vol 4

Question 1

normal and mech gov positions

Answer 1

propeller governor control switches

Question 2

selects the desired master propeller

Answer 2

synchrophase master switch

Question 3

used during propeller indexing procedures

Answer 3

prop resynchrophase switch

Question 4

resets the propeller governor to 106 percent rpm in alpha range

Answer 4

fuel governing switches

Question 5

when reference circuit is opened, normal governing and sychrophasing modes are not allowed

Answer 5

synchrophaser disarming switches

Question 6

reflects the actual throttle lever setting

Answer 6

throttle anticipation potentiometer

Question 7

reflects actual engine rpm

Answer 7

tachometer generators

Question 8

for every revolution of the propeller, a voltage pulse is produced

Answer 8

pulse generator

Question 9

disconnects the drive gear from the lever

Answer 9

clutch

Question 10

locks the position of the lever

Answer 10

brake

Question 11

reference and control windings cause it to rotate

Answer 11

speed bias motor

Question 12

recenters the motor when there are no error signals

Answer 12

feedback potentiometer

Question 13

transmit and receives signals from several components for propeller governing

Answer 13

synchrophaser unit

Question 14

contains a master and a slave channel

Answer 14

master synchrophaser board

Question 15

contains slave channels for the #1 and #4 propellers

Answer 15

double slave board

Question 16

receives, compares, and modifies input signals

Answer 16

power amplifier board

Question 17

furnishes the necessary power for components and relays within the sychrophaser unit

Answer 17

power supply board

Question 18

its signal drives the speed bias to correct for a 2% speed change

Answer 18

compensating network

Question 19

what are the 3 propeller governing modes of operation?

Answer 19

mechanical, normal, synchrophasing

Question 20

what two functions does normal governing mode add to supplement mechanical governing?

Answer 20

throttle anticipation and engine speed stabilization

Question 21

what is the only major moving part in the SGT engine?

Answer 21

rotor assembly

Question 22

which propeller subassembly transfers hydraulic fluid to the inboard and outboard sides of the dome positions?

Answer 22

pitchlock regulator

Question 23

what are the primary components that lock the propeller dome position and blades in a fixed position?

Answer 23

pitchlock regulator, stationary pitchlock ratchet, and rotating pitchlock ratchet

Question 24

name the 3 main systems that supply hydraulic pressure to the propeller

Answer 24

main, stand-by, and auxiliary

Question 25

when the backup valve is opened and pressure is routed to the governor pilot valve, the pressure is used to accomplish what 3 propeller operations?

Answer 25

unfeather, reverse, and release the low pitch stop

Question 26

what 2 ways can the propeller be feathered?

Answer 26

moving the condition lever to the FTR position or by pulling the fire emergency handle

Question 27

the condition lever provides what type of signals to the control assembly?

Answer 27

electrical and mechanical

Question 28

when the condition lever is moved to FTR and the alpha shaft rotates, which cam acts through a mechanical linkage and opens the feather actuating valve?

Answer 28

manual feather cam

Question 29

which valve acts as a backup in case the mechanical linkage fails to open the feather actuating valve?

Answer 29

feather solenoid valve

Question 30

what two cams control the unfeathering operation?

Answer 30

manual feather cam and the beta set cam

Question 31

on a constant speed propeller, if propeller speed decreases, what happens to the blade angle?

Answer 31

decreases

Question 32

to prevent an overspeed during constant speed operation, what does the propeller governor do in order to keep rpm constant?

Answer 32

increase blade angle

Question 33

in beta range what moves the pilot valve?

Answer 33

cams and mechanical linkage

Question 34

if the throttle were moved from RVS to GND IDLE, which cam moves the governor pilot valve to increase pitch?

Answer 34

beta set cam

Question 35

what drives the governor flyweights?

Answer 35

propeller rotation throughout gears on the differential gear train

Question 36

during an OVERSPEED condition, what part of the propeller governor moves the pilot valve?

Answer 36

flyweights

Question 37

during an UNDERSPEED condition, what part of the propeller governor moves the pilot valve?

Answer 37

speeder spring

Question 38

routes main pump pressure to hydraulically position the feather and pilot valves

Answer 38

feather solenoid valve

Question 39

can be pinned at 5 degree increments

Answer 39

beta shaft rigging cam

Question 40

when closed, it prevents the pressure cutout switch from stopping the auxiliary pump motor

Answer 40

pressure cutout backup switch

Question 41

contains the beta set cam and alpha shaft rigging cam

Answer 41

alpha shaft

Question 42

primary component for controlling the flow of hydraulic fluid to and from the dome assembly

Answer 42

propeller governor assembly

Question 43

is mechanically actuated by the same lever that mechanically positions the feather valve

Answer 43

feathering actuating valve

Question 44

contains the pressure cutout backup switch cam and beta backup valve cam

Answer 44

beta shaft

Question 45

maintains an initial supply pressure(to the pilot valve) of 100 psi over- pressurized sump pressure by porting excess fluid back into the sump

Answer 45

low- pressure relief valve

Question 46

combines the main, standby, and auxiliary pressure pumps' output to increase pitch lines during propeller feathering

Answer 46

feather valve

Question 47

in the beta range, the speeder spring tension is increased to between 109 and 113% rpm at the same time as mechanical linkage moves into position to control the __________.

Answer 47

pilot valve

Question 48

allows either a decrease or increase in pitch pressure (whichever is higher) to be ported to the low pressure relief valve without allowing cross flow

Answer 48

selector valve

Question 49

cancels blade movement at the proper blade angle

Answer 49

beta follow up cam

Question 50

changes speeder spring tension when the throttle is moved into the alpha or beta range

Answer 50

speed set cam

Question 51

indicates when the propeller is in the beta range

Answer 51

beta indicator cam

Question 52

transmits throttle lever movement to the feather valve linkage

Answer 52

input control lever assembly

Question 53

protractor cam

Answer 53

beta backup valve cam

Question 54

transfers NTS plunger movement to the feather valve linkage

Answer 54

NTS control lever

Question 55

schedules a desired blade angle in the beta range

Answer 55

beta set cam

Question 56

mechanically feathers the propeller

Answer 56

manual feather cam

Question 57

relieves built up air pressure to prevent seals from leaking

Answer 57

cover breather

Question 58

limits system pressure to 1,300 psi above pressurized sump pressure

Answer 58

high pressure relief valve

Question 59

reflects actual propeller rpm

Answer 59

flyweights

Question 60

in the alpha range, the tension is set so the pilot valve will be in the neutral or on-speed position at 100% rpm

Answer 60

speeder spring

Question 61

when closed, decreased-pitch pressure will not be allowed to the selector valve and subsequently to the low pressure relief valve

Answer 61

backup valve

Question 62

contains the various cams, valve, and switches that control the flow of hydraulic fluid to and from the dome assembly

Answer 62

valve housing

Question 63

illuminates the NTS indicator light when closed

Answer 63

NTS switch