s the resin chemistry itself and how it could be applied to other processes.

We’re, uh. Looking forward to having those conversations.

Allen Hall: Wow. This has been a tremendous discussion. I’ve learned a lot and protrusions are definitely the future. We just need to make them simpler, less labor intensive, and we need to move forward. So this is exciting. And Brad and Andrew, thank you so much for being on the podcast today.

Thank you for having us. Thank you. It’s [00:25:00] fun.

https://weatherguardwind.com/peel-ply-carbon-pultrusion/

Renewable Energy

PowerCurve’s Innovative Vortex Generators and Serrations

Published

18 hours ago

April 23, 2026

Alice Rush

Weather Guard Lightning Tech

PowerCurve’s Innovative Vortex Generators and Serrations

Nicholas Gaudern from PowerCurve joins to discuss SilentEdge serrations with up to 5 dB noise reduction, Dragon Scale VGs for AEP recovery, and their approach to products that actually perform in the field. Contact PowerCurve on LinkedIn for more information.

Sign up now for Uptime Tech News, our weekly newsletter on all things wind technology. This episode is sponsored by Weather Guard Lightning Tech. Learn more about Weather Guard’s StrikeTape Wind Turbine LPS retrofit. Follow the show on YouTube, Linkedin and visit Weather Guard on the web. And subscribe to Rosemary’s “Engineering with Rosie” YouTube channel here. Have a question we can answer on the show? Email us!

Welcome to Uptime Spotlight, shining Light on Wind. Energy’s brightest innovators. This is the Progress Powering tomorrow.

Allen Hall: Nicholas, welcome back to the show.

Nicholas Gaudern: Thanks, Allen. Always a pleasure.

Allen Hall: Well, there’s a lot of new products coming outta PowerCurve. And PowerCurve is the aerodynamic leader in add-ons and making your turbines perform at higher efficiency with less loss. Uh, so basically taking that standard OEM blade and making it work the way it was intended to work.

Nicholas Gaudern: Yes. We

Allen Hall: like to

Nicholas Gaudern: think so. Yeah.

Allen Hall: And there’s a, there’s a lot of new technology that you’ve been working on in the lab that you haven’t been able to explore to the, introduce to the world, so to speak. Yeah. And we’ve seen some of it from the inside of, you know, you’re working behind the scenes or working really hard to get this done, but now that technology has been released to the world, and we’re gonna introduce it today, some new trailing edge.

[00:01:00] Components. Yeah. That really, really reduce the noise. But they, they look a little bit odd. Yes. There’s a lot of ADON dams going on with

Nicholas Gaudern: Yeah.

Allen Hall: With these. So what, what do you call these new trailing edge parts?

Nicholas Gaudern: So, so what you have in your hand here? This is the Silence edge, uh, serration. So this is our new trailing Edge Serration products.

Now, most people, when they think of training restorations, they are thinking of triangles.

Allen Hall: Exactly.

Nicholas Gaudern: These Dino tails. Dino Tails, that’s the Siemens, Siemens name for them. Pretty, pretty standard. You see ’em on a lot of turbines now. Sure. And they work, you know, they do do a job. They do a job. They reduce noise.

But like with lots of things in, in aerodynamics, there’s lots of different ways that you can solve a problem and some are better than others. So we’ve worked for a long, long time in the wind tunnel, uh, in the CFD simulations, and we’ve come up with this pretty unique shape. We think,

Allen Hall: well, the, the, the shape is unique and if you, if you look at it, there’s actually different heights to the, the triangle, so to speak.

To mix the air from the pressure and the [00:02:00] suction side to reduce the, the level of noise coming off the blade

Nicholas Gaudern: e Exactly. So we have, uh, we have an asymmetry to the part. We have these different tooth lengths. We have, uh, a lot of changes in thickness going on across the part. So it may be a little bit difficult to see on the camera, but these are quite sculpted 3D components.

They’re not, they’re not flat stock white triangles. No, no. There’s a lot of thickness detail going on here. We’ve paid a lot of attention to the edges. We’ve paid a lot of attention to these gaps between the teeth as well. So all of this is about trying to figure out what is the best way to reduce noise.

