G'day,
Gaff main sails are fine, but the weight of the gaff and the lump of
mast sticking up above the sail are both negatives. A gaff jib boom
needs to be pretty strong, so heavy.
regards,
Rob
On Sun, Mar 22, 2009 at 12:28 AM, Gardner Pomper <gardner@networknow.
> Thanks, I had not seen that. I have been leery of booms even before one hit
> my wife in the head, scaring everyone rather badly. One of the things I like
> about the harryproa is that it keeps the boom away from the crew.
>
> This picture is just a regular gaff rig main, though. I mean the easyrig,
> with both the main and jib on the same boom. Can't you put a mirror at the
> top of the mast to move away from triangular sails.
> - Gardner
>
> On Sat, Mar 21, 2009 at 11:19 AM, Kim Whitmyre <kwhitmyre@dslextrem
> wrote:
>>
>> Gardner Pomper wrote:
>> > 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.
>>
>> Gardner, have you not seen the wingsail used on most of the Wharram
>> designs? It is exactly as you describe, with the exception of the lower
>> boom: it has none, but instead runs on a traveler between the hulls.
>> Here is a picture of my boat in the slip with the main up:
>>
>> wingsail <http://farm2.
>>
>
>
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