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by high123
Wed Aug 25, 2010 9:22 am
Forum: Kitesurfing
Topic: How high is it possible to jump with a kite ?
Replies: 100
Views: 11586

Re: How high is it possible to jump with a kite ?

Looking at "peets" calculations I couldn't resist to do a calculation, too. This one is about lofting and also more about the theoretical limit therefore I neglected body and line drag and only considered kite drag via a constant value for L/D. I hope I got the numerics right, let me know if you fin...
by high123
Wed Aug 25, 2010 8:39 am
Forum: Kitesurfing
Topic: How high is it possible to jump with a kite ?
Replies: 100
Views: 11586

Re: How high is it possible to jump with a kite ?

...just continuing why the formula given at the beginning of this thread does not describe lofting, see also my message on page 8. Key points: 1) A flying wing has an impact on the air molecules near the kite. Any formulas that do not include this in some way are not describing the whole problem. A ...
by high123
Sun Aug 22, 2010 8:39 am
Forum: Kitesurfing
Topic: How high is it possible to jump with a kite ?
Replies: 100
Views: 11586

Re: How high is it possible to jump with a kite ?

But you can't have insignificant drag with significant lift. I thought I explained it well, you need a very large L/D: Lift divided by a very, very small (=insignificant) value for drag = very large L/D. Any theory that goes against the conservation of energy is flawed Of course. But getting lofted...
by high123
Sat Aug 21, 2010 7:17 pm
Forum: Kitesurfing
Topic: How high is it possible to jump with a kite ?
Replies: 100
Views: 11586

Re: How high is it possible to jump with a kite ?

No drag means no lift dude. Yes for a real kite but not for an ideal kite. If it's easier to understand start with a kite that has an L/D of 6 (typical for a kite surfing kite). Now increase the L/D to 60 like the very best gliders. So at a given lift the drag is much smaller. Keep going and make t...
by high123
Sat Aug 21, 2010 10:03 am
Forum: Kitesurfing
Topic: How high is it possible to jump with a kite ?
Replies: 100
Views: 11586

Re: How high is it possible to jump with a kite ?

With an ideal kite (no drag) you can fly as high and you want and stay up there as long as you want (as long as you can tolerate the low temperatures and you don't need to pee...) And I don't buy the assumption that the kinetic energy converted to potential energy is derived from the apparent wind, ...
by high123
Tue Nov 27, 2007 8:38 am
Forum: Kitesurfing
Topic: Hook Knives...don't bet your life on them!
Replies: 162
Views: 31904

What really helps in salt water is to cover the blades with a thick layer of high viscosity grease. Then wrap one layer of very thin plastic wrap/food wrap around it so you don't create a mess when you put the knife into the pouch. FYI ... I used winch grease. Is that some kind of sexual thing? :-)...
by high123
Sun Nov 25, 2007 10:40 am
Forum: Kitesurfing
Topic: Hook Knives...don't bet your life on them!
Replies: 162
Views: 31904

FYI ... I used winch grease.
by high123
Sun Nov 25, 2007 9:58 am
Forum: Kitesurfing
Topic: Hook Knives...don't bet your life on them!
Replies: 162
Views: 31904

What really helps in salt water is to cover the blades with a thick layer of high viscosity grease. Then wrap one layer of very thin plastic wrap/food wrap around it so you don't create a mess when you put the knife into the pouch. Obviously you don't need to pull off the plastic wrap before using t...
by high123
Wed Nov 21, 2007 9:31 pm
Forum: Kitesurfing
Topic: Second Hand - forum?
Replies: 11
Views: 892

Toby: Maybe you should add an advanced search screen like this one: http://www.ikitesurf.com/buysell/classifieds.pl?db=kiteboards&website=&language=&session_key=&advanced_search_button=on This is one of my bookmarks. Then the user doesn't have to waste his/her time to load the first page where no se...
by high123
Sat Oct 27, 2007 5:53 am
Forum: Kitesurfing
Topic: NEW Naish website!
Replies: 6
Views: 1100

They obviously changed their business model quite a bit...

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