And something that not a lot of people will, will admit, but it’s true, is that as an industry we don’t really understand the fundamentals of how serrations work.

Allen Hall: It’s a complicated

Nicholas Gaudern: problem. It’s a really complicated thing. Problem, yeah. Yes. So trying to simulate it in CFD is an absolute nightmare. The, the mesh sizes required, the physics models required are really, really difficult.

So what we found is that you’re probably better off spending [00:03:00] most of your time and money in the wind tunnel. Yes. So, so we go to DTU, they have this wonderful, uh, air acoustic wind tunnel, the pool of core tunnel. It’s one the best tunnels in the industry for doing this kind of work. It

Allen Hall: is

Nicholas Gaudern: because you can measure acoustics and aerodynamics at the same time.

So this allows us to do a lot of very cost effective iteration for this kind of design work. So we know what’s important. You know, we’ve, we’ve studied all the different parameters of serrations lengths, aspect ratios, angles, thicknesses, all this kind of stuff. And it’s about bringing them together into a, into a coherent product.

So this is, this is a result of a lot of design of experiments, a lot of iteration, and combining wind tunnel and CFD to kind of get the best of both of those tools. So,

Allen Hall: so what’s the. Noise reduction compared to those standard triangular trailing aerations. Yeah.

Nicholas Gaudern: So there’s lots of different ways of, of thinking about noise reduction, but I think probably the most useful is the O-A-S-P-L.

So this is the overall sound pressure level. Right. Is kind of what [00:04:00]typically you’ll be measuring in an IEC test.

Allen Hall: Right.

Nicholas Gaudern: And that’s measured in decibels, but a way to decibels because it’s important that we’re waiting to what the human ear can actually hear. Right. Perceive. Exactly. So that’s the numbers we report.

For the field test we’ve recently completed with Silent Edge, we’re seeing up to five decibels of O-A-S-P-L noise reduction.

Allen Hall: Okay. So what’s that mean in terms of what I hear on the ground?

Nicholas Gaudern: So that is an absolutely huge reduction. It’s multiple times of reduction because you know, decibels on a log scale,

Allen Hall: right?

Nicholas Gaudern: So five DB is is enormous. It’s

Allen Hall: a lot. Yeah.

Nicholas Gaudern: And what’s really interesting is that if you have a turbine that’s running in a noise mode, just one decibel reduction. Of power, sound, sound, power level might be three or 4% P loss. I mean, that, that’s, that’s huge. Think about that loss. So if you need to reduce noise by five decibels to get within a regulation, imagine how much a EP you have to throw away by basically turning down the [00:05:00] turbine to do that.

Allen Hall: That’s right.

Nicholas Gaudern: So that’s really what the, the business case for these kind of products is. It means you can escape noise modes because as soon as you use a noise mode. You are throwing away energy.

Allen Hall: You’re throwing well you’re throwing away profits.

Nicholas Gaudern: Exactly.

Allen Hall: So you’re just losing money to reduce the noise.

Now you can operate at peak.

Nicholas Gaudern: Yep.

Allen Hall: Power output without the creating the noise where you have that risk. Right. So, and particularly in a lot of countries now, there are noise regulations. Yes. And they are very well monitored.

Nicholas Gaudern: Yep.

Allen Hall: We’re seeing it more and more where, uh, government agencies are coming out and checking.

Yes. ’cause they have a complaint and so you get a complaint. Oh, that’s fine. Or someone can complain. Yeah. You know, you need to be making your numbers.

Nicholas Gaudern: Yep. And, and the industry needs to be good neighbors, you know? It

Allen Hall: certainly does.

Nicholas Gaudern: Uh, we have to make sure that people are, you know, approving and comfortable with having wind turbines in their backyard.

Sure. And noise is a big part of that.

Allen Hall: It is.

Nicholas Gaudern: So yeah. Ap sure. That’s really important. Being a good [00:06:00] neighbor also important.

Allen Hall: Right.

Nicholas Gaudern: Meeting the regulations. Obviously you have to meet the regulations. So this product, um, has been through a really long development cycle, and we’re now putting the final touches to the, to the tooling.

So this is available now.

