Those are not true diesels, a lot of model aero engines are termed diesels but are better refered to as compression ignition engines. I expect the OS engien has ABC cylinders and a ringed piston which may not give the compression needed for this type of diesel to work.
There are very few models or true diesels due to the problems of making small scale injectors and pumps to give the high pressures needed.
J
There are very few models or true diesels due to the problems of making small scale injectors and pumps to give the high pressures needed.
J