Subject: Re: [harryproa] Overall beam.
From: George Kuck
Date: 4/29/2008, 8:14 PM

Hello Rob ,
What would you think of reducing beam on 40' Harryproa from 22' 3" to 18'-8"(47%) ?  Would there be any problem with bow wakes coming together and causing added hydrodynamic resistance ?
Happy sailing,
George Kuck,
Chestertown, MD

Rob Denney <> wrote:

Probably not. I have reduced Elementarry from 4m down to 3.5 (53% to
47%) and feel it could go less, particularly with the small rig



On Tue, Apr 29, 2008 at 3:06 PM, Robert <> wrote:
> Have been wondering if overall beam needs to be quite as wide. Are
> there other advantage other than righting moment and deck area, such
> as avoiding wave interference. I wouldn't have though it so important,
> considering how little wake they leave. The reason I am asking is for
> ease of getting through locks and marina berthing, If I have to spend
> a bit of time in Darwin. 20% less beam would mean 10% less wind before
> reefing, and 40% less weight in the cross beams. It should still do 14
> in 15, but would have to be a bit more careful after that. My figures
> give a monocoque Harry 20% narrower than normal as about the same
> weight, and about 10- 20% extra wind drag. But an extra 30%-50%weight
> penalty with the extra crap that comes on board
> Robert

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