Piper Commanche vs Money 201

On Fri, 28 Nov 2003 13:17:38 -0000, "Paul Sengupta"
wrote:

I will have to try leaning to LOP on higher power, but since I don't
have an analyser to see what's going on I'm a bit reluctant. I take the
view that at less than 65% power I can't screw it up whatever I do
with leaning.

Paul,

Since you don't have EGT sensors, based on my experience with
multi-cylinder sensors and several Lyc IO360 engines, I am virtually
certain that you are running LOP with your method, unless your injectors
are way off.

But there are only a few points that can give you a clue.

In my experience with this engine, when I get to about 50° LOP, my IAS will
have dropped 8 knots or so (and CHT's will also come down after a while).
At peak IAS for the power setting, you will be comfortably ROP, and not in
the 25°-50° ROP "danger zone".

On my engines, if I lean slowly to roughness, and then enrichen just a bit
(as Lycoming recommends!), I will be well LOP.

HTH,

Ron (EPM) (N5843Q, Mooney M20E) (CP, ASEL, ASES, IA)