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Downwind for Dummies - a basic kite surfing theory

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Klaus (c:E
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Downwind for Dummies - a basic kite surfing theory

Postby Klaus (c:E » Sat Jul 15, 2006 11:13 pm

Hai,

it has been more work that i have expected it to be, but there we are:

Image
(The picture is a link. Click it)

We had a lot of fun in the "most sexy downwind prop-missile pilot" thread: how can we ride 40-50 mph in only 20-25 mph of wind?

BTW: I have deleted the preliminary version linked to in: Wind and Current in same direction. Getting out??.
There had been several hundreds of downloads but my traffic limit allowes for this 8).

P.S.: I had fun writing this basic kitesurfing theory and i did it most of all for the sake of safety. Understanding what You do helps with Your risc assessment.

Sea You: Klaus (c:E

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Postby waker » Sun Jul 16, 2006 7:54 am

Thanks for attention.
Last edited by waker on Mon Sep 01, 2008 2:16 pm, edited 1 time in total.

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Re: Downwind for Dummies - a basic kite surfing theory

Postby waker » Sun Jul 16, 2006 8:21 am

.

Thanks!!!
Last edited by waker on Mon Sep 01, 2008 2:16 pm, edited 1 time in total.

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bondo
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Postby bondo » Sun Jul 16, 2006 9:50 am

waker - it seems you misspelt your user name... its normally spelt with an "n" before the k.

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4T
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Postby 4T » Sun Jul 16, 2006 10:27 am

bondo wrote:waker - it seems you misspelt your user name... its normally spelt with an "n" before the k.
you took the words out of my mouth...

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Klaus (c:E
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Postby Klaus (c:E » Sun Jul 16, 2006 5:16 pm

Hai,

Waker and i had some correspondence already. Waker sending me 26 mails, me replying in 13 mails. So i´m tired of that already.

Please refer to Stephen Bourne´s work on a Hydrofoil Sail Craft here.
Especially the background referring to Australian and U.S. patents and Stephen Bourne´s technical paper may be intesting to compare. He presented the same theory with one more point of special interest but what was missing in Stephen´s work are most of the mathematical proofs, the kite specific and dynamic aspects.

Sea You: Klaus (c:E

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Postby waker » Sun Jul 16, 2006 9:57 pm

do you've got a job Klaus?? Would be interesting to know who would pay you for that kind of work.

Nice UFO-Link... :bye:
(revolutionary proof: photos and videos..)

Shut up or bring money in.

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Postby 4T » Sun Jul 16, 2006 10:19 pm

waker wrote:do you've got a job Klaus?? Would be interesting to know who would pay you for that kind of work.

Nice UFO-Link... :bye:
(revolutionary proof: photos and videos..)

Shut up or bring money in.
in case no one has noticed yet...

TROLL ALERT!!!!

The only way to deal with trolls is to limit your reaction to reminding others not to respond to trolls.

in case you don't know what a troll is:
http://curezone.com/forums/troll.asp

:bye:

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Postby waker » Sun Feb 18, 2007 10:50 pm

The truth of your concept is in fact, you tried to find a state with vmg rate >1
If you ARE at vmg rate >1 this works in absence of any resistance, but you can never get there because you work with negative angels unless vmg can rise (e > 45°).
A negative angel is not possible in geometrics.
Last edited by waker on Mon Sep 01, 2008 2:18 pm, edited 2 times in total.

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Klaus (c:E
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Postby Klaus (c:E » Mon Feb 19, 2007 12:17 am

Hai,

now this is getting really funny or ridiculous.
waker wrote:A negative angel is not possible in geometrics.
i recommend everyone look at "Inverse trigonometric function" on wikipedia.org
You find arcsine defined for angles in the interval -π/2 ≤ y ≤ π/2.
Or see any standard book on mathematics: sin(-alpha) = - sin(alpha). For every alpha ≠ 0 one of the arguments must be a negative angle.
waker wrote:I recommend you to keep away from me at any spot if you don't want to learn my basic concept of physics....
How shall i put this - a threat?

There have been several hundreds (maybe in thousands by now but i don´t look up my statistics too often) of downloads of Downwind for Dummies and only one single person with negative feedback: "waker".

Sea You: Klaus (c:E


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