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Aircraft general knowledge
8.8.1.4 Volume ......................................................................................... 725
8.8.1.5 Compression ratio ............................................................................ 726
8.8.2 Aeroplane engine (Boxer) ...................................................................... 726
8.8.2.1 Cylinders…. ....................................................................................... 726
8.8.2.2 The structure of the engine…............................................................ 727
8.8.3 4-stroke principle .................................................................................. 728
8.8.3.1 Engine operation…. .......................................................................... 729
8.8.3.2 Premature ignition and detonation…. ............................................... 730
8.9 The carburetor ........................................................................................ 731
8.9.1 Carburetor construction ........................................................................ 732
8.9.2 Carburetor ice ....................................................................................... 735
8.9.3 Carburetor heat ..................................................................................... 736
8.9.3.1 Operating the carburetor preheating…. ............................................ 737
8.9.3.2 Practical use of carburetor heat........................................................ 738
8.9.4 Engine cooling ....................................................................................... 738
8.9.4.1 Engine cooling by oil and oil cooler…. ............................................... 738
8.9.4.2 Engine cooling by gasoline ................................................................ 739
8.9.4.3 Engine cooling by air… ...................................................................... 739
8.9.4.4 Air supply and alternative air supply. ................................................ 739
8.9.4.5 Cowl flaps. ........................................................................................ 740
8.9.5 Air-gasoline mixture .............................................................................. 741
8.9.5.1 Leaning…. ......................................................................................... 741
8.9.5.2 Using Mixture Control ...................................................................... 743
8.9.5.3 Fuel injection… ................................................................................. 744
8.9.6 Engine lubrication ................................................................................. 744
8.9.6.1 Wet sump ........................................................................................ 744
8.9.6.2 Dry sump. ......................................................................................... 746
8.9.6.3 Oil..…. .............................................................................................. 746
8.9.6.4 Possible faults in the oil system ........................................................ 747
8.9.7 The ignition system ............................................................................... 747
8.9.7.1 Function of the ignition system ........................................................ 748
Flyveteori PPL(A)(UL)/LAPL Henning Andersen, Midtjysk Flyveskole© marts 2026 672
