[MHml] Open Racing offshore vs closed course was Cats vs Tri

[Alan Christoffersen]

You use a Balestron rig, with the windvane mounted at the forward end of 
the jib boom. The vane is connected to the tiller arm via a lever/gear 
system. By adjusting the length of the arm, you can adjust the 
amplification. Presto you have a proportional controller, that will give 
you a speed dependent offset,if you fiddle enough,this can probably made to 
compensate for any offset/drift the boat has.  If there isn't enough power 
in this arrangement, you can use a trimtab on your rudder.

I am trying to figure out how to use the rig itself, as this will offer 
even more power.....

Actually came upon the idea of using a traditional autopilot to steer to a 
waypoint, then add a vane at the forward end of the balestron jib to 
control the whole boom relative to the wind, so you have an automatic trim 
system - alot simpler than the PLC based one I saw a wrte up on a couple of 
years ago in Yachting world I think.  Ideal for lazy or tired single 
handers.

Best Regards/Med venlig hilsen

Alan Christoffersen




-----Oprindelig meddelelse-----
Fra:	Gary Pearce [SMTP:gary at steamradio.com]
Sendt:	5. november 2006 22:31
Til:	Informed discussion of multihull issues
Emne:	Re: [MHml] Open Racing offshore vs closed course was Cats vs Tri

On Monday 06 November 2006 00:18, Rob Denney wrote:
> Wind
> driven self steering gear

Now just how do you plan to do that for a vessel that presumably sails 
faster
than wind speed at times over a predominantly downwind course ?

Gary
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