Opps!!! I hit the wrong key. Sorry. The maximum output at each RPM was determined to be when the input voltage to the regulator dropped to about 13.3v. Test alternator was driven by a variable speed lathe.
RPM Volts Amps Watts
350 12.0 .99 12
400 12.0 1.88 22.5
450 12.0 2.71 32.5
500 12.0 2.93 35.2 (Voltage regulator maxed out at 3A)
Using a higher amp rated voltage converter the max output at 500 RPM is estimated at 50 watts and 60 watts at 550 RPM. This higher output is not needed for this, or future projects as the alternator/generator above is more than adequate as is. The project 1/8th scale engine is basically complete, and shows good power at 450-500 RPM. The vintage looking generator frame is in progress. Many, many thanks to all who offered advice on this project and a especial thanks to Flux. THANKS GUYS!