Site is up on Wingsails

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gorgesailor said..

sailquik said..

gorgesailor said..Guys sailing modern race sails are already holding 5.5-6.0 in gusting to 40kts.

Well, maybe if the gusts are very brief. No way in a solid 40 knots actually measured with any accurate anemometer at the spot!
And maybe in the Luderitz speed channel, but that is a very unique situation, very broad and specialised. And they are large guys wearing heaps of extra lead weight!
There is a hell of a difference between the force of the wind at 30 knots compared with 35 knots. And there is a huge amount more difference in the force between 35 knots and 40 knots!!! It is not a linier scale of force to wind speed!! Most people just dont get that as they never actually have any way to measure the wind speed while they sail so it is very easy to way overestimate the wind strength

Agreed, but gusting to 40 is allot different to averaging 40... I have seen Pro-races where it was gusting to 35 & they chose to sail 5.5-5.8. So, would they chose to sail a 5.8 in gusting to 40? ... NO. Could they? Well I think the sail could handle it stability wise, but again why? Also you are right about overestimating wind. Here we actually to get a fair amount of days over 35 - enough to know what it looks like. White caps start ot blend together & become spindrift - or streaks of blowing spray... that's when you know you have sustained gusts of 35 or more...

Well said, SQ and GS.

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boardsurfr said..
There's this guy who always makes outrageous claims, often states exactly the opposite of what he just said days before, has been caught in hundreds of lies, and is regarded as "ethically defective" by the vast majority (a smaller majority would use the term "sociopath" instead). But instead of being in jail, he holds the highest office in "the greatest nation", and absolutely dominates the news coverage. While it seems that the majority ridicules him, he has a very strong fan base who rather believes that (almost) all news and media organizations are lying than doubt his words. Some of the experts who were correct in predicting his election predict he'll be re-elected in 2 years. He certainly will not hesitate to start a war if that increases his re-election chances.

Whatever you think of this guy, he gets more media coverage than the last 5 guys in his position combined. His outrageous and unbelievable statements are his most effective tool in getting so much attention.

It seems MWSails learned a lot from him. It works great for them. This topic has received more replies than just about any other topic. It pops to the top of the discussion on a regular basis - not just here, but also on other forums.

Why are we still feeding him?

Are you saying MW has a dodgy haircut?
The difference between us and trump supporters is that we can sift through the BS, and we ain't buying it.

The new SPEED 5.6 low aspect

Embracing and encouraging innovation is how we progress forward, sure early days but I feel certain this bloke is onto something for the future and our sport will evolve regardless of the Tall Poppy 'Handbrakes' we encounter in our travels.. Great to see someone spending the time to think outside the NORM!! As for the Politically opinionated- FUTURE PROVES PAST !!.

5.6 Low Aspect? MW spent pages telling us that sailmakers were idiots for not making high aspect sails. What happened? Did his computer models change or did his less than fully developed design collide with reality? Wow, thank you, MW, for figuring out what the rest of us did twenty years ago.

"This is why wing tip on my sail is narrow, wider tip will induce more twist ( all been experimented). On my CFD blog sail is twisted at 20 degrees. I can provide projection from the top to prove it. By the way, i can see that only few people truly understand role of the twist on regular sail , I can explain but ,nah , don't want to inflame another unreasonable flame from my numb nuts critics . And you right , marketing is based on performance , this is why I feel free to slap them a bit. By the way, this is me been very nice."

You gotta buy my newest theoritical design, even though all previous attempts showed huge flaws which never seem to be addressed effectively. Buy my new design, and I will make money at your expense.

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Gestalt said..

sailquik said..
Gestalt. Mate, I like you, but you are Deamin'

hey sailquick, in your opinion, how windy would it need to be to do over 47knots gps.

I'll have a crack at this, 35 kts at the right angle . It got me a 47 2 sec.
At LG I had 30kts going in with a 35 kt kicker at the right time as I started my bearaway. We checked the readings off the BOM site the next day, so its still a bit of a ball park figure. 40 would be good too

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Any sailing recommendations for Light Wind foiling? Love your CFD simulations. I would be particularly interested to see a CFD simulation for 5 knots wind and 8 knots board speed. It is because it feels like the traditional sail is not performing very well when the apparent wind vector is too much collinear to the vector of the board speed. I am experiencing this issue on light wind foiling and fly-fin semifoiling. Board want to go faster but the traditional sail does not allow. Thank you for helping.

Check out the new Ezzy hydra sail, it's designed for foil use only.

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Mastbender said..

Any sailing recommendations for Light Wind foiling? Love your CFD simulations. I would be particularly interested to see a CFD simulation for 5 knots wind and 8 knots board speed. It is because it feels like the traditional sail is not performing very well when the apparent wind vector is too much collinear to the vector of the board speed. I am experiencing this issue on light wind foiling and fly-fin semifoiling. Board want to go faster but the traditional sail does not allow. Thank you for helping.

Check out the new Ezzy hydra sail, it's designed for foil use only.

