Gentlemen, you could contact Jim Nelson for details on his rear-mounted
crankshaft-driven Honda alternator setup...or perhaps figure out an adapter
that can drop the vacuum pump gear ratio and still be able to fit the B&C
8 amp... both units can be run at 5500 RPM with commensurate
increases in output with little risk. On the other hand, maybe the
expensivo
Rotax 40A is less risky.
Shaun
A207
----- Original Message -----
From: "Rob Housman" <RobH@hyperion-ef.com>
Subject: Re: 18 amps from a 914 !!!
> OOPS, you are quite right. The so called 20 amp alternator from B&C will
> put out a max. of 12.0 amps at 5500 engine RPM and 8 amps at 5000 engine
RPM
> (and the 8 amp version puts out 6.8 and 5.5 amps respectively for those
same
> RPM) because the accessory drive runs at 0.54 times the engine RPM. Time
to
> re-think the backup alternator - a small bump in the cowling is looking
> better all the time.
>
>
> Best regards,
>
> Rob Housman
> A070
> -----Original Message-----
> From: forum-owner@europaclub.org.uk
> Behalf Of ScramIt@aol.com
> Subject: Re: 18 amps from a 914 !!!
>
> Been down that road. Have the vacuum spline on my 912S, I'm just going to
> cover it up. The 20 amp B&C only puts out about 6 to 8 amp because the
> spline
> turns so slow. That's $650 for the alt. then you have to add a regulator
> $750
> or so for 8 amps. I'm going with the Rotax alt. as the main and installed
as
> back up.
>
> SteveD.
> A217
>
>
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