Author Topic: guys wanna see what the GoFoil NL220 is capable of?  (Read 3724 times)

blueplanetsurf

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Re: guys wanna see what the GoFoil NL220 is capable of?
« Reply #30 on: September 03, 2020, 03:45:54 PM »
Only thing I don't agree with: you said the shiny, glossy surface of the wing has less drag and extends the laminar flow better than a sanded surface.  My understanding is that a non-glossy/ matt surface actually promotes laminar flow better than a glossy surface, although I doubt you would notice the difference.
Robert Stehlik
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steamroller

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Re: guys wanna see what the GoFoil NL220 is capable of?
« Reply #31 on: September 04, 2020, 11:36:25 AM »
i have heard this and read the literature too...don't know what the answer is...asked a friend who designs those RedBull AirRace airplanes why they are all shiny and sleek if he had seen the papers on the textured surfaces...he had but they still make um smooth...

BUT

the SR71 hypersonic 7000mph airplane is parked ..right outside my work and THAT guy has a sanded finish!...might be because its been sitting out there for 20 years though too...


Beasho

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Re: guys wanna see what the GoFoil NL220 is capable of?
« Reply #32 on: September 04, 2020, 02:16:02 PM »
Back in the days of windsurfing the fastest finish on fins was a 400 grit sanding.

It had something to do with SLOWING down the flow at the boundary layer and the subsequent layers would shear up to the freestream.  If flow got too fast at the boundary there could be separation.  Separation caused higher drag than the shear between the layers. 

steamroller

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Re: guys wanna see what the GoFoil NL220 is capable of?
« Reply #33 on: September 04, 2020, 04:38:53 PM »
see i remember THIS!...i got one of the very first of the Windsurfing Hawaii White Lite slalom boards...used of course...and the bottom had a sanded finish too ;D

steamroller

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Re: guys wanna see what the GoFoil NL220 is capable of?
« Reply #34 on: September 11, 2020, 07:02:45 PM »
Blaaaaaaah...this one is even FURTHEr away from the cam... but thats all the video i got...sorry

Carving360!...


https://youtu.be/rIlWGSv5Oew


steamroller

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Re: guys wanna see what the GoFoil NL220 is capable of?
« Reply #35 on: September 15, 2020, 11:04:43 PM »
Sealevel view 360! ;D


https://youtu.be/kn4R93IizHo


jondrums

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Re: guys wanna see what the GoFoil NL220 is capable of?
« Reply #36 on: September 16, 2020, 10:23:34 AM »
nice one!  where's that???

steamroller

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Re: guys wanna see what the GoFoil NL220 is capable of?
« Reply #37 on: September 16, 2020, 11:38:49 AM »
Sealbeach jetty...socal ;D

supfoo

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Re: guys wanna see what the GoFoil NL220 is capable of?
« Reply #38 on: September 20, 2020, 05:36:49 PM »
Steamroller, are you on the short pedestal?

steamroller

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Re: guys wanna see what the GoFoil NL220 is capable of?
« Reply #39 on: September 20, 2020, 06:47:57 PM »
yup ...6.5 pedestal... 18w tail with the wingtips...NL220 wing...and the 36.5 mast with the base plate adapter...

the mast is a bit too tall for small waves...the wing ends up being below the power of the swell in anything below waist high...and the turning radius is wider compared to a shorter mast...i would've preferred the 29.5tuttle with the base plate adapter or the simply the 32.5 plate mast...

 


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