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by Sandras
Mon Jun 04, 2018 3:22 pm
Forum: Kitesurfing
Topic: Is anyone else buying carbon credits to offset CO2 from travel?
Replies: 309
Views: 128578

Re: Is anyone else buying carbon credits to offset CO2 from travel?

marlboroughman wrote:
Mon Jun 04, 2018 12:46 pm

... people are sick of fake do gooders, status seeking narcissistic types.
...
How did I sense it, a decade in advance, I don't know. Maybe, I should be working at the Pentagon with my super sensitive bullshit detecting radar.
You are a wasted talent! :baby:
Tell us more!
by Sandras
Tue May 08, 2018 12:54 pm
Forum: Kitesurfing
Topic: Any tips on building a foilboard...
Replies: 12
Views: 6035

Re: Any tips on building a foilboard...

I got my hands on a decent foil but do not want to shell out $1000 for a board. Has anyone built their own board and if so can you give me some tips. Thanks That's a very interesting topic. I wish there was a wiki or a sticky to summarize all the knowledge that is spread in here... Any volunteers? ...
by Sandras
Tue May 08, 2018 8:59 am
Forum: Kitesurfing
Topic: Are Pulley bridles more tolerant to stretch/shrink?
Replies: 26
Views: 9322

Re: Are Pulley bridles more tolerant to stretch/shrink?

My wrong, instead of “center of moments” I should have called it the aerodynamic center (wider used term). The point at 1/4 of the chord for our applications. https://www.grc.nasa.gov/www/k-12/airplane/ac.html https://en.wikipedia.org/wiki/Aerodynamic_center (AoA increases, chord gets shorter, AC co...
by Sandras
Mon May 07, 2018 7:43 pm
Forum: Kitesurfing
Topic: Are Pulley bridles more tolerant to stretch/shrink?
Replies: 26
Views: 9322

Re: Are Pulley bridles more tolerant to stretch/shrink?

Again, my understanding is: (and you are welcome to challenge it as this helps me understand better) As you sheet in, the wing tips come forward and the CoM (center of moment) comes forward relative to the LE (while the kite sits deeper), that loads more the front lines and changes the whole geometr...
by Sandras
Mon May 07, 2018 7:10 pm
Forum: Hydrofoil
Topic: Hydrofoil Videos
Replies: 392
Views: 104905

Re: Hydrofoil Videos

May the force be with you

phpBB [video]
by Sandras
Mon May 07, 2018 9:50 am
Forum: Kitesurfing
Topic: Are Pulley bridles more tolerant to stretch/shrink?
Replies: 26
Views: 9322

Re: Are Pulley bridles more tolerant to stretch/shrink?

20180507_104910.png
Vector analysis on real picture /experiment show that a2 does not carry load, because if it would a1 and al1 would not be parallel!

And off course if "equally loaded" a1 would have the same angle as a2 compared to AL1.
Now one is parallel and the other at right angle!
by Sandras
Sun May 06, 2018 10:10 pm
Forum: Kitesurfing
Topic: Are Pulley bridles more tolerant to stretch/shrink?
Replies: 26
Views: 9322

Re: Are Pulley bridles more tolerant to stretch/shrink?

^Dude. You obviously just want to argue. That's not how kites work. Go tie your kite to a solid object, fully power it up near the ground, go ping the lines. You'll see that they're pretty equally tensioned. Then come back and whine about how the experiment is invalid. Well, I just want to learn an...
by Sandras
Sun May 06, 2018 8:49 pm
Forum: Kitesurfing
Topic: Are Pulley bridles more tolerant to stretch/shrink?
Replies: 26
Views: 9322

Re: Are Pulley bridles more tolerant to stretch/shrink?

And that front view of the Ozone Reo is a frontal projection of the bridle geometry, not a true-view of the A1/A2/AL1 plane, so the angles shown in that frontal projection are not true, but rather projections onto the front view plane. Still if you add all vectors in a (non accelerating) node they ...
by Sandras
Sun May 06, 2018 7:25 pm
Forum: Kitesurfing
Topic: Are Pulley bridles more tolerant to stretch/shrink?
Replies: 26
Views: 9322

Re: Are Pulley bridles more tolerant to stretch/shrink?

Don't "ASS-u-me" just do the vector analysis. It's simple for a string or group of strings. As we say in engineering, "you can't push a rope." Oh, I'm glad that we can talk with vectors! Just take the first drawing (Ozone Reo from the pdf manual) You see that A1 is parallel to AL1 that simply means...
by Sandras
Sun May 06, 2018 2:55 pm
Forum: Hydrofoil
Topic: Bracuru Hover board - Excellent !
Replies: 18
Views: 10360

Re: Bracuru Hover board - Excellent !

Actually I remember one of your heroes, Greg, saying the same thing like Peter when talking about his board. Do you want me to find it for you?

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