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You got it.. the wind window moves and shifts all over the place...
I'm doing some pendulum Jumps here... as it shifts...



Now on the SP Purple LTD 12m Sweet!

Paul
www.PBKiteboarding.com

joedy wrote:Thanks for the links, fellas.

Once I understood the wind window and how it changes while moving with the kite (the apparent wind against the kite), it makes sense now.

-joedy

joedy wrote: Once I understood the wind window and how it changes while moving with the kite (the apparent wind against the kite), it makes sense now.

If you want to visualize wind window I hope my tool helps you

http://www.jori.ws/kite_vectors/

You should see something like attached image
- white arrow is apparent wind
- green arrow is board direction
- true wind is always bottom to top

joriws wrote:

joedy wrote: Once I understood the wind window and how it changes while moving with the kite (the apparent wind against the kite), it makes sense now.

If you want to visualize wind window I hope my tool helps you

http://www.jori.ws/kite_vectors/

You should see something like attached image
- white arrow is apparent wind
- green arrow is board direction
- true wind is always bottom to top

kitevectors_example_56kn_speedrecord.jpg

Great job jori!
But really, you should back-up more often

Joriws:

Thanks for the link, Joriws. I enjoyed using your program. Also, check Foilzone in the Infinity Bar Pimping thread; I inquired with your concerning your cylinders on the Speed3 kites.


Axelrider:

Thank you for taking the time to type up your response.


Kami:

Thanks for the link.

-joedy

joedy wrote:Also, check Foilzone in the Infinity Bar Pimping thread;

Joedy, can you please post a link to this thread?

tnx

joriws wrote: If you want to visualize wind window I hope my tool helps you
http://www.jori.ws/kite_vectors/

Let us know when you've got your program back that includes the Speed3.
What L/D values were you taking for high and low aspect ratio tube kites?
It seems the value you took was not better than 4. I believe even tubes have far better L/D than that.
L/D of Speeds much approach that of paragliders (8+).

Afterthought: perhaps you are integrating the fact the kite's pull is not horizontal, yet another factor that should be taken into account.

zob wrote:

joedy wrote:Also, check Foilzone in the Infinity Bar Pimping thread;

Joedy, can you please post a link to this thread?

tnx

http://www.foilzone.com/phpbb3/viewtopi ... =1&t=12870

Hi,

as you're talking about the shifting wind window, there's also this website with some interesting pics.
http://www.aeroandi.de/kitesurf-mechani ... indfester/




Cheers!

alexrider wrote:

joriws wrote: If you want to visualize wind window I hope my tool helps you
http://www.jori.ws/kite_vectors/

Let us know when you've got your program back that includes the Speed3.
What L/D values were you taking for high and low aspect ratio tube kites?
It seems the value you took was not better than 4. I believe even tubes have far better L/D than that.
L/D of Speeds much approach that of paragliders (8+).

Afterthought: perhaps you are integrating the fact the kite's pull is not horizontal, yet another factor that should be taken into account.

Actually "openness" of wind window is not calculated because I could not find any formula for it. Also sea current, board, snowboard, skis are not modelled as this is mainly ww rotation visualization tool.

So clicking HI-AR and LOW-AR only changes gradient of approx usable wind window. There were some discussion about gradients when I built the tool.

But like said there are so many variables..