Peak EGT (exhaust gas temperature) in piston powered aircraft provides
the best fuel economy and efficiency. (ITT-InterTurbineTemp and EPR
-Exhaust Pressure Ratio apply to turbine and jet powered aircraft
engines). In reciprocating piston powered aircraft, it's part of the
leaning process a pilot uses by adjusting the mixture control as the
aircraft climbs to thinner air. In most instances, peak EGT is used as a
reference at which point the mixture is enriched by approximately 50
degrees. The result provides an economical compromise and an engine that
"sounds" right. Leaning beyond peak EGT causes the engine to cough,
sputter and, if leaning is continued, the "big fan" will stop and the
aircraft will become a glider.
I have no idea what this has to do with LBC, but I wanted to answer your
question, Ken - especially since you sent me those KangolReflex labels!!
Bob Fabie
Fredericksburg, Va
'75 TR6 (normally aspirated)
[demime 0.97c removed an attachment of type text/x-vcard which had a name of
rmf3860.vcf]
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