Allen Hall: Oh, wow.

Nicholas Gaudern: Okay. Great. Um, and we’re hoping that in the next uh, few months we’ll be getting even more turbines equipped out in the field with, with the technology.

Allen Hall: So, oh, sure. There’s a, you think about the number of turbines that are in service, hundreds of thousands total worldwide.

A lot of them have no noise reduction at all.

Nicholas Gaudern: No. No.

Allen Hall: And they have a lot of complaints from the neighbors.

Nicholas Gaudern: Exactly.

Allen Hall: Trying to expand wind into new areas, uh, is hard because the, the experience of the previous Yes. Neighbor

Nicholas Gaudern: Yep.

Allen Hall: Grows into future neighbors. So fixing the turbines you have out in sight today helps you get the next site.

I know we don’t always think about that, but that’s exactly how it works. Yeah, of course. Uh, we need to be conscientious of the people of the turbines we have in service right now. So that we can continue to grow wind [00:07:00] globally and more regulations on noise are gonna come unless we start taking care of the problem ourselves.

Nicholas Gaudern: Yep. And another really important thing with Serrations is that you have to design them so that they don’t impact the loads on the rest of the turbine.

Allen Hall: Right. And people forget about that.

Nicholas Gaudern: Yes.

Allen Hall: Can you just, can’t just throw up any device up there. And think, well, my blade’s gonna be happy with it. It may not be happy with that device.

Nicholas Gaudern: You have to really carefully understand what the existing blade aerodynamic signature is.

Allen Hall: Sure.

Nicholas Gaudern: How is that blade performing? What is the lift distribution across the span? Yeah.

Allen Hall: Right. Yeah.

Nicholas Gaudern: So what we do, and we, we’ve talked about it before we go and laser scan blades. We build CAD models, we build CFD models so we can actually understand how much lift a blade can take and what’s the benefit or the penalty of doing so.

So these serrations are designed by default to be load neutral. They won’t increase lift. They won’t reduce lift. That’s what

Allen Hall: it should

Nicholas Gaudern: be. That’s where you should start,

Allen Hall: right?

Nicholas Gaudern: And maybe there’s some scope to do something else [00:08:00] on certain turbines, but you shouldn’t, you shouldn’t guess. You, you need to calculate, you need to simulate, you need to think very carefully about that.

So that’s what we do with these, uh, with these serrations, we go through this very careful aerodynamic design process to make sure that they reduce noise and that’s it. They don’t increase loads, they don’t reduce AP by killing lift. And that’s, that’s an important aspect.

Allen Hall: Well, that’s the goal.

Nicholas Gaudern: Yes,

Allen Hall: exactly.

I don’t necessarily want to increase power. I don’t wanna put more load in my blade, but people do that. I’ve seen that happen and man, they regret it.

Nicholas Gaudern: Yeah, regret it. There’s, there’s some pretty wild claims out there as well about observations can and can’t do. And uh, like with lots of things, it’s important to just do the simulations, speak to some experts and, um.

Yeah, maybe take the, the less exciting path, you know, sometimes,

Allen Hall: well, no. Yeah. Well, less exciting path where I don’t have a broken blade.

Nicholas Gaudern: Yeah, exactly.

Allen Hall: Yeah. That’s a lot less exciting. It’s, it’s definitely more profitable. Now, the Dragon Scale Vortex generator has been [00:09:00] around about a year or so.

Nicholas Gaudern: Yep, yep.

Allen Hall: And the thing about these devices, and they’re so unique, interesting to think about because you typically think of a vortex generator as this being this little bit of a fence.

Where you are tripping the air and making it fall back down onto the blade.

Nicholas Gaudern: Yep.

Allen Hall: A really, it works.

Nicholas Gaudern: It works.

Allen Hall: But it’s it’s

Nicholas Gaudern: been around a long time.

Allen Hall: Yeah. Yeah. It, it does, it does do this thing. And they, they were, they came outta the aviation business. We use ’em on airplanes to keep air flow over the control surfaces so we can continue to fly even in close to stall conditions.

All that makes sense. And airplanes are not a wind turbine.

Nicholas Gaudern: Yes.

