## Search found 234 matches

Wed Sep 27, 2017 11:58 pm
Forum: Hydrofoil
Topic: Importance of wing AR?
Replies: 23
Views: 2662

### Re: Importance of wing AR?

Thanks everyone for the replies. I did search a bit more and found the missing piece in the puzzle: sweep! https://aviation.stackexchange.com/questions/22757/what-is-the-reason-for-the-poor-low-speed-characteristics-of-sweptback-wings Just like lowering the AR, increasing the sweep decreases the sen...
Tue Sep 26, 2017 9:07 pm
Forum: Hydrofoil
Topic: Importance of wing AR?
Replies: 23
Views: 2662

### Importance of wing AR?

Hello, Having bought one of these chinese hydrofoils (aspect ratio=6) i was planning to build a more begginer friendly set of wings . But before starting the construction, i did some quick math and found that the difference in the lift slope between a high and low (3.5?) AR wing is at most 20%. in o...
Fri Apr 27, 2012 9:22 pm
Forum: Kitesurfing
Topic: MOST SEXY KITE PICTURE
Replies: 6117
Views: 4073640

### Re: MOST SEXY KITE PICTURE

looks like justin bieber
Mon Apr 23, 2012 8:26 pm
Forum: Kitesurfing
Topic: MOST SEXY KITE PICTURE
Replies: 6117
Views: 4073640

### Re: MOST SEXY KITE PICTURE

back to front page!
Thu Dec 15, 2011 11:04 pm
Forum: Kitesurfing
Topic: MOST SEXY KITE PICTURE
Replies: 6117
Views: 4073640

### Re: MOST SEXY KITE PICTURE

i think i saw this pic before but not with this quality.
anyway, i think noone will complain..
Mon Oct 24, 2011 7:24 pm
Forum: Kitesurfing
Topic: any math/science people?
Replies: 55
Views: 3970

### Re: any math/science people?

Also about the physics, I really do not agree with Peter's energy theorem because kinetic energy is speed at surface perpendicular (90 degrees) to potential energy. So for kinetic energy velocity vector you need to redirect that upwards. Velocity change is done by acceleration, acceleration is forc...
Mon Jun 06, 2011 8:54 pm
Forum: Kitesurfing
Topic: This is really high!
Replies: 8
Views: 1836

### Re: This is really high!

toby, what was the name of that girl who broke her spine while "playing" a game like this?
Sun May 15, 2011 11:42 pm
Forum: Board Builders
Replies: 8
Views: 2252

you should look for hydrofoil sections, that way you'll delay the cavitation if you're building a raceboard where lift is really needed. but if your board is just a standard tt i wouldnt spend too much on fins, imo cheap plastic fins do the job just fine.
Thu May 12, 2011 10:10 pm
Forum: Board Builders
Topic: A Big Door - 166x50
Replies: 7
Views: 3055

### Re: A Big Door - 166x50

why did you cut it into strips?
Sun May 08, 2011 9:19 pm
Forum: Kitesurfing
Topic: Finally an event with decent prizemoney!
Replies: 3
Views: 720

### Re: Finally an event with decent prizemoney!

no no!, it's just a trick,the "word ammount" and the "number ammount" differ so actually he gets nothing :p