Lister Stationary Engine - SR1 Reverse Rotation Feb' 2019 - checking the speed governor under load

Applying varying electrical lighting loads via the 12 volt belt fed alternator connected to a UK mains AC inverter. The loads were very low at 350 watts (1/2HP) as the injector timing is intentionally retarded to reduce knock and at low RPM the engine doesn't make much power as a consequence. I was more interested to see if it loaded up the engine too much.