Yes, one can deduct different modus operandi re all these engines and their limitations from their respective tables.
Which had me recheck the ones for my engine, lo and behold…
27"/2200RPM numbers might be doable (65% power)
@hazek is right, one can go up to 5", not sure why I had this number 4 in my mind. Any of us better check the respective tables anyway 😉
Jim Petty has created a super and free app for iOS called AircraftPower. One enters the engine type and can then play with all possible combinations, an interesting exercise for sure.
Example:
I rely on the Lycoming’s Operator’s Manual for my engine. First of all it says this:
The POH even refers to this:
And then for power settings we have these three tables:
On the left side you can see permissable RPM vs MP combinations and how much HP they would produce at maximum power ROP mixture.
This is about 170hp at sea level and about 63%:
Other than a few Mooney M-18 Mites and M-10 Cadets, aren’t they all M20s? Those in combination are less than 350 planes.
Far out majority (over 11,000) are M20’s
Rest:
-283 M18 Mites
-36 M22 Mustangs (most of which are still in service)
-38 Ercoupes produced by Mooney as the A2
-59 M10 Cadets (based on the Ercoupe)
-and a handful of prototypes that never went into production.
