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by Europ2
Mon May 11, 2020 11:26 pm
Forum: Hydrofoil
Topic: Gong veloce wings
Replies: 23
Views: 1862

Re: Gong veloce wings

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 ...
by Europ2
Tue Apr 07, 2020 1:21 am
Forum: Hydrofoil
Topic: Surf/wave wing thickness and NACA profiles
Replies: 76
Views: 5920

Re: Surf/wave wing thickness and NACA profiles

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...
by Europ2
Sat Apr 04, 2020 10:59 pm
Forum: Hydrofoil
Topic: Surf/wave wing thickness and NACA profiles
Replies: 76
Views: 5920

Re: Surf/wave wing thickness and NACA profiles

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...
by Europ2
Fri Apr 03, 2020 1:01 am
Forum: Gear Builders
Topic: Efoil convertibile in Esurf
Replies: 3
Views: 324

Re: Efoil convertibile in Esurf

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 ?
by Europ2
Mon Mar 30, 2020 9:36 pm
Forum: Gear Builders
Topic: Way to extend foil mast 8cm by adding something between board and mast?
Replies: 5
Views: 404

Re: Way to extend foil mast 8cm by adding something between board and mast?

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...
by Europ2
Tue Mar 24, 2020 3:32 pm
Forum: Hydrofoil
Topic: Surf/wave wing thickness and NACA profiles
Replies: 76
Views: 5920

Re: Surf/wave wing thickness and NACA profiles

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...
by Europ2
Sun Mar 22, 2020 3:28 am
Forum: Kitesurfing
Topic: Free kite plans on GitHub
Replies: 273
Views: 53918

Re: Free kite plans on GitHub

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...
by Europ2
Fri Mar 06, 2020 2:14 am
Forum: Hydrofoil
Topic: How to make a KF Box board compatible with 4 bolt hydrofoil?
Replies: 8
Views: 562

Re: How to make a KF Box board compatible with 4 bolt hydrofoil?

The easiest way would probably to buy the KFbox head matching the mast of the same brand because of the mast screw spacing. If you live outside Europe, for export the gong set (90cm mast + KFbox head) in USD would cost (79 + 39) x 1.15 /1.2 = 113USD + shipping Then you have to adapt a plane : either...
by Europ2
Mon Feb 17, 2020 3:01 am
Forum: Gear Builders
Topic: Swap Gong Allvator & Moses Fluente
Replies: 28
Views: 6141

Re: Swap Gong Allvator & Moses Fluente

Have they abandoned the idea of carbon struts completely? The line-up of foils makes perfect sense to me. The concept seems to be based on the Go-Foil design. Their commitment to a comprehensive product line is impressive - assuming the quality is there. The light carbon version of strut + mast wil...
by Europ2
Mon Feb 17, 2020 2:35 am
Forum: Gear Builders
Topic: Swap Gong Allvator & Moses Fluente
Replies: 28
Views: 6141

Re: Swap Gong Allvator & Moses Fluente

What is the screw spacing in the slot of the Moses Carbon fuselage ? I suppose the gong fuselage screw spacing had to be be aligned onto this dimension. What is the screw spacing in the slot of the Gong fuselage before the modification ? I want to know if the gong fuselage had to be redrilled to Mos...

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