Long stroke, slow turning engines ARE still used and designed all the time
in agricultural, industrial, and marine applications. It all depends on
where you want your peak torque at. In an aircraft engine, the best prop
efficiency trade-off is in the 2200 - 2500 rpm range and the most efficient
way to transmit power is via direct drive, hence engines are designed for
the applications in which they are used.

John Stricker

"Bret Ludwig" wrote in message
ups.com...


2. If the Lycoming and Continental paradigm of large displacement
light slow turning engine was so great for aircraft, they would be
great for a lot of other things as well. Teledyne Continental and
Textron Lycoming have absolutely no interest in marketing or developing
their ridiculous museum pieces for any other markets whatsoever. The
reason is simple, no one likes being subject to ridicule. Which they
know would be the case.