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Aircraft general knowledge

8.9.7.7 Stopping the engine

We stop the engine after a flight by pulling out the mixture and thereby cutting

off the fuel supply. If we tried to stop the engine in the same way as we stopped

the car engine, namely by turning the key, we would find that the engine would

smell bad and maybe ignite a couple of times before stopping rotation. rotation
before the stop it would be sucking fuel into the system and wash the oil off the

cylinders.

You must be careful if you want to turn the propeller, for example, because if a

wire is broken or the switch does not close, the engine will start - if the mixture
is rich.

If the mixture is lean, the aircraft engine should not start. But there might be just

the right amount of vapor to get it to light and spin once or twice.

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8.10 Other engine types

8.10.1 The diesel engine

100LL aviation fuel has become expensive to use, and our engines are not

designed to be particularly fuel efficient. This has created a need for alternative
solutions.

Flyveteori PPL(A)(UL)/LAPL Henning Andersen, Midtjysk Flyveskole© 2025 750