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--- In electricboats@yahoogroups.com, "Jerry Barth" <shredderf16@...> wrote:
>
> Chris,
>
> Another advantage I thought of later is you could put a monster of a prop
> on it if you could figure out the gearing. The shaft angle might be a
> problem, although if you mounted it around where the bridgedeck joins the
> main hull (30" above waterline) that might help.
>
> Jerry
>
>
>
> _____
>
> From: electricboats@yahoogroups.com [mailto:electricboats@yahoogroups.com]
> On Behalf Of chris Baker
> Sent: Thursday, March 01, 2012 5:12 PM
> To: electricboats@yahoogroups.com
> Subject: Re: [Electric Boats] Re: Newbie Question- Converting a 45'
> catamaran
>
>
>
>
>
> Hi Jerry,
>
>
>
> Sounds similar huh. I agree that a CV joint would be better than the
> universal joint that is used in this example-it would cut out any vibration.
> In an ICE installation perhaps the extra vibration of a uni joint might go
> un-noticed but with an electric drive I think it would be annoying.
>
>
>
> cheers
>
>
>
> chris
>
>
>
> On 02/03/2012, at 3:52 AM, Jerry Barth wrote:
>
>
>
>
>
>
>
>
>
> Chris,
>
> The guy who designs the Coral Coast catamarans in OZ has done this on his
> CC 27. I wrote to him a couple of years ago about it. The setup was pretty
> simple, just a tractor style U-joint and a strut close to the prop to lower
> the prop and shaft. He actually had a copper tube on the strut for the
> cooling water, and an electric pump to lift it to the engines raw water
> intake so no through hulls. I think a little better arrangement might be a
> keel cooler combined with one or two of the constant velocity joints. That
> way you could bed the motor on soft rubber mounts and kill some of the noise
> and vibration. Pro Boatbuilder had a good article about this maybe a year
> ago.
>
> Jerry Barth
>
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