myiW Current Conditions and Forecasts Community Forums Windsurfing Videos Buy and Sell Services
 
Hi guest · myAccount · Log in
 SearchSearch   ProfileProfile   Log in to check your private messagesLog in to check your private messages   RegisterRegister 
FOILS
Goto page Previous  1, 2, 3  Next
 
Post new topic   Reply to topic    iWindsurf Community Forum Index -> Eastern and Central USA & Canada
View previous topic :: View next topic  
Author Message
outcast



Joined: 04 May 2004
Posts: 2431

PostPosted: Wed Aug 21, 2013 7:12 am    Post subject: Reply with quote

.....until you hit a turtle.....
_________________
https://www.youtube.com/watch?v=kILY0L9oTc0&feature=player_embedded
Back to top
View user's profile Send private message
DanWeiss



Joined: 24 Jun 2008
Posts: 1968
Location: Connecticut, USA

PostPosted: Wed Aug 21, 2013 7:25 am    Post subject: Reply with quote

There's a kiter in MV, Brock Callen, who often rides a foil board. I saw him last summer in VH harbor and offer the following limited observations.

He wasn't fast compared to guys on racing boards but it appeared that he was able to go faster in lighter conditions than the guys using twin-tips. I've no idea what sizes each used.

After each jibe his foil lost a lot of power. I suppose that when the kite moves forward in the new window the upward moment isn't converted to forward motion as soon and efficiently as with a board. It appeared Brock leaned back to keep from lifting entirely out of the water and slammed. Not sure that's what it was about, but looked that way to me. Different kite movement might eliminate that problem, if it actually exists.

Upwind foiling has been done by Emerites Team NZ, yet they say their VMG isn't as good on foils as in displacement. Sandbagging perhaps, but my view of Brock's upwind angle versus the race boards suggested the same.

Plus the turtle thing . . .

_________________
Support Your Sport. Join US Windsurfing!
www.USWindsurfing.org

www.konaone.com
Back to top
View user's profile Send private message
whitevan01



Joined: 29 Jun 2007
Posts: 508

PostPosted: Wed Aug 21, 2013 8:38 am    Post subject: Reply with quote

the AC wind maximum is based on apparent wind not true wind. so, it's actually the vector sum of the current (tide) "wind" and true wind. if the current and the wind are in opposite directions the true windspeed max. will be 23 knots minus the speed of the current. the converse is true if the true wind and current directions are in opposing directions.

so, when they talk about the wind maximum on the broadcast, they are talking about true wind speed, and notice that it changes every so often. That's because the tidal velocity (velocity takes into account both speed and direction) is constantly changing.

they dropped the wind maximum by 10 knots or so after the guy died on Artemis racing. I think it is fascinating (being a former sailboat racer and one time Hobie 14 East Coast champion) stuff. Just wish both boats would hold together so we could see a complete race with both boats finishing.

Really, really looking forward to NZ beating Oracle in Sept. I'd love the Cup to be in American hands, but not Larry Ellison's.
Back to top
View user's profile Send private message
zirtaeb



Joined: 03 Jul 2009
Posts: 2425

PostPosted: Wed Aug 21, 2013 6:19 pm    Post subject: Reply with quote

I watched as a kitesurfer on a foil moved from PuntaLasMarias in PuertoRico down to Condado, then back again in less than 40 minutes, which should beat any well powered Formula sailor. Maybe 3 miles each way.
Some Formula guys were watching from LasMarias, and mentioned it looked pretty efficient.
Currently, in SF Bay, it's hard to beat the 4 fin kiteboards using 40cm Tectonis fins and Slabs or whatever boards, if the winds are steady and always above 15 mph.
Back to top
View user's profile Send private message
outcast



Joined: 04 May 2004
Posts: 2431

PostPosted: Thu Aug 22, 2013 11:30 am    Post subject: Reply with quote

Did you see this.?
Kai on a raceboard Vs 72....they just reel him in like he's barely cooking

https://www.youtube.com/watch?v=zOFSyQ3V0Ig

Meanwhile in Turkey.(PWA)...Our man Josh is still waitng to climb thru the 2n'd Elim ladder semi's....must be frustrating just sitting around like that!

_________________
https://www.youtube.com/watch?v=kILY0L9oTc0&feature=player_embedded
Back to top
View user's profile Send private message
zirtaeb



Joined: 03 Jul 2009
Posts: 2425

PostPosted: Thu Aug 22, 2013 12:32 pm    Post subject: Reply with quote

What can we gleam from this?
AC has better top speed.
Kiteboard accelerates quicker.
Longcourse, GoldenGate to Alcatraz, no jibes, favors AC.
What about a typical Formula course? That requires 2 tack's a lap, and at least 3 jibes a lap, usually 2 laps.
Back to top
View user's profile Send private message
outcast



Joined: 04 May 2004
Posts: 2431

PostPosted: Thu Aug 22, 2013 12:50 pm    Post subject: Reply with quote

I didn't gleam anything but a smile
_________________
https://www.youtube.com/watch?v=kILY0L9oTc0&feature=player_embedded
Back to top
View user's profile Send private message
zirtaeb



Joined: 03 Jul 2009
Posts: 2425

PostPosted: Thu Aug 22, 2013 4:24 pm    Post subject: Reply with quote

15 millions bucks can be spent to edge out 3,000 bucks.
Back to top
View user's profile Send private message
outcast



Joined: 04 May 2004
Posts: 2431

PostPosted: Fri Aug 23, 2013 6:30 am    Post subject: Reply with quote

I am hijacking my own thread.

The PWA slalom in Turkey much more interesting.

Angulo working his way up the ladder......just took a bullet in the 3rd Elim

_________________
https://www.youtube.com/watch?v=kILY0L9oTc0&feature=player_embedded
Back to top
View user's profile Send private message
whitevan01



Joined: 29 Jun 2007
Posts: 508

PostPosted: Fri Aug 23, 2013 11:19 am    Post subject: Reply with quote

outcast wrote:
Did you see this.?
Kai on a raceboard Vs 72....they just reel him in like he's barely cooking

!


keep in mind that this video is an advert for Red Bull. Of course, they set it up to be exciting and to make sure that the more expensive boat they sponsor beats the least expensive "boat" they sponsor!
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    iWindsurf Community Forum Index -> Eastern and Central USA & Canada All times are GMT - 5 Hours
Goto page Previous  1, 2, 3  Next
Page 2 of 3

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You can attach files in this forum
You can download files in this forum

myiW | Weather | Community | Membership | Support | Log in
like us on facebook
© Copyright 1999-2007 WeatherFlow, Inc Contact Us Ad Marketplace

Powered by phpBB © 2001, 2005 phpBB Group