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Messages - jamallstar

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1
Foil SUP / Re: Yet another diy wing
« on: November 26, 2019, 09:28:02 AM »
Cheers jeg, Its 1180mm x 200 x maybe 30mm, not the smallest wing but pretty high aspect.
I have a maliko tail for this foil, chopped about 70mm off each tip. I havent really tried it surfing since the chop but downwinding it is faster and  alot looser to turn but also lost alot of pumping power. I would just buy a new tail wing if it were me

This is my second  session on the gull, still cant quite figure out the pumping cadence  it feels alot different to anything ive tried so far. Seems to really like short sharp pumps



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Foil SUP / Re: Yet another diy wing
« on: November 25, 2019, 08:06:06 AM »
Trying out her carve ability

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Foil SUP / Re: Yet another diy wing
« on: November 25, 2019, 08:03:15 AM »
And the (sort of) finished product. I made the fuselage a few months ago with an axis front wing mount for accurate comparisons.
The gull wing is super easy to flat water sup start, easier than the axis 102 and much easier than the axis 1000 high aspect to get going, fairly similar once up and pumping to the 1000, maybe a little bit slower owing to its size and leading edge shape but it turns like a wing half its size.
Few pics from my second dock start session on it. Ive got the tail wing at zero right now but ill try a few different angles later in the week when we get some onshore breeze for upwind/downwindera


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4
Foil SUP / Re: Yet another diy wing
« on: November 16, 2019, 08:42:44 PM »
Cheers surfcowboy, I cant wait. So tempting to throw it in the water before paint

Kiwi theres 2x  3 or 400g DB patches 200mm square + 2x 200g twill on the top, and the same on the bottom but with a layer of 300g unis on the 45* and a 100mm strip about 3/4 of the span. Feels pretty stiff

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Foil SUP / Re: Yet another diy wing
« on: November 16, 2019, 11:55:34 AM »
Total weight so far is 1085 grams. Not bad!

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Foil SUP / Re: Yet another diy wing
« on: November 16, 2019, 11:46:03 AM »
-

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Foil SUP / Re: Yet another diy wing
« on: November 16, 2019, 11:44:32 AM »
Shes coming along nicely now, got the bottom laminated -
 2x 300g DB patches over the mounting plate, 1 strip 300g unis spanning 3/4 of the wing, 1x 300g unis at 45 degrees and 2x 200g twill over the whole lot.

Once that was dry i dug out the leading edge and filled it with some individual strips of unis and then bog.

Next i filled in the trailing edge and wing tips where i had dug all the foam out before laminating to get carbon on carbon contact, now the fun part. Sand it all!



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Foil SUP / Re: Yet another diy wing
« on: November 13, 2019, 01:28:55 PM »
It does bear some resemblance!

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Foil SUP / Re: Yet another diy wing
« on: November 11, 2019, 09:47:46 AM »
More sanding. Dug out the foam in the trailing edge and tips as these will be solid carbon. Did a 200mm square rebate in the centre for 2 layers of bi ax reinforcing over the mounting plate. Was thinking about a little trench running the full span to fill with unis to form a spar but im not sure if it will need it or not

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Foil SUP / Re: Yet another diy wing
« on: November 09, 2019, 02:18:04 PM »
I agree with supeter, having seen various racing yacht foils up close, from moths to volvo70 canards and gc32 foils, the bigger and faster the boat the closer to that h105   section the foils become. You can see it here on the 100' trimaran macif

Ive finally got around to shaping the underside of the gull wing. Not quite there yet but not far off, next will be rebates for uni reinforcing.

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The Shape Shack / Re: Bottom shape to help track straight
« on: October 29, 2019, 12:13:33 PM »
Call me a sailor but concaves in the bottom of hulls (boards) is nothing but drag, it may help with stability but your foil hanging off the bottom will do that.
I did a 5' 10" x 26 board with large concave rails, effectively making a "stabilized short board" on take off and touch down. In my opinion its fantastic, super easy to paddle and tracks better than my old 6' 10 which had a kalama style under side with a canard fin up front, even in flat water take offs and my long upwind paddles into onshore breezes for micro downwinders.
I will definitely be doing this again on my next board

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Foil SUP / Re: Tri and Bi Rear Wing Configurations
« on: October 29, 2019, 11:45:03 AM »
That looks.. different! Are they all providing down force? Try flipping them over so they also provide lift, i found it very easy to get flat water foiling with this set up even if it did feel odd under foot.
I just put a new low slung tail wing mount on my fuse, have been meaning to try a biplane setup just to see "why"
If not us, who else?

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Foil SUP / Re: Yet another diy wing
« on: October 17, 2019, 10:06:33 AM »
Well i must be a genius then wetstuff
 i have made 5 wings prior to this, all designed and shaped by eye and 2 of which i can flat water start on the sup which is no easy feat, i think this one will turn out just fine

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Foil SUP / Re: Yet another diy wing
« on: October 16, 2019, 12:00:17 PM »
I cant remember what the numbers are, i dont really pay attention to that anyway i just do what i think looks right.
Here is the drawing for the polystyrene tips, but that is only a core so the finished dimensions will be slightly bigger. Not sure if i will keep the concave on the top surface yet, well see how it looks when shes all laminated and faired up

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Foil SUP / Yet another diy wing
« on: October 15, 2019, 09:40:43 AM »
Some progress pics of my new extra large high aspect gull wing. Its intended for sup downwinding  in 10kts wind to 50+. 1180mm span for easy lift off but a thin foil section and custom (hopefully) aerofoil with all the qualities that i like and none that i dont .. ha.

Centre section is high density foam with the outboard sections polystyrene.

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