Originally Posted by JohnAV8R
Earl, good reference on the KMD
From the above...
"No way would the KMD achieve its
peak of 0.48 BHP at 19,500 RPM with one of those. A
quick comparison with a published test of the
contemporary Bugl Mk 2 shows that it also peaks at the
same RPM, but gives over 20% more power. Unlike the
Bugl, the KMD’s torque curve drops off quite significantly
as it approaches and then passes the BHP peak. Not
surprising really, you get what you pay for.
As a final check potential candidate racing propellers were
tested. The APC 7x6 recorded 16,400 RPM and Thunder
Tiger 7x5.5 maxed out at 16,800 RPM."
John left out the part about that they were discussing the old style large paddle props of the time period that people were using for combat at the time. Thus the those props would be below the RPM range that the engine was designed for.