That was one of the secrets to one of the America's cup sailboats, they
imbedded glass beads in the hull paint. Like the dimples on a golf ball or
the texture of sharks skin it tended to reduce the thickness of the boundary
layer making the hull hydrodynamically 'smaller'. Ain't that true, DrMayf?
My aero professor told me that if I wanted my car to go faster I should
attack it with a ball peen hammer. I have no data as to how effective this
would be. DrMayf needs a dyno and a windtunnel in the metropolis of Pah
Rump Nev.
Dave Seely
1141 XF/VOT
----- Original Message -----
From: <Want1937hd@aol.com>
To: <MPittwood@compuserve.com>; <r.hammond@sympatico.ca>
Cc: <land-speed@autox.team.net>
Sent: Monday, May 20, 2002 4:46 PM
Subject: Re: Ways to spend a weekend - water not land
> Malcolm, Good luck with your project! What grit paper are you using? If
> memory is right a sailboat racer told me a smooth dull hull goes through
the
> water with less resistance tham a smooth shiny one. Is that correct? Bob
in
> connecticut
>
>
> > Rick and List
> >
> > The hull of Lightning Strike! is all marine plywood. We do have two
carbon
> > fibre spars that hold the outrigged sponsons. The plywood has been
epoxy
> > resin coated. You may need a lot of water on the salt as we expect the
> > weight of batteries to put her 12 inches into the water at rest but on
the
> > plane in less than 4 inches. But of course the design is a one off and
> > testing in a few months will tell us the full story.
> >
> > Malcolm
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