I sincerely doubt that an engine with the same power to weight ratio as a
diesel truck engine whether it be a 2 or 4 cycle could be made to fly. They
are very heavy. That is how they get their reliability and longevity.

--
Cy Galley - Chair, Emergency Aircraft Repair
Safety Programs Editor - TC
EAA Sport Pilot
"Hoppy" wrote in message
...
Bryan wrote:

2-stroke engines can be just as if not more reliable than 4-strokes.
Look
at the big rigs on the road, a very large number of them are 2-stroke
engines pulling very heavy loads for hundreds of thousands of miles.

Yeah, 2-stroke diesels. Valves, not ported cylinder walls. Pressure
lubrication,
not diluted oil/fuel mist.

2-stroke gassers with big cylinders seize a lot, they just do. Except the
Rotax
in a CH-7, don't know why that worked out so well, when a Mini-500 with
the same
engine is crap.