Originally Posted by
scifi
Never quite understood what ROP and LOP meant. Which Peak are you talking about?
If it is the peak of propeller rpm, then that is not really 'peaky' at all. It increases by about 50rpm then drops considerably as you go from Rich to ICO.
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Rich/Lean of Peak refers to EGT.
Peak EGT is to the rich side of the best economy range IIRC - RPM wise I think that is when you set cruise power (e.g. 2200rpm), lean to peak RPM then keep leaning until RPM falls back to the original set value... however I could be wrong as I've never used that method in practice. ISTR that Best Power is lean to peak RPM then nudge it slightly rich, however my memory is somewhat hazy after several nights without sleep (teething toddler & pregnant wife about to pop No2 - not good
) - happy to be corrected where wrong.
(As said previously, all for NA fixed-pitch props)