Author Topic: Diy sup foil  (Read 115323 times)

SUPeter

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Re: Diy sup foil
« Reply #690 on: May 18, 2018, 04:37:22 PM »
Forgot to ask you, Container.  Could you please tell me more about the foil with the Leading Edge Protuberances.  Is it a prototype  and how did it work?  Looks really cool.  Could be just the ticket for decreasing speed(increased drag) and inhibiting stall.

container

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Re: Diy sup foil
« Reply #691 on: May 24, 2018, 11:25:56 AM »
its ok, great in the surf because of the 'M' curve in the wing and the extra weight of the plywood core but the bumps are proving quite hard to get right, the key to a good whale fin is its natural unfairness which im finding extremely hard to shape so i am just going to give up and fill them in

SUPeter

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Re: Diy sup foil
« Reply #692 on: August 09, 2018, 08:14:52 AM »
Got a start on the new extra large rear wing.  I'm hoping it helps with pumping.  22" wide. 3.5" front to back, tapered.  GOE 180 wing profile.  Good thing waves in the east only come sporadically.  Id never have time for all these projects.

SUPeter

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Re: Diy sup foil
« Reply #693 on: August 09, 2018, 08:16:24 AM »
After lacing.

surfcowboy

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Re: Diy sup foil
« Reply #694 on: August 09, 2018, 08:07:24 PM »
Im still fascinated by this construction technique. I really have to see some footage of these flying. I know in my head it should be strong but it just seems crazy that it works.

We need a full build thread and video on these things. I have way too many questions for the occasional post.

SUPeter

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Re: Diy sup foil
« Reply #695 on: August 10, 2018, 10:47:08 AM »
A little too busy as of late but when all my projects are complete I'll try to make a video or something .  At least a walk through with photos.  All I can say is the strength of both lift wing and stabilizer has impressed me.  The more cords one uses in as many vector directions as possible, the better.  With thin wings like the stabilizers I fill with a mix of milled fibers and micro-balloons . I then cover these with 2 layers of glass and two layers of carbon(45 and 90 degrees).  If you noticed, the wing in photos will be flown tips pointed up.  I,ve just laced another wing of the same size and dimensions with wings angling down.  Experimenting with a rear stabilizer that aerates prior to main wing thereby causing the front wing to descend automatically.  I did this some time ago and had a fair bit of luck.   Probably only to be used downwinding.
« Last Edit: August 10, 2018, 10:50:19 AM by SUPeter »