On Sun, 23 Jan 2005 21:00:53 -0800, Tim Wescott wrote:
Why is it that reed valves are so successful in high-performance
motorcycle two strokes yet are only used in teeny 'sport' class model
airplane engines? Is it just because you can't get suitable reed
material in such small sizes?

Nope, not that reason. Reeds give the greatest benefit in low-RPM torque,
in a 2-stroke engine. Since a model airplane engine never runs at that
low RPM, there's no need for them.

Inquiring minds want to know.

There ya go.

Dave Hinz