CH> I have often considered using a V-8 automotive engine with much
 CH> altered cam and ignition timing running at 540 RPM (PTO speed) to run
 CH> a generator.  By careful selection of components, it would probably
 CH> be made to be quite efficient at that speed. Maybe even run it off
 CH> piped-in natural gas for co-generation.
 AC> Real David and Goliath! I suppose you are not proposing that an auto
 AC> generator be the partner!! But could you easily find a suitable
 AC> generator??
Perhaps a -bank- of alternators feeding a large bank of batteries?  Just add 
an inverter.  U.S. Navy used to use batteries as back-up for the nav 
equipment...120 VDC to a motor, which was direct-coupled to a 120 volt/400 Hz 
generator.  This was, of course, superseded by a solid-state inverter.
Kevin
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