Al Gietzen wrote:

 Al if you were to run a 2.85 : 1 redrive your dyno

 runs NA extrapolate to 300 HP at 6000 RPM. That is not a stressful

RPM

for a rotary. That works out to less than 2200 prop RPM. I am sure a
comparable IO-540 or 560 (to get that 300 HP) will weigh in at well

over

your 414 pounds.\

Easy, there; Bill.  My hp curve extrapolates to 300 at somewhere over
7000.  The torque curve is starting to bend down over 6500, so in my
particular case it would probably be at about 7500, but that could be
remedied with a larger throttle body.

But I do agree with your comparative weight assessment.  The all-up
IO-540 install would definitely weigh more; and the CG would be further
back, which in my pusher is also an important consideration.

Al

 
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