Monticello Flying Club Pilot Transition Manual: Mooney M20F
Page 21 of 42
DESCENT PERFORMANCE
The original 1967 Mooney POH does not have a descent chart. It is important to
avoid unnecessary engine shock cooling during descent (while taking full advantage of the
reduced fuel burn available). Avoid shock cooling the engine by decreasing propeller speed
to the lowest allowable cruise rpm and subsequently making several gradual reductions in
manifold pressure.
Pay close attention to the engine monitor during descent to avoid shock cooling. The
engine monitor can warn the pilot of shock cooling conditions if it is set properly. Refer to
the engine monitor manual for details on using that instrument.
Pay attention to the RPM restrictions on continuous operation, but the general
technique of descending with low rpm/moderate MP rather than higher rpm/lower MP, will
help eliminate piston ring flutter and maintain higher cylinder head temperatures.
LANDING PERFORMANCE
Landing performance can be determined from the POH. According to the charts, in
the worst-case scenario (full weight, high density altitude) the landing distance is 2,175ft. If
you are landing on a field shorter than this you should calculate your landing distance from
the chart. Also note that the airspeed upon crossing the runway threshold is lower for short-
field operations compared to normal operations.
Keep in mind that density altitude affects
performance.
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