I can see the advantage of the rig in the ww hull in that there won't be any interference or turbulence from the ww hull on the sail.

  However, the boat will likely be simpler and lighter if the primary sailing stresses are all in the lw hull.  This way the fore/aft forces are all in a line in the same hull, and don't have to be translated through the beams.  That's a lot of torsion that won't have to be designed for. 

  I'd rather keep the rig, or rigs, in the lw hull, even if I have to add another meter in mast height.  That will likely be a stronger and lighter boat, with fewer opportunities for structural failure.

  Also, for racing, one advantage of rigs in the lw hull is that you can conceivably pop back up after a capsize.  Perhaps you'll need to use a sea anchor to do it, or have a small boat pull you back upright, but it shouldn't be hard either way. 

  Righting an atlantic proa would be a major undertaking, and could not be done alone or with a small boat assisting. 

  This would matter to me if I'm racing and pushing the boat to its limits. 

  It's rather disturbing to fly a hull on a boat when you know that a capsize will result in the boat going turtle, which will inevitably cause thousands of dollars of damage (mast, rigging, masthead insruments) if the water depth is less than the mast height.

       - Mike


Arto Hakkarainen wrote:

The most efficient racing rig would probably be high aspect ratio upwind rig on ww hull with possibility to add extras on lw hull (as light spars and rig as possible). Since there is plenty of righting moment rig could be very high aspect and therefore efficient upwind if designed and made correctly. Low aspect reaching sail on lw hull for speed when not hard on the wind. Crab claw theoretically would be great reaching sail but could be too far out in reality... --- On Thu, 3/19/09, Robert <cateran1949@yahoo.co.uk> wrote: From: Robert <cateran1949@yahoo.co.uk> Subject: [harryproa] Re: cantarry - racing - To: harryproa@yahoogroups.com.au Date: Thursday, March 19, 2009, 12:18 PM But weight in the right place. --- In harryproa@yahoogrou ps.com.au, Arto Hakkarainen <ahakkara@.. .> wrote: > > If we are talking about very fast boat the apparent wind should be forward of beam all the time. If you use spinnaker/screacher /any other downwind sail in windward rig it blankets the leeward hull rig. Any downwind sail used should be in the rig on lw hull. But the idea of rig on each hull is appealing but adds complexity and weight of course. >   > Arto >