Page 763 - PPL-engelsk 2025
P. 763
Aircraft general knowledge
8.12.2.3 Oil pressure and temperature
Oil pressure and temperature are crucial for the
operation of the engine.
After starting the engine, the oil pressure is checked.
Oil temperature should preferably reach the green area
before take-off.
Oil pressure should preferably be in the green area shortly after the engine
starts.
On the Cessna within 30 seconds, otherwise the engine is stopped again.
8.12.2.4 Fuel pressure gauge
The electric fuel pump is switched off, and it is checked that
there is still fuel pressure.
If the aircraft is gravity feed, which is the case for the high-
winged Cessna there is no fuel pressure gauge in the aircraft.
8.12.2.5 EGT
A sensor (probe) is placed in the exhaust on the hottest cylinder and measures
the temperature of the exhaust gas.
You pull the mixture lever slowly until the temperature
peaks, note where it happens (mark it with the yellow
pointer if necessary) and make the mixture richer again,
o
until the temperature is 50 Fahrenheit below the peak
temperature (best power).
Some engines allow you to lean to peak temperature (best economy) during
flight.
Flyveteori PPL(A)(UL)/LAPL Henning Andersen, Midtjysk Flyveskole© 2025 763
