Subject: [harryproa] Re: Aerodynamics and sailing performance
From: "brag_rotor" <>
Date: 3/9/2007, 9:57 PM

Hello Robert,

Yes, the dutch 'botters' (or similar name?) that were the inspiration
for that gaff do indeed have a curved gaff - the straight one is a
concession to the likely first-time-builder of a Wharram, I think.
Bending the jaws open was a pretty 'fun' activity! We were very new
to boatbuilding.

Any thoughts on vortex development up there? I keep looking for that
to accommodate higher angles of attack - like Concorde did. Most
sails run at wing loadings and angles of attack that are comparable to
aircraft at landing speed rather than at cruising speed.

All the best, Ben

PS sorry for long absence, been en route via Dubai, now in Bendigo, Vic.

--- In, "Robert" <cateran1949@...> wrote:
> The Wharram rig makes sense to me, possibly with a curved gaff to
> sooth the exit. Not sure of how to set up the unstayed mast to take
> the point loading of the gaff,
> Robert

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