As speed of rotation restores to the preset one, overadjustment can also take place, i.e. the slide valve may
overshoot the equilibrium position one or two times.
3.2.
FORCE
D CHA
NG
E O
F
PR
E
SET S
P
E
E
D OF ROTATION
OF
AIRSCREW
A
N
D
ENGINE
3.2.1. Change of Engine Speed of Rotation
The airscrews are adapted for changing the engine speed of rotation upon the pilot's will both in flight and
on the ground without touching the throttle quadrant. The engine speed is changed by varying spring tension* To
achieve this, the governor is provided with toothed rack (4) (Ref. Fig. 5) meshing with control shaft (55 carrying a
roller or lever.
In its turn the roller or lever is connected by a rod or cable with a control knob.
When the governor control knob is pulled, shaft (5) turns clockwise. Rack (4) lifts to decrease spring
tension so that the engine equilibrium speed of rotation decreases since spring tension force will become equal to
weight centrifugal force at lower speed of rotation of the governor drive shaft.
When the control knob is pushed, shaft (5) turns counterclockwise. Rack (4) lowers to increase tension of
the spring so that the equilibrium speed of rotation rises, since spring tension force and weight centrifugal force will
become equal to each other at a higher speed, of rotation of the governor drive shaft.
3.2.2. Shifting Airscrew Blades to Lower Pitch
To shift the airscrew blades fully to low pitch, push the governor control knob all the way forward. Now shaft
(5) (Ref. Fig. 6) turns counterclockwise up to the low pitch stop. The spring makes governor slide valve (6) move to
the lowermost position whereat high pressure oil from the governor pump is fed. to the airscrew through passage
(1) for shifting the bladea fully to low pitch, which corresponds to maximum speed of rotation of the engine.
3.2.3. Shifting-Airscrew Blades to Higher Pitch
To shift the airscrew blades fully to high pitch (decrease engine speed of rotation) without touching the
throttle quadrant, pull the governor control knob all the way backward.
Now the control ahaft gear turns clockwise up to the high pitch stop. Rack (4) (Ref. Fig. 7) moves upward
and the weights shift governor slide valve (6) to the uppermost position whereat the airscrew cylinder space is
connected, via passage (1) with the return line and the counterweight centrifugal forces move the airscrew blades
fully to high pitch which corresponds to minimum speed of rotation.
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...
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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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