Proper Leaning Procedures in Mountain Flying

[BYUFlyr]

Dunno what your image was supposed to be, byu; you'll have to be more creative.

Sorry, the image was supposed to be a thumbs up, but I'm computer retarded... it took me a few weeks just to figure out how to get the quote thing working right.

 

[uwochris]

avbug,

As far as the ground leaning goes- if you taxi with a power setting of around 800-1000 RPM, will leaning have any effect? In this case, you're not idling, so the main jet will be used in this case, correct?

Thanks,

Chris.

 

[nosehair]

Leaning on the ground for idle is futile; you're not leaning the idle mixture, as that can only be leaned by the mechanic while working on the carburetor...you don't control it.

I've seen this before, and it begs the question: "Why do the plugs foul (appearently) in some (higher-performance) engines if I don't lean during taxi?"

On hot, high DA days, If I don't lean a bit after starting a Seminole or a 172RG, by the time we do instrument/radio checks, and taxi to run-up, the plugs are fouled and have to be cleaned via the high rpm/excessive lean method. If we pull the mixtures back about a third right after start, the run-up is fine.

It seems that I am doing something with the leaning. Can anyone explain?