I don't suppose too many people have sailed all the possible configurations. spray is a consideration as I have found in simply raising my cabin to make a totally dry comfortable cockpit - though how can I lower the windage? the basic theoretical idea of righting moment/weight/friction/and sail area are inter-related, you go from one step to the next by changing one part and then seeing what to look at next. I think the basic design as is say harry or visionarry, or solitarry seems a steady stepping stone from which you would not change. what can be done with length of hulls and size of rigs will be up to the maxi project camps. and info could filter back down to ordinary folk. the bickering in SA forum is a bad sign for development. I aint got no money. but would build a boat much more cutting edge spartan accoms longer wlw hull than the vis and harrys, maybe even let skipper rob to help race/campaign it.   From: jrwells2007 <jrwells2007@yahoo.com.au> Subject: [harryproa] Re: cantarry - racing - proas To: harryproa@yahoogroups.com.au Date: Friday, 20 March, 2009, 9:59 PM For me the main benefits of a Harryproa, other than the proa benefits themselves, are: Relative to a pacific proa, there is more weight to windward allowing a greater sail area to be carried; cruising proas do not wish to fly the windward hull but this is one of the main aspects of a pacific proa; the helm and crew are to windward of most of the spray whereas cruising pacific proas appear to be very wet boats indeed. Relative to an atlantic proa, the main stresses are all concentrated near the centre section of the leeward hull whereas an atlantic proa has high stresses in the windward hull that have to be transferred to the leeward hull by a beefy beam structure; when an altantic proa gets powered up by strong winds the rig rises and this increases the overturning leverage whereas a Harryproa reduces the leverage marginally. --- In harryproa@yahoogrou ps.com.au, Doug Haines <doha720@... > wrote: > > Hey ya, >   > Not really studying history of proas and that sort of thing,, what is the real difference between a harryproa and ann atlantic proa? > Rob has introduced practical proa friendly improvements like the easy (ballestron rig) to make a proa of any type more feasible, and made a proffessional design effort that surpasses anny other proas (not that I've studied the alternatives too much). > What is a harryproa advocate's stance on other proas then? Assuming we are sailing a harryproa. We are better  because? > Are we Agreed on what exactly/ >   > Doug

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