201er Posted July 7, 2011 Report Posted July 7, 2011 I'm surprised to find Mooneys have a higher max RPM than many others or at least the ability to cruise up to 2700. What makes it different? At higher altitudes to get much power at all, you have to be at 2700RPM. Is there anything wrong with cruising at 2700? Does it wear the prop/engine out faster? Also I noticed the McCauley on my 201 is really wide compared to most planes. What exactly does this do? Round tips reduce wingtip vortices on prop? Quote
KSMooniac Posted July 7, 2011 Report Posted July 7, 2011 Nothing wrong with cruising at 2700 RPM from a mechanical perspective. The actual prop efficiency at cruise speed and 2700 RPM is likely lower, though, so you might do some careful speed runs at various RPMs and you very well could find that you'll cruise a bit faster at something less than 2700 RPM (already assuming wide-open throttle). My new MT prop is optimized for a much lower RPM, so I cannot develop as much efficient power at cruise altitudes as I would like... Quote
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