Too mainstream for XYZ

I have checked this ESSY sail already and noticed several opinions about it on multiple forums. Nobody likes its new shape. Did anyone see any posts from actual customers who bought and used it? I do not normally buy unless I tested it first or someone realistically independent used and commented like one MW Sails customer reported from OBX, NC, USA. I still love EZZY sails despite the sail I have does not go well on higher speed, which I experience now with fly-fin at 8 knots wind. Because fly-fin gets me on 14 knots planing at 8 knots wind my apparent wind angle is very sharp. I need something like a wing in order to generate propulsion force more towards my velocity. It seems to be possible only with thick airfoil like on a wing. MW Sails is the only option out these to deliver.
For these who is interested in the details and how anyone can compare the thin profile of the tradition sail vs thick profile of MW Sail I can recommend to download free program for airfoil calculation.
www.xflr5.tech/xflr5.htm
This program is very easy to use and it runs fast. I think the algorithm is based on penal method, that has been known for over 100 years. You can use the same program in order to compare different hydrofoils. You would need to create a profile of MW Sail and EZZY, and run the calculation to get the CL/CD to compare. I input proximate data just to demonstrate that hick profile like MW Sails delivers better lift/drag ratio compare to thin profile like EZZY. Thick profile keeps high performance at wider range of angles of attack.
Regardless of what others say about MW Sails engineering software tells me that MW is better compare to EZZY. Also, MW has 100% customer satisfaction as we see from this thread. EZZY new sail is still to be earning customer satisfaction. As an engineer I am ignoring unsupported and sometimes derogatory comments of pretending to be the subject matter experts. Based on the reasons above I am going to contact to MW Sails (Sorry EZZY) to ask for a support with my light wind windsurfing.
Perhaps, the new EZZY sail is better for hydrofoiling compare to the traditional EZZY sail. But, I disagree with EZZY designer who claims that the appendix on the bottom reduces the induced drag. Aviation designs show that such of appendix on the leading edge could be an improvement and the trailing needs an undercut. Look at the horizontal tails of airplanes. MW Sails could check it using CFD software. I assume EZZY sails do not have CFD capabilities because they are not showing the prove of their claims.
But, this EZZY invention does not even apply to my setup because I am using fly-fin for more speed, not a hydrofoil. Fly-fin does not lift my board out of water, so I do not have a gap between the sail and water like a foiler has. Traditional (better) methods of closing the gap work better for my setup. EZZY claim improvement of control for foilers. Dos not apply to my setup as well since I am using fly-fin, which is similar to ride as a traditional windsurfer but just gets me on planing at much lighter wind.
I think this EZZY sail is more like a marketing initiative to present something new. Indeed it looks exotic and someone may even buy it just because of its look. I think EZZY wanted to make it look like a revolution. But I do not see a revolution from engineering prospective. It looks like wanna be an aerodynamic expert while they do not even have a CFD simulation to show. (Cost about $2K to get one). My prediction for this sail: to perform a little better compare to other EZZY due to higher aspect ratio and I will not see anyone using it so we will not have reviews. Next year EZZY will probably make this sail look more normal and will keep higher aspect ratio. But I may be mistaken so more experienced experts are welcome to comment.

XYZ, is your website xyzens.com/?

If so, do you stand by your claim on the website that "By the year 2020 it will be impossible to sale traditional sport equipment without sensors."?

If so, let's have a bet. I will bet you $100,000 that by the year 2020, it will still be possible to sell traditional sports equipment without sensors. Are you going to back up your claim that within 18 months, not a single tennis racket, cricket bat, racing bicycle, windsurfer sail, windsurfer foil, baseball bat and gold ball will be sold without sensors?

Come on man, I'm offering you an easy $100,000 here. All you have to do is have faith in your own claims and technological knowledge.

Instead of comparing against the Ezzy which is an outlying radical concept, how about benchmarking against the PROVEN winners. The Severne Hyper Glide or the NP flight or the offerings from Naish?

This is all beyond me but anyone that cant spell "EZZY" when its been around for a long while is a problem.

Soooo.....

Someone else pointed out that XYZ's site has a biography that shows that XYZ is almost certainly the creator of Fly Fins, Dr. Stepan V. Lunin. I should'nt actually call him the "creator" since fins like this have been used in dinghies for years. See the similarities at xyzens.com/about_us and http://frpgear.com/about-us2.html - and thanks to the Seabreezer who pointed this out in a PM.

I checked up further and saw that Stepan V Lunin also claims to make spiral bevel gears - and guess what, there's a guy called Spiralbevel who has posted promoting Fly Fins here, and done no other posts. Spiralbevel also spams Fly Fins on Youtube by pretending to have no connection with the business. Lunin is also known as Zakgear or similar names related to his gear business (www.zakgear.com/) - and guess what, on Youtube there's Fly Fin videos with comments by Zakgear, praising Fly Fins and pretending to have no connection with Fly Fins.

Spiralbevel also turns up on Reddit spamming about Fly Fins, once again writing them as if he had no connection with the business. See www.reddit.com/user/spiralbevel and particularly the bottom post, where Stepan/Spiralbevel says " I checked their web site and they are offering fly-fins for windsurfers. Do not see anything for kite boards. But I would assume that fly-fin idea can be used on any boarding sport. They install large foils an any boards."

It's pretty damming that Stepan, the man behind Fly Fins, repeatedly talks of his own business as "they", which is a clear attempt to pretend that he's not spamming his own product. But because Stepan/XYZ/Spiralbevel/Zakgear isn't very good at keeping track of who he is pretending to be, over on windsportatlanta.com/comment/41606#comment-41606 Spiralbevel admitted he is actually the man behind Fly Fins, and got banned.

So now Stepan/XYZ/Spiralbevel/Zakgear turns up here, referring to Fly Fins as if they had nothing to do with him - see his posts on Friday where he refers to his own business as "they". So XYZ is just someone using multiple identities to try to promote an idea that isn't even his. Bad form. I suppose he won't come up with $100,000 if every bit of sporting equipment has a sensor by 2020, either......

Lol, putting his name into google, linkedin profile came up.