Actually model Diesel engines are not Diesel's. To be a Diesel engine it must operate at a constant pressure during the power stroke. To do that you must inject fuel into the engine at a constant rate during the power stroke. I am intrested in model Diesel's as an intresting power plant even if not a true Diesel. But the cost of fue puts me off. If they ran cheap fuel oil I would buy one right away.

Seems some one posted a one off true Diesel engine a while back.