Thanks Mark,

Is that 7600kJ the chemical energy in 500ml of fuel? If so, do you have a good sense of how efficient a small motor is? I recall something like 30-40%. 2.2MJ still makes an ICE pretty attractive.

The whole flywheel idea is to be able to buffer your ICE or electric motor energy output so that you can run the motor at 100% until the flywheel is at its max design speed (Im thinking more like hundreds of RPM). Then you can extract energy from the flywheel as needed by a weapon or whatever and have the motors continue to pump restoring energy into it. Then you arent limited by the peak power output of the motor for each weapon use.

So now I must think on the ICE powerplant instead of the electric motor. As a mechanical engineer, that suits me just fine

Mack