Allen Hall: So there’s different things happening there. So although they work great on on aircraft, they’re not necessarily the most efficient thing for a wind turbine where you’re trying to generate power and revenue from the rotation of the blades.

Nicholas Gaudern: Exactly.

Allen Hall: So this is a completely different way of thinking about getting the airflow back onto the blade where it produces [00:10:00] revenue.

Nicholas Gaudern: And what’s really nice is to actually see this together with silent edge, because historically, and maybe not even historically. Serrations VGs, they’re triangles. They work, they do a job.

But that doesn’t mean you can’t do it in a different way. In a better way.

Allen Hall: Right.

Nicholas Gaudern: And that’s the same principles from applying with Silence Edge and Dragon Scale. We want to work the flow in the most efficient way possible.

Allen Hall: Right. You’re trying to get to an

outcome.

Nicholas Gaudern: Yeah, exactly.

Allen Hall: Efficiently.

Nicholas Gaudern: We want to, we want to target very specific things on the blade, and that’s where you can see there’s a few different styles of Dragon Scale that we have on the table here.

We have some that are two fins. We have some that are three fins. We have different sizes, and this is because they’re tailored to different parts of the blade. So these three Fin Dragon scales, their focus is ultimate lift. We are creating a really powerful vortex through this combination of three air foils, if you imagine, um, the inside of a Turbo fan.

You have these cascading air force. [00:11:00] You look at the leading edge slacks on an aircraft. You look at the front wing of a Formula one car. It’s that kind of concept.

Allen Hall: It’s like that,

Nicholas Gaudern: and it’s these air force that are cooperating with each other.

Allen Hall: Right.

Nicholas Gaudern: To end up with a more beneficial result. ‘

Allen Hall: cause an air force by itself does a function, but when you combine airflows together in the right way

Nicholas Gaudern: Exactly.

Allen Hall: You can really control airflow efficiently, less losses. More of what you want out the backside. Yeah, exactly. It’s, it’s the backside you’re trying to work on, on a VG or, or dragon scales. You’re trying to create this flow which gets the airflow back onto the blade to create power. We,

Nicholas Gaudern: we want as much attached flow as possible and down exactly down in the roots of a blade.

We have to have really thick aerofoils, you know, blades about round. They’re basically cylinders.

Allen Hall: Yeah.

Nicholas Gaudern: And that, that’s essential, right? We have to have the blade take a lot of load into the root aerodynamically. They’re horrible.

Allen Hall: Yeah.

Nicholas Gaudern: So this is where these, uh, these powerful Dragon Scale VGs come into play because what they do is they’re [00:12:00] reenergizing the flow over the aerofoils, and they’re ensuring that that flow remains attached for much, much longer than if those bgs weren’t there.

So down in the root, you’ll get significant boosts to the lift that those sections can generate. And what’s more lift? It goes to more torque, it goes to more power, goes to more a EP. So these dragon scale VGs in the root are there to boost, lift, and boost EP out on the tip of the blade. Things are actually a little bit different because it’s way different.

You shouldn’t really have stall there to begin with if your blade’s been designed well.

Allen Hall: But if you have leading edge erosion exactly. Or some other things that are happening, you can have real aerodynamic problems.

Nicholas Gaudern: So yeah, as soon as you have erosion, uh, maybe your stall margin is not as big as you thought it was.

You’re starting to get some significant losses of lift Yes out towards the tip of the blade. So that’s where these, uh, TwoFin uh, variants come in. So it’s still a dragon scale vg, it’s still the same concept of these cascading error foils. Yeah, but these are [00:13:00] designed for basically ultimate lift to drag ratio.

Mm-hmm. So we don’t really want more maximum lift outta the tip. We kind of have enough, but what we do want is to keep stable attached flow and we want to do it for the less, uh, least drag penalty possible. So basically we want to get rid of as much parasitic drag as we can. These two fin dragon scales, we are seeing 25 plus percent improvements in lift to drag ratio.

Compared to a standard triangle vg. I mean that’s huge.

Allen Hall: That that is really

Nicholas Gaudern: huge.

