Dave,


I was not doubting the RPM Wayne quoted; just his remark stating this Enya engine is particularly powerful.

I recall an engine review for the Enya .53 in MAN, some time in the '80, quoting RPM in the high 13Ks, on usable propellers...
...And all this without the super-charging of YS engines.

This .46 is making reasonable power for a normal four-stroke; not a commendably high power.