Hey, that's a project I'm interested in too!
Only my idea was to build a gas powered generator that gives 220-230V AC 50Hz.
Key problems I identified: find a suitable generator, match and control the running speed of the motor and generator, voltage and frequency regulation.
Ideally the result would be mounted to a heavy steel frame, painted green and have a bakelite control panel with analog volt and ampere meters and a few old-fashioned surface-mount receptacles.
