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John Bickham
Joined: 10 Jan 2006
Posts: 170
Location: St. Francisville, LA
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 Posted: Wed Mar 23, 2016 9:33 am Post subject: Single vacuum drive alternator - good idea? |
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I'm in the early stages of developing my electrical system for my newest project. I'd like to build as light as possible for STOL. Initially considered SD-8 but loads and amp output at economy cruise too close for day/night VFR.
I've been moving toward the BC410-H (SD-20). From the little bit of searching I've done, most installations are for all-electric planes as a backup alternator.
Are there any known issues of using the BC410-H in single (one only) alternator mode?
It seems there are a lot of advantages not having brackets, belts, and mounting hardware.
Thanks
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Thanks too much,
John Bickham
Mark III-C w/ 912UL
St. Francisville, LA
I know many pilots and a few true aviators. There is a distinct difference that I have the greatest respect for. |
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recapen(at)earthlink.net
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| Posted: Wed Mar 23, 2016 10:07 am Post subject: Single vacuum drive alternator - good idea? |
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John,
I'm using that setup as my backup alternator. Each flight, I test it as part of my pre-take-off checklist. One time, it wouldn't come up at all - the plastic shear-drive gear had failed. I would treat it like we used to treat our vacuum pumps - rebuild frequently.
If you're primarily day-VFR - with an occasional night landing, you're probably OK - as long as your cruise loads are not over 25 amps or so.....I think that unit will put out about 28-30 amps with the primary regulator.
YMMV!
Ralph Capen
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