Re: Onan Engine...


In a message dated 9/19/2007 11:30:10 A.M. Central Daylight Time,
lansair@... writes:

Hi: Onan engines are reliable because they were designed to run for hours on
end day after day.

While this is true enough, engines used in an aircraft are required to work
hard during the climb generating higher heat, then hit a constant period at
cruise followed by sudden cooling during the descent. Engines which are
successful running continuously at a constant rpm often get cranky when subjected
to continuous heating/cooling cycles like this. Even with proper piston
aircraft engines we are warned about shock cooling.
A number of Onan drivers experienced warped heads likely due to
overheating... so, greater care should be taken in properly baffling the engine and in
flight operations. The Q1 has just enough power to do its job but you can't get
frisky with the engine.

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