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by dirk8037
Fri Oct 02, 2020 10:14 pm
Forum: Gear Builders
Topic: Wing profile info for backyard hydrofoil builders
Replies: 68
Views: 3600

Re: Wing profile info for backyard hydrofoil builders

Hi, seeing the graphs first thing that shot through my mind was that it prooved what I read before, that plane surffaces on a wing are super ineffciant.I always wondered if that flat surf fins are just because fo the cheapness of shaper and industry ...anyway. What stroke me, too, is how close the p...
by dirk8037
Sat Sep 19, 2020 8:43 pm
Forum: Gear Builders
Topic: Open Fuse
Replies: 39
Views: 1992

Re: Open Fuse

Hi, Does the printed core will have in your calculation take any statical load? I wonder what you want to use for the print, since all the for mortal accessable filaments seems to me too week. Also the bond between composite and print is a thing that, from what I know, none of them do realy do that....
by dirk8037
Thu Sep 17, 2020 10:04 pm
Forum: Gear Builders
Topic: Open Fuse
Replies: 39
Views: 1992

Re: Open Fuse

Hi, this is not from me. i basically had that in my mind for the same reason you opened this here. Got an Alpine Access but the mast is already to wobbly, the fuse a bit too lethal and bigger wing sizes more tailored for tiny french (want a Wing&pumpfoil on the same rig for 90kg). So same thoughts o...
by dirk8037
Wed Sep 09, 2020 11:19 pm
Forum: Gear Builders
Topic: Wrinkles, WTF
Replies: 31
Views: 1662

Re: Wrinkles, WTF

Very nice. Why did you mill away some foam round the insert bases? What I many time did wrong was to be too tight with resin and to aply too much pressure with the squee gee. It happend than that the cloth lost contact to the blan at uneven places (esp with handshaped surfboards) and it kind of rebo...
by dirk8037
Sun Sep 06, 2020 11:47 pm
Forum: Gear Builders
Topic: Wrinkles, WTF
Replies: 31
Views: 1662

Re: Wrinkles, WTF

>>>The vac bag should have quite big "foldings" to compensate for bridging etc.<<< I agree with that. The evenly streched bag caused for me in the past quite a lot of bubbles of trapped air because the surface had slight dents. I also agree that its excess resin. Peelply helps to a certain part but ...
by dirk8037
Thu Sep 03, 2020 10:22 pm
Forum: Kitesurfing
Topic: 3D Printing Advices
Replies: 7
Views: 438

Re: 3D Printing Advices

I fully agree with JF I bought a year ago out of curiosity a Ender 3D. 185.- does not hurt. Voice said its still good quality for low price, good comunity, lots of mods.. Since I was not sure if it really makes sence, so I did not want to jump into serious investment of a Prousa. I have no engineeri...
by dirk8037
Thu Sep 03, 2020 9:02 pm
Forum: Gear Builders
Topic: Vacuum Bag and Hard But Not Cured Resin
Replies: 5
Views: 537

Re: Vacuum Bag and Hard But Not Cured Resin

Hi, I guess in a day might be a bit tight. But ther are some resins that cure very fast and are, at least thats what they say, not stick anymore after 4-5 h. Check Resin Research eg at Greenlight Surfsuply or Sicomin Superfast . Prof. Surfboard builders like to have shor processes and dont want to w...
by dirk8037
Fri Aug 28, 2020 9:16 pm
Forum: Gear Builders
Topic: Stringer in small foilbord?
Replies: 29
Views: 2136

Re: Stringer in small foilbord?

As most said, I am also convinced that it is not necessary. I think tha even the layer setup of most is exagertated if you put patches wisely. See the Gong Flint setup - Sandwich with 80gr glass inside and 200gr Carbon outside. The power distribution from the Mast is essential. I guess a broad conne...
by dirk8037
Fri Aug 28, 2020 8:33 pm
Forum: Wingsurfing
Topic: Inflatable Boards for Winging
Replies: 48
Views: 5353

Re: Inflatable Boards for Winging

Hi Gunnar

with the posted range of 44L, 71l, 103L, 144L and 157L I wonder where the 120 somthing L is.
With 90kg naked, 103 seems tight and 144 almost to much. It does not seem to be very even.
Are there any changes in wight ?

Cheers Dirk

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