Hi,
I just updated the "Gardner's Layouts/Contrarry" folder with the new drawings.
It started out as a copy of your sidecar, but it just kept growing as
I wanted more comforts and still felt like I could handle building it.
It ran up against the limits of my confidence (shaky), building space
(barn stall 16' x 38') and ability to fit into a container, all about
the same time, so I figured this must be the right design for me.
- Gardner
On Sun, Apr 19, 2009 at 8:02 PM, Doug Haines <doha720@yahoo.
>
>
> the flat bottomed harriette did seem to me to slap across the wave tops -
> perhaps quicker but slappier.
> sidecar shape seems OK
> gardner - which boat exactly are you building?
>
> --- On Mon, 20/4/09, Gardner Pomper <gardner@networknow.
>
> From: Gardner Pomper <gardner@networknow.
> Subject: [harryproa] Hull cross section ?s
> To: harryproa@yahoogrou
> Date: Monday, 20 April, 2009, 12:40 AM
>
> Hi,
>
> I have questions on the "best" cross section for the ww hull in a
> harryproa of around the harry size (25-30' ww hull).
>
> I have been intending to use a flat bottom, which would reduce the
> above waterline height while still giving standing headroom. I figured
> a 10' flat section, with the hull curving up over a 4-6" radius would
> give enough flat space to walk. I think the hull needs to widen out to
> at least 2' beam above the waterline to make it comfortable to walk
> around in.
>
> The downsides of the flat bottom are possible slapping it short waves,
> a wider than minmal waterline beam (it will be close to 24' wide at
> the waterline; maybe 22", assuming a draft of 8" or so), and some
> complication getting the hull to bend uniformly when making it.
>
> What do the people on the group think is the "best" cross section to
> use for both simplicity of construction and performance (min beam and
> wetted surface) ?
>
> Would I be better off with just a 12" radius semicircular keel and
> vertical sides? It would be the simplest build and the min wetted
> surface for a 12" draft, but it probably would not draw that much.
> Displacement on a 12" radius for a 26' boat with a 0.75 prismatic
> coefficient would be 1960 lbs.
>
> Thanks for your thoughts!
>
> - Gardner
>
>
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