Allen Hall: That’s huge, right? Because people have seen these, uh, triangular VGs in a lot of places. And one thing I’m noticing more recently is that those VGs, because they’re so draggy, they tend to flutter and they tend to break in just off.

Nicholas Gaudern: Interesting.

Allen Hall: So you’re having this failure mode because this thing is just blocking the air, getting the air to trip.

Nicholas Gaudern: Yeah.

Allen Hall: It’s not efficient. It does have its downsides ’cause it is. D definitely drag. Just face it, it’s it, is it a draggy [00:14:00] 1940s technology? That’s what it is. Where with the dragon scales, now we’re doing things a lot more efficiently and thinking about how do I get the airflow that the blade designer originally wanted?

Nicholas Gaudern: Yes,

Allen Hall: because the blade designer, they’re really intelligent people. They’re, they’re sitting designing blades. But the reality is what you design is on an ideal airflow, and what you have out in service are totally different things. As, as it turns out, the shape of the airflow is not what you think it is because it comes out of the tool and there’s a lot of touching with by humans that are grinding on the leading edges and doing the things that have to be done to manufacture it.

So you don’t really have an ideal blade when it comes out of the

Nicholas Gaudern: No. You

Allen Hall: never do factory. No, you never do.

Nicholas Gaudern: And it’s not polished either.

Allen Hall: It’s not polished. Right. So

Nicholas Gaudern: when you go to the wind tunnel, you have a perfect profile. Yes. And it’s polished. And it works basically. It

Allen Hall: works great. It

Nicholas Gaudern: works great.

Allen Hall: The theoretical and the actual match.

Yeah. In reality they do. I think a lot of operators are not [00:15:00] connected with that reality of, Hey, that Blade should be producing this amount of revenue for me, and it’s not. And you hear that discussion all the time, particularly in the us. It should be producing this amount of power. I’m doing all the calculations.

We are not producing that power. Why? The blade length’s saying, but the power’s not coming out of it. Well take a look at your leading edge, take a look at your yard full of shape and realize you’re going to have to do something like dragon scales to get that E energy. Exactly. Revenue back.

Nicholas Gaudern: You need to do a full aerodynamic health check.

Basically you do. And see what are all the possibilities to improve my blade performance. And some of it is down to the fundamental shape of the blade,

Allen Hall: right?

Nicholas Gaudern: But some of it is down to blade condition. Yes. Blade Blade manufacturing quality.

Allen Hall: Yes.

Nicholas Gaudern: Uh, what kind of paint did they put on it? What day of the week was it made?

And all these things can be compensated for by VGs and you’ll get more revenue out at the end.

Allen Hall: You say? ’cause what happens? The, the, the scenario which is hard to visualize unless [00:16:00] you’re an A and emesis, is that there comes on the suction side, and it should be, in a ideal sense, rolling all the way to the back edge of the blade and coming off.

What happens is though, is that. When you get leading edge erosion is that the air flow actually separates. Yeah.

Nicholas Gaudern: It

Allen Hall: doesn’t

Nicholas Gaudern: always make it, yeah.

Allen Hall: Doesn’t make it to the back edge. Yeah. And so you can see that, especially if, if there’s dirt in the air, you can look on dirty blades, you can see where that separation line is, and a lot of operators have sky specs, images or Zeit view images, and then go back and look at the blades.

It takes two minutes to go. I have

Nicholas Gaudern: particularly down in the root, you’ll see it.

Allen Hall: Oh, in the root all the time. You, you

Nicholas Gaudern: see it really clearly that that separation line

Allen Hall: all the time, you really see that separation line. I’m seeing it more and more up towards the tip. Interesting. That’s where the lightning protection, yeah.

Systems sit.

Nicholas Gaudern: Yeah.

Allen Hall: I see a lot of airflow that is not front to back on the suc. Well, you

Nicholas Gaudern: have a lot of three dimensional flow out there.

Allen Hall: You do towards the tip you do. And you realize how much power you’re losing there. And I think operators are just throwing away money.

Nicholas Gaudern: Yeah, exactly.

Allen Hall: So you could [00:17:00] put dragon skills on it very efficiently, very quickly.

