Beemer
Joined: 26 Aug 2006
Posts: 87
Location: Middle Georgia
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 Posted: Mon Aug 11, 2008 6:52 am Post subject: John Deere dynamo |
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Hi all,
I have a question concerning using a dynamo at higher engine speeds. I am looking at reducing my FWF weight, and considering some of the smaller alternator installs. I am currently using a ND IR alt, which is fine, but in lurking around, I'm becoming rather concerned about the weaknesses of these units. Unfortunately, not much else is available in this class; i.e. size and weight. All of the externally regulated alternators I've seen are much too large and heavy for my application.
I'm installing Z-13RB on my new plane, and plan on incorporating Z-24 alt disconnect contactor in line with the OV module.
However, my Suzuki G10 three cylinder runs at 5000rpm in cruise, and 5500rpm on takeoff. The JD AM877557 PM alt puts out 20amps at 2500rpm. I'm running double that. Short of re-doing my belt drive setup with a 12 inch pulley, what are the ramifications of running this little alt at these speeds? by the looks of it, the small pulley on the unit would spin it up to 10,000 rpm. I'm aware of the mechanical limits (bearings, etc), my question concerns the power output to the system.
Any help would be much appreciated.
Bradley
Kitfox 2/3
Middle Georgia
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| Description: |
| John Deere AM877557 dynamo |
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_________________
Beemer
KF2 (and now an M3!)
Suzuki G10 three-banger
Middle Georgia |
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