SailNet Community

SailNet Community (http://www.sailnet.com/forums/)
-   General Discussion (sailing related) (http://www.sailnet.com/forums/general-discussion-sailing-related/)
-   -   Prototype-Video: Kite-Scooter to become fastest sail craft ever? (http://www.sailnet.com/forums/general-discussion-sailing-related/100808-prototype-video-kite-scooter-become-fastest-sail-craft-ever.html)

kibokit 06-26-2013 04:53 AM

Prototype-Video: Kite-Scooter to become fastest sail craft ever?
 
1 Attachment(s)
Following video is of a home made prototype, which performance-wise is yet far away from the supposed potential. I believe, however, that by putting sufficient R&D into it, the concept (which, if only launch/retrieval systems for big enough kites were available, also could be scaled up and turn any motor yacht into a high performance sail craft) could be turned into the fastest sail craft ever, not in absolute terms challenging the Sailrockets speed record obviously, but among viable sail craft of similar size competing on a race course.



http://www.sailnet.com/forums/attach...1&d=1372232777

Main reason for my certainly daring claim is the fact that sail/kite- and (hydro-)foil-generated forces in my kite-scooter are aligned, which leaves the sail craft completely free of sail induced heel, which actually is the main performance limiting factor of any conventional sailcraft (even incl. kite boards). This in turn allows for giant sail area(in my case 21sqm on a 35kg/2,80m boat), limited only by the (hydro-)foils capacity rather than ballast and lever arm.
The only other notable sail craft, as to my knowledge, to be free of sail induced heel, is the Vestas Sailrocket, which certainly supports my claim.
Very interested in opinions about my idea in general, its viability as a small pleasure sail craft and about my strong claim regarding its performance potential.

Ingo

lajimo 06-26-2013 07:27 AM

Prototype-Video: Kite-Scooter to become fastest sail craft ever?
 
Ingenious ! That certainly looks like fun.

mad_machine 06-26-2013 09:32 AM

Re: Prototype-Video: Kite-Scooter to become fastest sail craft ever?
 
looks like great fun! I can just imagine the kit carnage during a regatta

DearPrudence 06-26-2013 10:04 AM

Re: Prototype-Video: Kite-Scooter to become fastest sail craft ever?
 
While impressive, it looks exhausting! ;)

Jeff

miatapaul 06-26-2013 02:38 PM

Re: Prototype-Video: Kite-Scooter to become fastest sail craft ever?
 
Looks really cool, as long as you want to go downwind!

kibokit 06-27-2013 04:34 AM

Re: Prototype-Video: Kite-Scooter to become fastest sail craft ever?
 
Quote:

Originally Posted by miatapaul (Post 1050107)
Looks really cool, as long as you want to go downwind!

That is quite an unqualified comment, this thing is going upwind very well and you can even see it in the video during the jibe from 2:08 to 2:18.

mad_machine 06-27-2013 09:17 AM

Re: Prototype-Video: Kite-Scooter to become fastest sail craft ever?
 
agreed.. while I can't say if it can do close hauled.. it certainly does a beam reach well

kibokit 06-27-2013 03:32 PM

Re: Prototype-Video: Kite-Scooter to become fastest sail craft ever?
 
Quote:

Originally Posted by mad_machine (Post 1050565)
agreed.. while I can't say if it can do close hauled.. it certainly does a beam reach well

I had only very limited time for testing, as the monsoon started shortly after completing the prototype (and it will be around for another 2-3 months).
I have sailed effortlessly at around 60deg off the true wind, but I could have done little better. While that is certainly far less than most dinghies sail(~45deg?), the VMG wasn't that bad, considering that this is a home-made prototype with lots of room for improvement.
Race course kite boards can even beat foiling moths in the right conditions on a course, so the times when upwind performance of kites was generally poor are certainly over:

mad_machine 06-27-2013 05:22 PM

Re: Prototype-Video: Kite-Scooter to become fastest sail craft ever?
 
I think playing with the design, you can get up close to where the Dinghys get close hauled.

The neat part is, it looks amazingly simple


All times are GMT -4. The time now is 05:07 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012