Get that revenue back into your system and it’s gonna stay. So even if leading edge erosion happens, the dragon scales are gonna compensate for it. It’s gonna get the airflow back where it should be.

Nicholas Gaudern: Exactly. And the nice thing about this is, you know, we are building on well over a decade of upgrading turbines with aerodynamic components.

Oh yes. So this technology stands on the foundations of all of that work. In terms of the materials, the work instructions. Um, the fatigue calculate, you know, everything

Allen Hall: Yes.

Nicholas Gaudern: Is built on thousands of installations that we’ve done. Yes. So, although it’s a new technology aerodynamically, it’s not really new in lots of sensors.

Allen Hall: Well, I look at it this way. If you turn on Formula One today and look at what the new generation of cars running around as you look at the, that front. Yes. Uh. Fin. Yeah. What do I call it? Air foil shape in the front. It’s super complicated.

Nicholas Gaudern: The sculpting of the [00:18:00] surfaces is really impressive,

Allen Hall: right? There’s a lot of thought going into those surfaces versus you turn on a Formula One race or go on YouTube and look at a Formula One race from the 1980s.

Yeah, it’s basically a piece.

Nicholas Gaudern: Yeah.

Allen Hall: To provide down downforce. That’s it. The aerodynamics wasn’t really there, so we come a long way and a lot of that technology that happens in Formula One that happens in aviation eventually rolls down into. Yeah. Wind.

Nicholas Gaudern: Exactly

Allen Hall: right. So we, we, although we are not designing Formula One style blaze today, we’re taking that same knowledge and information and we’re applying that back in.

Nicholas Gaudern: Yeah. We’re

Allen Hall: secondarily we,

Nicholas Gaudern: which is a right thing to do. We’re taking, taking inspiration from all these different aerodynamic fields and, you know, picking the best

Allen Hall: Yes.

Nicholas Gaudern: From what’s available and just allowing ourselves to be a little bit more creative.

Allen Hall: Yes.

Nicholas Gaudern: And thinking outside the box a bit. There’s so many ways to do this as we’ve been saying.

And the import. And the

Allen Hall: data’s there.

Nicholas Gaudern: The data’s there. Exactly.

Allen Hall: The data’s there because you’ve been at the DTU Yep. Uh, wind Tunnel, which also has the acoustic piece to it. Yeah. So you have measured data from a reliable source. [00:19:00] You have field data, and you know, you put all these together, you’re gonna get that improvement back.

You’re gonna get your invest back, you’ll be more profitable.

Nicholas Gaudern: So Dragon Scale, focus on the AP. And that a EP will, uh, vary depending on the turbine.

Allen Hall: Sure.

Nicholas Gaudern: But we’ll assess the turbine and, and decide the best configuration, and then say silent edge. That’s the focus on the noise reduction. And we’re seeing up to five decibels OASP on the field.

It’s, which

Allen Hall: is crazy.

Nicholas Gaudern: It’s even more That’s really good that we were hoping for, you know?

Allen Hall: Yeah.

Nicholas Gaudern: So we, we know this is gonna be a, a great product.

Allen Hall: It looks very interesting.

Nicholas Gaudern: It does.

Allen Hall: It does it. It looks complicated and you think air airflow is complicated. It’s a compressible fluid. It’s not easy to, to just assume it’s gonna do what you think it is.

Yeah. You need to get into the tunnel. You need to replicate, you need to do all that work, which is expensive in time consuming. That’s why you go to someone like Power. Curver knows what they’re doing in the wind tunnel, knows how to measure those things and know when they’re getting nonsense. Out of their computer.

Nicholas Gaudern: mean, you, you’ll pay thousands and thousands of [00:20:00] Euros dollars a day to run a wind tunnel.

Allen Hall: You will.

Nicholas Gaudern: You’ve gotta Absolutely. You’ve gotta turn up with your plan in hand, that’s for sure.

Allen Hall: Oh, oh yeah, yeah, yeah. And I think there’s a lot of assumptions because it, aerodynamics is hard. You know, you watch these blade spin around, you don’t realize how complicated these devices are.

