yeah car alternators need high torque engine to spin the necessary speed. could replace the windings with permanent magnets.
But if i built an axial flux alternator similar to a wind generator, a mower motor would have no trouble spinning it up.
put that on top of a mower to charge the battery.
better still ,put a fischer and paykel washing machine motor on it and re wire to 12 volts output through a 3 phase bridge rectifier and regulator. a fischer and paykel washing machine motor has no trouble creating 1000 volts and good amps even at reasonable speeds. there are also ways to reduce the cogging effects of the magnet drag.
sorry guys this has gone way over board from my original question. but i do like to ponder. he he
