Subject: [harryproa] Extra length
From: Doug Haines
Date: 5/10/2011, 7:39 PM
To: harryproa@yahoogroups.com.au
Reply-to:
harryproa@yahoogroups.com.au

 

I don't know those catamarans. Does the extra length really improve the speed by some hydro-dynamic effect or is it that you can add more mast ans sail with safety if your lw hull extends out a few more metres?

--- On Wed, 11/5/11, Mike Crawford <mcrawf@nuomo.com> wrote:

From: Mike Crawford <mcrawf@nuomo.com>
Subject: Re: [harryproa] Re: Gougeon 32' foot 8 1/2 feet beam trailer to water ready
To: harryproa@yahoogroups.com.au
Date: Wednesday, 11 May, 2011, 3:57

 
<<We need to be far longer in proportion to the accomodations I think.  Or is it just that we can afford to go longer without much extra weight and expense?>>

  Both!  Of course, I'm guessing the question was semi-rhetorical.

  The cost is low enough to where it's silly to try to save money with shorter hulls -- the performance hit wouldn't generate any real savings.

  I'm not sure one /can/ accurately explain the whole proa length thing.  I try to explain the 40 footer as a really fast 30-footer, the same way an Outremer 45 has the accommodation space of some 35-foot cruising catamarssn.  Since people seem to somewhat readily accept that the Outremer is a fast boat that has added length for performance, they seem to start to understand the proa. 

  However, that doesn't help people get over their discomfort with the unexpected proa form factor.  And I'm not sure there's much that can be said in that department to convince a naysayer of the proa's value.

  Gardner was trying to find a succinct and convincing explanation for a while.  Any luck with that, Gardner?

        - Mike



Doug Haines wrote:
 
That video has some nice hull flying in it.
Not a huge cabin. But of a camper class cruiser maybe.
 
Well it is the long hulls that I loved about sidecar (lw hull at least).
It sticks way out and is so thin and slices through not hobby-horsing.
No wake turbulence and so on.
There are a few people doing there large cruising cat with 40' accomodations but extending out their cat hulls to about 60'. Longer but skinnier.
I don't think the leeward hull length of a proa should be compared exactly to a catamaran length though. We need to be far longer in proportion to the accomodations I think.
Or is it just that we can afford to go longer without much extra weight and expense?
 
Doug
Western Australia.

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