They are complicated. Those air force shapes we are running today have been through a lot of history, a lot of history to get to where we are now. Now we’re just gonna take him into the next generation. This, we’re bringing ’em into the two thousands. In sort of a

Nicholas Gaudern: sense, what I’m hoping to see is, you know, with the OEMs, some OEMs do it already, but it’s important to think about these components when you’re designing new blades as well, you should because then that will allow you a much bigger design space to work in.

And

Allen Hall: a lot less customer complaints.

Nicholas Gaudern: Yes.

Allen Hall: Where’s my power?

Nicholas Gaudern: Exactly. You know, these products, particularly the VGs, are really important tools for PowerCurve robustness. And some OEMs have known this for a long, long time.

Allen Hall: Yep.

Nicholas Gaudern: And you’ll see VGs on most of their blades. Mm-hmm. Others not so much. And that’s a design choice.

It’s a design philosophy. Um, and I think it may not [00:21:00] be the right one, you know?

Allen Hall: Well, I think the operators are asking to get the most out of their turbines. Yeah. Why shouldn’t they? They should be asking for that.

Nicholas Gaudern: I think for a, for a long time, and it’s not just in wind devices, like these have been considered, you know, band-aids fixes when you’ve, you’ve messed something up.

But I feel that’s a really negative way to think about products like this. They’re doing something that the kind of raw air fall shape on its own cannot achieve. Sure. Oh no. Right. You know, you might be able to mold some interesting stuff. Uh, as part of the blade, it’s very difficult to, to recreate the kind of aerodynamic effects that these products, uh, have.

Allen Hall: Right.

Nicholas Gaudern: So they shouldn’t be considered bandaids or fixes. No. They should be considered opportunities. And ways that you can maximize performance and unlock areas of the design space that previously weren’t accessible to.

Allen Hall: Sure. Every possible component that deals with fluid air is moving this way.

Nicholas Gaudern: Yes.

Allen Hall: Jet engines, you look at jet engine, how much more is going into those jet engines today in terms of this kind of [00:22:00] technology?

Yeah. All the race colors, doesn’t matter what class, where it is, is all looking at this anything to do with aircraft, it’s all over this.

Nicholas Gaudern: Yeah,

Allen Hall: exactly. Or, or doing this today. It’s just wind that’s behind

Nicholas Gaudern: wind. Wind is

Allen Hall: significantly

Nicholas Gaudern: behind. No,

Allen Hall: it’s not magic. It’s proven technology. It’s

Nicholas Gaudern: just good engineering.

Allen Hall: Well, it’s good engineering and if you call PowerCurve, they’re gonna help you under to to, to understand what you have today and what you could have tomorrow.

Nicholas Gaudern: Yes.

Allen Hall: And how this, these devices will improve your revenue stream.

Nicholas Gaudern: Exactly. You know, we will look at your blades, we’ll give you some good advice and maybe that advice will be that.

You know, a certain product isn’t right for your blade. Right. That’s fine.

Allen Hall: That’s an answer.

Nicholas Gaudern: That’s an answer.

Allen Hall: Yeah, it is.

Nicholas Gaudern: But let’s, let’s look at the blade. Let’s see what’s possible, and let’s just have a, have a proper conversation about it over some real data, some real

Allen Hall: facts. Right. I think that’s the key, and a lot of operators are afraid to talk about aerodynamics is it’s, it’s a difficult area to, to start the conversation on, right?

Yeah. But I think at the end of the day, when I work with PowerCurve, and I’ve worked with you guys for a [00:23:00] number of years, the answers I get back are intelligent and they’re not. Super complicated. This is what you’re gonna see. This is the improvement. And then we can, this is how we’re going to show you can get that improvement.

It’s not magic,

Nicholas Gaudern: no

Allen Hall: power crews backing up with data, which I think is the key, right? Because you’re the, you do hear a lot of noise in this industry about magical products that’ll do all these things. Particularly aerodynamic ones. Yes. PowerCurves, the ones really bringing the data.

Nicholas Gaudern: Yeah. And we have, we have the track record now.

We have like we do 17, 1800 turbines. Should be over 2000 very soon with our products on. Yeah. So we have a lot, we have a lot of data to draw on to know that we’re doing a good thing.

