oil temperature gage prior to take-off if outside air temperatures are very
cold. After a suitable warm-up period (2 to 5 minutes at 1000 RPM), ac-
celerate the engine several times to higher engine RPM. If the engine
accelerates smoothly and the oil pressure remains normal and steady,
the airplane is ready for take-off.
When operating in sub-zero temperature, avoid using partial carbu-
retor heat. Partial heat may increase the carburetor air temperature to
the 32° to 70° range, where icing is critical under certain atmospheric
conditions.
Refer to Section VI for cold weather equipment.
2-13
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