Subject: Re: [harryproa] Gaff easyrig?
From: Arto Hakkarainen
Date: 3/22/2009, 3:53 PM
To: harryproa@yahoogroups.com.au
Reply-to:
harryproa@yahoogroups.com.au

Keep in mind that heeling is not the only reason to avoid weight up high. Boat moves in many ways when sailing. Pitching, yawing, rolling etc. All weight far from center of gravity is bad for those movements and especially boat performance. If that weigh is also high it is BAD. You can't get farther from center of gravity than mast top. You can't get higher either. All weight there is very bad for your performance and boat behaviour. The fanatcis try to remove every gram of weight from the mast top they can. Adding tens of kilos or more is hardly wise.
 
Arto

--- On Sat, 3/21/09, Gardner Pomper <gardner@networknow.org> wrote:

From: Gardner Pomper <gardner@networknow.org>
Subject: [harryproa] Gaff easyrig?
To: harryproa@yahoogroups.com.au
Date: Saturday, March 21, 2009, 4:34 PM

Hi,

This is probably a dumb question, but what is the problem with a "gaff" easyrig? By this I mean an easy rig with a boom at both the top and bottom of the mast, so that both the jib and main are rectangular in shape, instead of triangular? Everything I read indicates that a triangular sail is inefficient, and that more sail area higher up is better. I have seen solid wing sails in this configuration.

I know weight aloft is a bad thing on a monohull, because it intensives the pendulum effect m the inevitable heeling, but on a multihull, which should never lift a hull (cruising, not racing proa) it doesn't seem like it will matter until you are in alot of trouble anyway. Plus, having a rectangular sail should lower the center of effort considerably, to keep you out of trouble.

Anyway, basic explanations of why I am wrong would be appreciated <grin>

- Gardner Pomper


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