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Re: Airush Ultra: one strut kite that meets expectations of a ram air lover

Posted: Wed Aug 23, 2017 5:53 pm
by knotwindy
Velocity Made Good
overly simplistic is
Balance between max speed and max upwind/downwind to reach a mark

Re: Airush Ultra: one strut kite that meets expectations of a foilkite fan

Posted: Wed Aug 23, 2017 6:05 pm
by abel
Bushflyr wrote:
Wed Aug 23, 2017 4:56 pm
^Love the polar charts, super helpful in visualizing the the kite characteristics. What's VMG (the inner dotted line) though?
Velocity Made Good ( I wonder who was the copyrigher :-? )
The velocity component projected on the wind direction

Re: Airush Ultra: one strut kite that meets expectations of a foilkite fan

Posted: Wed Aug 23, 2017 7:50 pm
by Bille
Bushflyr wrote:
Wed Aug 23, 2017 4:56 pm
...


Dyneema and Spectra are, for all intents and purposes, the same thing. Just different brand names for the same stuff.
Yes i realize that ; my question is :
Are they using Spectra , (Woven-Fiber) on the Airush Ultra ?

Bille

Re: Airush Ultra: one strut kite that meets expectations of a ram air lover

Posted: Wed Aug 23, 2017 9:08 pm
by airsurfer
I think they're using spectra as reinforcement web across panels. the actual canopy material is probably a version of ripstop

Re: Airush Ultra: one strut kite that meets expectations of a foilkite fan

Posted: Thu Aug 24, 2017 2:28 am
by alexrider
Bushflyr wrote:
Wed Aug 23, 2017 4:56 pm
^Love the polar charts, super helpful in visualizing the the kite characteristics. What's VMG (the inner dotted line) though?
...
There's a whole thread dedicated to VMG. Look half-way down this page.
http://kiteforum.com/viewtopic.php?f=19 ... g&start=50

Re: Airush Ultra: one strut kite that meets expectations of a foilkite fan

Posted: Thu Aug 24, 2017 5:16 am
by Bushflyr
Bille wrote:
Wed Aug 23, 2017 7:50 pm

Yes i realize that ; my question is :
Are they using Spectra , (Woven-Fiber) on the Airush Ultra ?
As the fabric itself? No. The canopy is still Dacron. If you look at the pictures all that criss-cross stuff is Dyneema tape. It allows the canopy fabric to be lighter and the tape supposedly transfers the stress to keep the lighter fabric from stretching.

Re: Airush Ultra: one strut kite that meets expectations of a foilkite fan

Posted: Thu Aug 24, 2017 1:18 pm
by Bille
Bushflyr wrote:
Thu Aug 24, 2017 5:16 am
Bille wrote:
Wed Aug 23, 2017 7:50 pm

Yes i realize that ; my question is :
Are they using Spectra , (Woven-Fiber) on the Airush Ultra ?
As the fabric itself? No. The canopy is still Dacron.
...
@ airsurfer & Bushflyr

Thanks !
I kinda thought it was gonna be a reinforcement of some type ; the
woven spectra is SO good, that i doubt they'd need a heavier fabric than
like .5-oz , (16.9 g/m2)
BUT DANG , it would be expensive !!! :(
A one strut LEI, made with 17-g/m2 woven Spectra, would be the Ultimate light-weight kite ;
unless Ya used that fabric to build a Ram-Air !!! :D ---------------------------- :lol:

Bille

Re: Airush Ultra: one strut kite that meets expectations of a ram air lover

Posted: Tue Aug 29, 2017 6:01 pm
by windsuks
https://www.youtube.com/watch?v=Dn6Nj5ng-nY
phpBB [video]

Re: Airush Ultra: one strut kite that meets expectations of a ram air lover

Posted: Tue Aug 29, 2017 6:11 pm
by pikovsg
Nice video! What was it blowing?

Re: Airush Ultra: one strut kite that meets expectations of a ram air lover

Posted: Tue Aug 29, 2017 6:44 pm
by windsuks
pikovsg wrote:
Tue Aug 29, 2017 6:11 pm
Nice video! What was it blowing?
Not exactly sure but probably around 10-12mph max
The combo of P foil and Ultra is quite a hard one to beat on days like that.