Allen Hall: Well, and speaking of that, because one of the questions that always pops up is, well, we have put these new VGs or trailing edges on, are they gonna stay on?

How durable are they?

Nicholas Gaudern: Yeah. And that’s a, that’s a really important question to ask was it doesn’t matter how fancy aerodynamic product is, if it falls off the blade.

Allen Hall: Right.

Nicholas Gaudern: So, you know, we’ve spent a lot of, uh, time and effort looking at how we should be fixing these products on. [00:24:00] So we use a, uh, a wet adhesive.

We specify a plexus adhesive to put our products in place. Really good adhesive. It’s a great adhesive and it means that they are not going anywhere. Basically. It’s a very, uh, forgiving adhesive. Uh, and it’s a very high spec. So we, we don’t use, uh, sided tape. We might have some of our products for some initial tack to help, you know, get the clear, the clear outta the line exactly.

But in terms of the bond itself, that is with a, a proper structural adhesive. So one thing that we are really proud of is that we haven’t got any, uh, reported failures of our panels over all the installations we’ve made. And that’s a combination of materials, but also geometry, work, instructions, adhesive.

It’s, it’s the full package. So it’s something that, um, yes, say we’re very proud of. And I think it’s, it’s a big part of what we do at PowerCurve, making sure the product is the right shape. Sure. But also making sure it stays on the blade.

Allen Hall: Well, you see it [00:25:00] from OEMs who have all kinds of aerodynamic treatments on there, and they’ll double set a tape to the blade, and then those parts are on the ground.

Nicholas Gaudern: Yeah. And double-sided tape. You can get some really nice spec tape. Sure.

Allen Hall: You,

Nicholas Gaudern: yeah. But it’s not

Allen Hall: 20 year device.

Nicholas Gaudern: No. And the installation tolerance required on surface prep is really, really high. So it’s possible. It’s just harder. I think it’s riskier,

Allen Hall: it’s risky.

Nicholas Gaudern: So, you know, I think for us, the adhesive is, is the way to go.

And, and it’s been proven out by the, by the track record.

Allen Hall: And some of the things we’ve seen over in Australia is when trailing ulcerations have come off, it’s been a safety concern. So now you got

Nicholas Gaudern: absolutely

Allen Hall: government officials involved in safety because parts are coming up. Turbine.

Nicholas Gaudern: Yeah.

Allen Hall: You

Nicholas Gaudern: can’t have these components flying, flying through the air.

That’s, that’s not safe.

Allen Hall: That’s because PowerCurve has done the homework.

Nicholas Gaudern: Yes.

Allen Hall: And has the track record. That’s why you wanna choose PowerCurve. So how do people get a hold of PowerCurve? How do they get a hold of you, Nicholas, to start the process?

Nicholas Gaudern: So, um, you’re welcome to reach out to us in lots of different ways.

We’re on LinkedIn. Uh, we have our website, [00:26:00] PowerCurve, dk, um, so yeah, LinkedIn websites. There’ll probably some links on this podcast as well to get in touch. But, um, yeah, whatever way works best for you.

Allen Hall: Yeah, it’s gonna be a busy season. So if you’re interested in doing anything with PowerCurve this year, you need to get on the website, get ahold of Nicholas.

And get started, uh, because now’s the time to maximize your revenue.

Nicholas Gaudern: Thanks a lot and great to talk to you,

Allen Hall: Nicholas. Thanks so much for being back on the podcast.

PowerCurve’s Innovative Vortex Generators and Serrations

Renewable Energy

Sharia Law

Published

21 hours ago

April 23, 2026

Alice Rush

Does Sharia Law pose an actual threat to Americans? Are we on a path to chopping off the hands of shoplifters? Passing laws that concern what people can and cannot eat? Polygamy? Forcing women to wear the hijab?

Maybe.

Or maybe this congressman is a loudmouth asshole whose constituents are morons.

Sharia Law

Renewable Energy

Another Thought on Tucker Carlson

Published

21 hours ago

April 23, 2026

Alice Rush

Carlson’s about-face on Trump is huge, as it signals that public intellectuals who wish to be taken seriously at this point cannot support the president, as his mental condition deteriorates and his criminality becomes ever more brazen.