Dick Maddux
Joined: 24 Jun 2008
Posts: 516
Location: Milton, Fl
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 Posted: Wed Oct 27, 2010 6:10 am Post subject: Kitfox-List Digest: 14 Msgs - 10/26/10 |
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> The above is simply false information. There is NO information by Rotax that says
you can not cruise your 912 series engine at less than 5000 RPM. Think about
it, an engine you were required to run at 5000 RPM or more ( about 75 %
power or more ) all the time would be pretty useless in many sport airplanes.
Since this issue has come up a lot, and Lowell constantly gives people bad advice
on this, I took the time to look this up in the Rotax manual and service
bulletins. What Rotax says is to avoid high RPM settings with high throttle
settings which would lug the engine.. ( This is good advice with any aviation
engine. ) So you can take Lowell's " I heard an an airshow " advice or you
can operte your engine according to what Rotax tells publishes<
Mike,if you took a few courses on the Rotax engine vs trashing Lowells correct information on the engine,that might help. All 3 courses (Lockwood,MLSA...and Eric Tucker ) I have attended on this engine have stated very clearly to keep the rpm (at) 5000 rpm or above because that it is where it is designed to run. It is better for both the engine and the gearbox This IS NOT a Lyc or Cont engine so don't compare it as such.
Dick Maddux
912UL
Milton,Fl
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