bay surfer wrote: ↑

Thu Jul 09, 2020 12:15 am

Little wing and its big brother.

Nice. What airfoil section have you used ?

platslagarn wrote: ↑

Wed Jul 15, 2020 7:22 pm

I think it's fun to try things. so we'll see where this leads me.

Hey Platslagarn, how are you doing with this project ? Any interesting Pros and cons to highlight ?

Someone could still come forward with prior artwork to mine, but it hasn't happened. You don't have to regret anything. You published your drawing late 2014. Published 2015/04, the Langelaan (Lift based) patent has a priority from 2013/10. It was granted despite the Evolo project prior art from 200...

I have the original Gong 712cm2 wing, never used. It is very thin too, so kind of a Veloce small. Maybe I should try it now when fast wings are hot again! My wings will be a nice little quiver. Fast Original 712cm2 Medium Surf pro M 1100 Slow Surf M (Lift)1500 @AndersP or anyone owning a Gong Kite ...

I read that Xfoil in XFLR5 was locked at 1M Re, ie you cannot get your plots at other speeds. However, It would be nice to vary the test speed like 400K and 700k Reynolds to see how the profile behave with increasing speed. Do you have any experience comparing results XFLR/CFD/experimental? I have f...

Just to say that in a airfoil section comparison, the chosen max Reynolds (Re) number should depend on the max speed of the program. For example, for an elliptical wing with a 10cm max chord, 10°C salt water, the Re is as follows: Surf/wave practice: speed range 10-15 knots, Re range: 310 to 465k Fr...

Congratulations. Two questions though:
1- At startup, is the board self priming ? Is the electric engine OK to vacuum all this water along the mast to build speed up ?
2- What's the max speed you've reached so far in jetsurf AND in jetfoil version ?

I haven't tested but yes it should be possible !! In which material is your existing mast ? You could try a "mini me" :wink: : screw a flipped alu plate on your existing one + an 8-20cm alu mast (cut to exact length and re-threaded)... with plate on the board side ! 90 x 165 alu plates cost 25-30 us...

my latest wing 5% thickness, n-10 profile, ar 3, 600x200mm , ~900cm2 low speed is very good, top speed is good (depends on stab) what is different? feels like wing cutting the water like a knife, very smooth riding in the waves I wouldn't have thought that one could go as low as 5% ? Which fiber (C...

Hello VP22: Make your bladders out of PE/PA/EVOH/PA/PE film. Half the weight of TPU, heat sealable and strong. Just make sure they fit your tubes and slightly larger. You can also use PE/PA/PE food preservation film. Super light and cheap. Cheers! Would you have a link for the PE/PA/EVOH/PA/PE film...