Landyachting

I thought that the Plumes and the air tracks would have the mast post in a designed position as they are production yachts?
What sail is the best performer at this time. The only sail maker that I can find in your part of the world is R@J.
Cheers
aus230

May be usful info .(from NZ Sandpaper mag)


Planing class 5 Battens:
Although the object of your aerofoil is a
maximum camber at around 40%,
because of the mast and mast pocket the
battens need to be shaped slightly differently.
I recommend that the shortest top
batten should have it's maximum camber
at 22% back and the longest at 35% with
the rest arranged logically in between.
Some people prefer 25% for all battens
and the fact that both methods give good
results shows that what is most important
is that you have a uniform shape over the
whole length of the sail. Mixing stiff and
soft battens with the max. camber at vary
-ing amounts is the worst of all worlds.
There need be no magic skill to planing
class 5 battens so long as you are
methodical and prepared to take quite a
long time about it.


Cheers
AUS230

Gday Jack.
I looks like you use a R@J sail like I use on aus230. I have never had the problem, Is your mast a yorker designed as that is what R@J designed my sail around. We also use a rowlock on the front of the boom maybe that is why mine holds it shape in light winds. Have the battens been tapered?

Q: As I have designed and built my own yachts from trial and error. The one thing that I have not been able to get a clear answer on is what distance is the center of the mast post back to the center of the back axles.(Plum for example)
Cheers
aus230


Edited by aus230 - 20 Apr 12 at 4:06am

Hi AUS230,

how ya do'in? I think we have chatted on seabreeze before. Good to see you have found this place!

Q: I have bad batten poke on my class 5 sail when I'm easing the sheet in the really light stuff. And I find my yacht is very binary when sailing in these conditions. It's either is going fast or isn't going at all. This seems to depend on if I have enough speed to generate enough apparent to sheet in to the point where my battens stop poking out the front. As you ease the sheet you end up with the luff pocket rolling forward and a really nasty 90˚ shape made by the sail / battens.

Any advice on this? Much much softer battens?

http://vimeo.com/easyridevideos/mondial2012

<object width="400" height="225"><param name="allowfullscreen" value="true" /><param name="allowscriptaccess" value="always" /><param name="movie" value="http://vimeo.com/moogaloop.swf?clip_id=38904675&server=vimeo.com&show_title=0&show_byline=0&show_portrait=0&color=64e36c&fullscreen=1&autoplay=0&loop=0" /><embed src="http://vimeo.com/moogaloop.swf?clip_id=38904675&server=vimeo.com&show_title=0&show_byline=0&show_portrait=0&color=64e36c&fullscreen=1&autoplay=0&loop=0" type="application/x-shockwave-flash" allowfullscreen="true" allowscriptaccess="always" width="400" height="225"></embed></object><p><a href="http://vimeo.com/38904675">Mondial 2012-Cherrueix</a> from <a href="http://vimeo.com/easyridevideos">Easy Ride</a> on <a href="http://vimeo.com">Vimeo</a>.</p>


Forum embed code for VIMEO anyone?