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#14
April 30th 07, 09:58 PM
posted to rec.aviation.owning
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Fuel Flow and Peak EGT
Mike Noel wrote:
That brings up an interesting point. I think the Lycoming recommendation previously was 75% power for unrestricted leaning. Lately I have seen 65% as a recommendation. Anyone have any background on the two different limits? Lycoming has always given recommended limitations on operations. 75% in cruise was always the common limit for leaning. Other documents have given lower numbers with the phrase "for maximum service life". Here's an example from a Lycoming Key Reprint article on leaning : 8. For maximum service life, maintain the following recommended limits for continuous cruise operation: a. Engine power setting — 65% of rated or less. b. Cylinder head temperatures — 400˚ F. or below. c. Oil temperature — 165˚ F. — 220˚ F. Available at http://www.lycoming.com/support/tips...Operations.pdf John Galban=====N4BQ (PA28-180) -- Message posted via AviationKB.com http://www.aviationkb.com/Uwe/Forums...ation/200704/1 
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