SPARK PLUG SD-49SMM - DESCRIPTION AND OPERATION
1. GENERAL
The spark plug together with the magneto and high-tension cables is intended to Ignite fuel-air mixture in
the engine cylinder.
2. DESCRIPTION
2.1. CONSTRUCTION
The spark plug (Ref. Fig. 1) is a non-detachable, shielded ceramic insulator device.
The working part of the spark plug has central electrode (l) and side electrode (2). Electric discharge jumps
spark gap A of the spark plug through the air gap between the central and side electrodes. Damping resistor (3)
connected in series to the central electrode and arranged inside the spark plug is intended to decrease electrode
erosion and diminish ignition system radio interference,
Contact head (4) is insulated from shell (5) of the spark plug with ceramic tube (6).
The spark plug ahell has a hexagon for wrench S = 22 mm and two threads. Thread B, dia. M14x1.25» is
intended to screw the spark plug into the engine cylinder hole with the use of copper-asbestos sealing ring (7).
Thread C, dia. M18x1, is intended to connect a high-tension cable.
2.2. SPEC
IF
ICATIO
N
S
Damping resistance at a temperature of (25±10) °C,
pressure of 1,0 kgf/cm and relative humidity of (65±15) % ...... From 10,000 up to
1000 ohms
The spark plugs should be tight.
Seepage at a pressure difference of 40 kgf/cm is allowed………. Not more than 1 cm3
during 30 s
Spark generation should be at a pressure of surrounding air
equal to 10 kgf/cm………………………………………………………Continuous
Spark plug mass ............................................... …………………... Up to 0.095 kg.
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...
Страница 39: ......
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...
Страница 249: ......
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...
Страница 293: ......
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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