I think I'm right in saying that diesel engines do use less kg of fuel per hour for a given output - but they also do weigh more
Does anybody know how much a modern diesel weighs compared to an equivelent ancient Lycoming lump?
Air cooled, because unless one does spacecraft-quality plumbing (which won't happen) it will leak and if it leaks you have an near-immediate engine failure.
Good point. However, the diesel engines in question are liquid cooled; I guess because of the car origins.
Look interesting:
http://www.centurion-engines.com/c40/c40_start.htm