Those Aluminium moulds and the finish on the wings look awesome! Great result. I've been thinking about switching over to a rigid plastic myself (like a PVC), but its silly expensive compared to wood. Will have to keep on looking.robke wrote: ↑Mon Nov 30, 2020 7:21 pmExcellent PrfctChaos ! So not too bad actually with H105 profile.
My weight is probably around 90kg with the gear on, but I'm pretty sure the pressure on the foil varies between 0-130kg when kiting .
I would definitely like to try a thinner profile for my next wing. The h105 is around 12% max thickness vs NACA with 5% ( much less aluminum for a mold )
Probably that's why it looks a bit better at low end.
My idea for the fast wing is pretty similar to what you plan on making 800-900 in area, and span of 750 seems reasonable. I would prefer something a bit thicker than 5% for hollow/pu filled composite wings, maybe in 7-8% range for sake of stiffness and rigidity.
At 5% thickness and 150mm center chord it's only 7.5 mm thick which sounds like it should be made of solid carbon/glass. Thou i could mill the wing from 10 mm aluminum and just go test ride it. That would take a day or two and almost no manual labor. That actually sounds like good game plan. Will think about it for a bit before I begin.
What is the race wing you have PrfctChaos ? would like to try one these as well The whole idea with making my own was to learn and try different wings, stabs, mast lengths etc. There wasn't that much info on web when I made my first foil, around 3 years ago (which got me 11 stitches on my palm). It was a very exciting process making the equipment and learning to kitefoil.
I'm sure your wings go really well. Another profile could've maybe just helped to push the top speeds a bit. I have spend a bit of time on the similar Neil pryde surf wings myself, they do turn really well.
Here are some updated results for 90Kg, and only considering profiles with at least 7% thickness. Just for interest and to show how it effects results.
MH23 comes up top for balanced criteria and MH30 for low end biased criteria. H105 does similar to to the MH30, but just a bit more drag. 1600 wing:
MH30 comes up top for balanced criteria and NACA2407 for low end biased criteria. H105 does similar to to the NACA2407, but just a bit more drag. I haven't made myself any race wings yet, just the pretty fast one shown on page 1 of the thread. It goes really well, but its still about 20%-30% larger than most race wings. The race wing I take out often on flat water is a KFA Mako2. And sometimes a Tarroa sword 2. Both were cheap as chips, since they are previous generation race gear (so not much use to the racers anymore), but the quality of the carbon masts and everything is top notch. I usually have a DIY freeride wing fitted to the Tarroa mast and stab, thats the setup I use most often on flat water. Still want to try my hand at a top speed wing, but will then need to start looking at a few more detailed design methods to push that envelope.
Will add some calcs for your +7% thickness freeride wind in a bit.