Hit and Miss Engine, M91, with 12V Generator and Supercap

Hello Everybody,
see my extension to the M91 hit and miss engine with a DC generator 12 V.
I got this 12V motor recommended by from Steve Jordan, thanks Steve!
I can generate 3.5 W without boiling the water and 7.2 W with boiling water.
I changed the cooling system to have an opening at the highest point, so I can utilize water boiling cooling.

 I have added a supercap to stabilize rpm and voltage. Without supercap, I cannot drive 7.2 W output power, but with supercap very good stability!
Fuel consumption has been measured: from fuel (gazoline) to electrical output the total efficiency is 4.1 % with 7.2 W output power. Generator efficiency is about 60% in this operating point and belt efficiency I don't know. So I estimeted motor efficiency to about 8%. Not overwhelmig good, but better than my stirling engine.

Видео Hit and Miss Engine, M91, with 12V Generator and Supercap канала dude007