"basilisk" wrote

Most two strokes are single cylinder that rely on crankcase pumping
action to move the fuel/air mixture, if you go to a multiple opposed
cylinders, you will have to provide a slave cylinder or roots type blower
to move the air.

Or you have each pair of cylinders and pistons moving outward and firing at
the same time, and have each opposing pair separated from the other opposing
pairs. It would still pump like regular single lung 2 strokes, then.

A 6 cylinder opposing pair would be an interesting 2 stroke engine. 3 power
pulses per revolution, and two pistons firing on each pulse. This concept
could mean that each pair could be designed basically identical, and bolted
together. You could add as many pairs as you wanted, to get the power
output you want. 6, or 8 or 10 cylinders! Cool! A 10 cylinder engine
should be as smooth as a turbine engine, but probably with the fuel flow to
match! ;-)

You could keep the cylinder sizes very small, and the engine very narrow but
long. This might be a concept to explore, I think.

If you wanted, you could have each pair rotated a little, somewhat like a
multi layer radial engine, for cooling mainly. It would probably make it
more complex than the benefits would justify.
--
Jim in NC