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From: cirejay (no email)
Date: Thu Jul 07 2005 - 21:48:10 EDT
--- In , Jim Burgoyne <jimbim at g dot dot dot >
wrote:
> Hmm, and of course we are talking about a spinning propshaft that
is
> no longer attached to an engine. That would be very useful if there
> was a setup for that. I plan to pull the engine, but I have no
> intention of messing with the prop thru-hull in case they invent
the
> hydrogren auxillary (Anyone see Bush's new conference in Denmark
> yesterday? He's working on it :) or just decide engineless is not
> really for me.
How about electric? the eteke motor should drive your boat fine.
It's cheap and with the proper controller you can regen while
sailing.
> Also be curious if there is a prop designed to just spin in the
water,
> rather than drive a boat. Big and light, keeping drag to a minimum.
> Maybe there an invention in the offing.
Forget about inventing it, many have already done so. It's called a
perpetual motion machine:-). Which is to say, work is drag and it
really doesn't matter how light your prop is. If you do decide to
go the prop route all you have to do to get the best output per knot
is to reverse the prop on the shaft. But, keep in mind, work is
drag.
If I recall correctly, the vancouver has a full keel with the prop
in an aperture? If that is the case, why not go the reversed prop
route with 2 bladed prop. When the winds are up, gen elec, when the
winds are light, lock the prop vertically to cut your drag.
Good luck, eric S/V Nebaras
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