IGNITION SYSTEM - DESCRIPTION AND OPERATION
1. GENERAL
The ignition system ensures well-timed igniting of the working mixture in the cylinders,
The M-14P engine ignition system includes two M-9F magnetos, SD-49SMM spark plugs, shielded ignition
harness (magneto selector switch and high-tension starting coil KP-4716).
2. DESCRIPTION
The mixture is ignited in the cylinders by a high-tension apark generated, in two magnetos mounted on the
rear cover of the engine crankcase,
High-tension current from the magneto is transmitted to the spark plugs via high-tension cables enclosed in
a shielded ignition harness* Both magnetos are of the LH rotation type. The RH magneto serves the rear spark
plugs and the LH one, the front spark plugs.
To ignite the working mixture in the cylinders at starting, starting coil KT-4716 is included in the system.
Current from the airplane eloctrica] system passing through the primary winding of coil KF-4716
magnetizes its core and the starting coil breaker points, previously open, close the primary winding to ground.
Magnetic field disappearing with current, induces high voltage in the coil secondary winding, which is needed to
generate spark between the spark plug electrodes.
High voltage is fed to the starting electrode of the magneto rotor and through the dis-stributor electrodes to
the cylinder spark plugs.
When the engine accelerates to a speed of 1? to 14 % (300 to 400 r/min), the magneto is switched on and
starting coil KP-4716 is cut out. In this case high voltage from the secondary winding of the magneto transformer is
fed to the working electrode of the rotor and then through the distributor electrodes to the cylinder spark plugs.
The magnetos are cut in and out by means of a selector switch the knob of which can be set to either of
the following four positions:
"0" - both magnetos are off.
"1" - the LH magneto ia on and the'RH magneto is off.
"2" - the RH magneto is on and the LH magneto is off.
"1+2" - both magnetos are on.
Содержание M-14P
Страница 6: ...19 Engine M 14P Front View Figure 1...
Страница 7: ...20 Engine M 14P Rear View Figure 2...
Страница 27: ...40 Arrangement of Airborne Tools in Case Figure 1...
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Страница 44: ...57 Engine M 14P Test Run Chart Figure 201...
Страница 67: ...80...
Страница 163: ...176 Crankshaft Thrust Ball Bearing Front Cover Figure 1 Intermediate Crankcase Figure 2...
Страница 166: ...179 Intermediate Grankcase Front Portion Figure 3 Intermediate Crankcase Rear Portion Figure 4...
Страница 173: ...186 Front view Cylinder Figure 1 Rear view...
Страница 174: ...187 1 Inlet Valve 2 Outer Spring 3 Inner Spring 4 Split Retainer 5 Valve Plate Inlet Valve Figure 2...
Страница 178: ...191 Intake Pipe of Cylinders Nos 4 5 and 6 Figure 4 Piston Piston Rings and Piston Pin with Plugs Figure 5...
Страница 180: ...193 Timing Mechanism Schematic Diagram Figure 6 Cam Plate Figure 7...
Страница 189: ...Blower Longitudinal Section View Figure 1...
Страница 191: ...Rear view Mixture Collector Figure 2 Diffuser Figure 3...
Страница 194: ...1 Plate 2 Spring 3 Plate 4 Gear 5 Accessory Drive Shaft Blower Coupling Figure 4...
Страница 204: ...Oil Sump Figure 4...
Страница 216: ...Engine M 14P Gear Train Figure 1...
Страница 247: ...Carburetor AK 14P Operation Diagram Figure 1...
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Страница 267: ...OPERATIONS AND TECHNICAL REQUIREMENTS CORRECTIVE ACTIONS CH ECKED BY Carburetor AK 14P Right Side View Figure 201...
Страница 273: ...Carburetor Altitude Control Needle Position Versus Barometric Pressure Barometric Graph Figure 203...
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Страница 288: ...T t en 0 CO 0 T K D fi h0 Ol f 01 3 0 F4...
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Страница 309: ...SPARK PLUG SD 49SMM MAINTENANCE PRACTICES 1 LIST OF TASK CARDS Title Task Card Uo Removal 201 Installation 202...
Страница 344: ...Generator Electrical Connection Diagram Commutator Side View Figure 3 1 Main Pole 2 Interpole...
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