RE: [ksurfschool] Foil AOA comish
All my # steps were totally related to paragliding. Someone asked before
what this is all about.
That's all I tried to explain.
ist.com]On Behalf Of Colin Gowland
Sent: Friday, September 29, 2000 10:59 AM
Subject: Re: [ksurfschool] Foil AOA comish
> 2. best glide - hands up = no brakes applied , you have best glide and topride
> speed on given line trim, but you sinking faster (On kite this is fast
> with best upwind but a bit less pull).I'm not sure how much kitesurfing you've done Dave but from my experience of
riding foils (not designing, only beginning to understand that) I tend to
ride in what you call "best glide" mode ALL THE TIME. Brakes come on only in
extremely underpowered conditions. Otherwise the kite is just pulling too
much downwind and I get sucked into an apparent wind death trap. I need to
have the kite set fast otherwise I can't handle the power. (PS I like to
ride super-powered up all the time.. the only way to get incredible jumps)
I'd really like to see someone handle an super-powered up foil and have some
brake applied. Basically I am trying at all times to push the kite farther
to the edge of the window so that it doesn't completely overpower me and
brakes only hinder this action.
> This is good, but there is higher risk of collapses in turbulence. Youhave
> to watch your brake pressure and be in control all the time !!This has got to be some kind of myth or else symptoms of riding with no
brakes in an underpowered situation. I haven't experienced very much luffing
while riding. Maybe it's just my Concept Air kites though... but wait I
didn't see any foil users in the gorge (F-One mostly) using brakes... or
anyone on Flexifoil blades. They weren't luffing at all and they were flying
. You can gain +15 km speed !!
> BUT you are flying at the most sketchy trim - any turbulence and leading"tossing
> edge goes to full collapse, recovery is messy and often followed by
> your laundry" alias reserve chute deployment.Well, the way Concept Air has setup the kites, you can pick between 3 knots
> (With kites - way of recovery is also important)
to attach the flying line. Fast (for steady and stronger winds), medium
(compromise) and slow (stable, grunt). The VAOAS system just let's you vary
the position of the attachment point while flying the kite instead of on
land. It really has nothing at all to do with brakes. If the kite feels like
it is going to luff, you can just pull on the center line and it instantly
reverses (increasing aoa and pulling on some brake when you pull enough line
in) ... an easy recovery.
. We also designed "power steering"
> system which engage brake pull on wing tip when you turn the bar - I dareto
> say that WET is fastest turning water kite right now!You could add brake like flying with handles to any foil and it would turn
really fast. I prefer to turn without brake especially when powered up.
Kite is very solid in
> clean air, pull quite smooth and as every ram air in gusts needs fasterI tried it yesterday and I agree! Very smooth power! Quite user friendly!
> reaction from pilot.
> We have the same brake tension adjustment ( it is notit
> "real" A0A trim - you just go for brake set up as per my #2/3 above) and
> helps to "calm down" kite in turbulence and control maybe 10-15% of power,Actually you do not have the same brake tension adjustment as the VAOAS.
> but is not as effective as sheet in-out on inflatable kites.
Which is pretty close to "real" AOA trim. Changing the flying line
attachment point between AB and CD bridles changes angle of attack on a foil
does it not? However you do have a similar brake tension adjustment to the
factory Concept Air New Wave.