Author Topic: Diy sup foil  (Read 107117 times)

SUPeter

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Re: Diy sup foil
« Reply #675 on: May 10, 2018, 09:48:09 AM »
Its still in the bag but I'm pretty sure the 3 layers of 6 oz glass  and the 3 layers of 3K carbon cloth is going to be enough.  I'll let you know as soon as it cures.

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Re: Diy sup foil
« Reply #676 on: May 10, 2018, 10:59:16 AM »
nice work mate, gotta be the coolest looking construction method out! what are the fibre orientations on the mast? my one has 6x 300g fibreglass double bias wrapped around a 10mm foam core and 6x 200g  carbon unis running the length. its pretty good deflection wise but still has a bit of twist when using the super mega wing, definitely carbon double bias would have solved this

edit- found a core sample from when i shortened the mast height and increased the cord, looks like i added another 3 or 4 layers of unis for a total of ~16 layers. no wonder it wont break!
« Last Edit: May 10, 2018, 11:14:45 AM by container »

SUPeter

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Re: Diy sup foil
« Reply #677 on: May 10, 2018, 11:56:42 AM »
With a good deal of cord lacing of the internal skeleton in all direction(36 cords in all) I was able to achieve considerable stiffness both longitudinally and rotationally.  I usually lay both glass and carbon in 45 and 90 degree orientations.  For this mast I only needed to lay them longitudinally.  Again, I will take it out of the bag when I get out of work. Hopefully it's good and solid and I won't need any more layers.  Let you know later.

SUPeter

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Re: Diy sup foil
« Reply #678 on: May 10, 2018, 04:00:24 PM »
Foil is out of the bag.  Excess is trimmed and I'm satisfied.  Very stiff while supported at each end with my 155 lbs standing on middle.  I am unable to appreciate any twist but I truly will not know until I fashion the adapters to fit the board and fuselage.  Thickness- 14.9mm x 122mm x 68.6 cm.

SUPeter

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Re: Diy sup foil
« Reply #679 on: May 10, 2018, 04:23:33 PM »
Here is a pic of the end I will be embedding into filler to fit tuttle box.  Not very symmetrical atr this point since it will be inside of board.  Just to give you an idea of skin thickness.

SUPeter

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Re: Diy sup foil
« Reply #680 on: May 10, 2018, 04:39:23 PM »
Hi Container,  Just wondering what your mast dimensions are.  Thanks!

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Re: Diy sup foil
« Reply #681 on: May 11, 2018, 11:53:53 AM »
man you can really see the difference vacuum bagging makes to the lam thickness. are you going to make a standard tuttle box fitting? my mast is 115mm x 22mm x 650mm + 80mm for the box fitting

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Re: Diy sup foil
« Reply #682 on: May 11, 2018, 12:12:34 PM »
finally got motivated to put my foil back together after 6 months of gathering dust, just in time for winter here in nz  ???

I didnt like the small curvy tips on the main wing so off they came and on went an extra 440mm of wing span (41 inches now), the shape of them is just to maximize the surface area while still keeping the lines relatively smooth from the existing foil. they are laminated on with just one layer of 400g double bias cloth to give them a bit of flex while pumping. i also reduced the angle of attack on the main foil by about 2-3 degrees so its a bit less draggy while paddling.

the fuselage then got extended by 80mm and turned the rear wing mount upside down to get the wing more into the accelerated flow off the main wing
i must say its pretty incredible how much extra lift and thrust you get from a small increase in wing size!
theres also a new 6'6 sup and a gofoil maliko tail foil mould in the glassing bay but youll have to wait for that
« Last Edit: May 11, 2018, 12:16:50 PM by container »

kiwi

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Re: Diy sup foil
« Reply #683 on: May 11, 2018, 02:25:21 PM »
Such a small world we live in, didn't realise you lived so close container, I recognise the esplanade in the background of one of your photos.
I live in manly too, also trying to build a foil with much less success than your's.

Seriously cool that on a small global forum I find someone who lives in the same area  ;D

SUPeter

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Re: Diy sup foil
« Reply #684 on: May 13, 2018, 01:16:22 PM »
41 inch wing span! Crazy wide.  Do you notice increased torque against your feet from side to side.  I just might have to try a wing with increased span.  The Maliko ,I believe, is 32 inches and I thought that was really wide.  my first wing was 28 inches.  My new wings are 25 inches wide.  I have found that most of my foils for SUP end up being too fast and I'm now looking for ways to slow them down.  a speed that more closely matches the speed of the wave would be easier to keep in the correct position on the wave. More likely it is probably due to my lack of ability.  Its all fun anyway. 

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Re: Diy sup foil
« Reply #685 on: May 15, 2018, 11:39:22 AM »
you will have to come out for a session with us one day kiwi!
 supeter yup 41 inches is crazy hard to turn when you dont have a tow line in your hands to lever off. i think its more to do with the sweep angle of the wing though, the tips are pretty much behind the mast.
slowing them down is easy, thicker wings! they are also alot more forgiving when it comes to pitch angle and speed (or lack of)
heres a little clip from my first day on the big wing. not sure where my balance went at the end of the run, probably the same magical land where all the video quality went  ::)

 <iframe src="https://player.vimeo.com/video/269926702" width="640" height="356" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>
<p><a href="">flight</a> from <a href="https://vimeo.com/user62288090">Jordan Harkin</a> on <a href="https://vimeo.com">Vimeo</a>.</p>

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Re: Diy sup foil
« Reply #686 on: May 16, 2018, 01:01:01 PM »
bugger

surfcowboy

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Re: Diy sup foil
« Reply #687 on: May 16, 2018, 09:37:36 PM »
Nooooooo!!!

Newps

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Re: Diy sup foil
« Reply #688 on: May 17, 2018, 04:02:10 PM »
Welcome to the world of foiling.  Break..repair...break...repair....and repeat...:0.
L41 SIMSUP S4 - 7'4" x 30 1/4" x 4 1/2" 112L
L41 SIMSUP S5 - 7'6" x 27 1/2" x 4 3/16" 106L
L41 SIMSUP S4 - 7'8" x 31"x 4 1/2" 122L - Modded w/ a King's TUT Tuttle box and using a King's foil.
L41 SIMSUP S4 - 7'10" x 30 1/4" x 4 1/2" 120L

SUPeter

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Re: Diy sup foil
« Reply #689 on: May 17, 2018, 05:29:44 PM »
Great video!  Nice bit of pumping!  Looks very efficient.  I had to put 2 extra layers of 45 degree 3K carbon on the mast.  Very stiff but had a little too much twist.  All is good now and needed to cover the fairing from mast to insert portions anyway.  Looking forward to getting the short mast on the local river wave and also think it will make ocean wave foiling a fair bit easier.