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.

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

Please refer to Stephen BourneÃ‚Â´s work on a Hydrofoil Sail Craft here.
Especially the background referring to Australian and U.S. patents and Stephen BourneÃ‚Â´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 StephenÃ‚Â´s work are most of the mathematical proofs, the kite specific and dynamic aspects.

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 > 45Ãƒâ€šÃ‚Â°).
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.

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 donÃƒâ€šÃ‚Â´t look up my statistics too often) of downloads of Downwind for Dummies and only one single person with negative feedback: "waker".