Leaning for taxi/takeoff at high density altitude airports
Asked by: Chris Carlson 6509 views Aircraft Systems
Prior to flying this aircraft, i have only flown a fuel injected cessna 172 at low elevation, low temp airports. Now i am flying a 172s at 3000ft and 100 degrees outside. I feel there is a problem with the mixture, but with my limited experience Im not sure.
For RPMs below 1400 the mixture needs to be almost fully aft, but at this mixture the engine will die if power is added much above 1600. I am leaning after startup per the cessna procedure of first going to 1200, finding best power, and then reducing to 1000. If i go to 1800+ rpm, the mixture is put to about 1/2" aft from full. At this mixture, the engine will not operate below 1400 without choking and getting near quitting. The engine will not idle (below 1000rpm) at any mixture setting.
is this normal?
the aircraft just came out of a 100 hour and nothing was changed on the mixture, as i thought it might have been. This leads me to think its normal?
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