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Subject: Re: [worldcruising] Towed Generators
truelove39@XXX.XXX
Date: Tue Sep 10 2002 - 21:05:21 EDT
Hi Barry,
I am not the alternator man you mention, but you and I discussed this in 1997
on the old cruising group. My B-W gear had a hydraulic shaft brake, which I
removed with an eye towards a shaft alternator install; when I thoroughly
looked into it, I decided that, in my case, it was not suitable for several
reasons:
1. I have a V-drive, and so the driving pulley, being under the engine, would
have a limited diameter and would require excessive belt length to keep the
alternator up out of the bilges. Also, the alternator mounting location would
interfere with existing clear space in the ER.
2. I decided that, where I cruise, I'd have enough sun and wind to do the job
without a shaft alternator. This has proven true.
3. Having "freewheeled" the propshaft on passage, I decided that the noise
level in the quarterberths was unacceptable.
4. I wanted to (and did) install a feathering prop, partially because of #3,
above. Not dragging a large 3-bladed wheel through the water has
significantly increased boatspeed.
Amel boats always seem to have a third, shaft-driven alternator mounted above
the reverse gear, but to me, 3 alternators is like two heads. Just one more
thing to fix!
FWIW, I did check out the Aqua-Airs and if were to go that way, I'd get the
transom bracket rig.
Good sailing,
John
"Truelove" - Westsail 43
> Barry writes:
>
> There used to be someone here who made an alternator that fitted to the
> main engine prop shaft. when the prop free whealed it could generate up to
> 15 amps.
> I wanted to fit one to "Illusion III' but did not have time now the guy
> seems to have died or retired.
> He rewired existing alternators and used a 10" pulley on the propshaft.
> I have thought of experimenting with available slow revving alternators .
> Does any one know if something similar is available?
>
>
[Non-text portions of this message have been removed]
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