Well the model build has now started, the first part of the model that I building and completing is the electronics for both the test build of the engine and final full build it requires the same electronic circuits.
This photo shows the power supply circuit under devlopment test, and it works quite well, it needs min voltage of 10.5V at 65mA no load to run, but 13.5V with at least 3A supply would be better.
This photo is the complete electronics needed to power the engine with a supply voltage checker, 13.5V = good and 10.5V = bad.
The geared motor is also running under no load at 115mA at 6Vdc, i will most likely run the motor at 2 - 2.5Vdc at the end of the day.
R