propa Flashcards

1
Q

what is the manufacturers name and designation?

A
5- Major modifications to the original prop design
4- No of blades
H- Blade shank size
60- SAE spline size
77- Minor modification size
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What 3 pubs state the fluid for the prop

A

Flight manual
F700
FOLS
Aircraft servicing form

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Definition of the ground range of the co ordinator

A

0-34 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the force that dries blades to a fine angle

A

Centrifugal twisting force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Force that drives the blades to a coarse pitch

A

Aerodynamic twisting force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what action needs to be done before removing the prop nut

A

Check torque. If there is movement, prop is considered to be loose on the shaft

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Purpose of a stop ring

A

Provides a mechanical stop at 86.65* for feather and -14 for maximum reverse blade angle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the name of the component on dome that meshes with blade segment gears

A

Rotating cam has a bevel gear that meshes with blade segment gears

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Where do you find the shim thickness

A

Written on the dome shelf

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the purpose of the feather latches on the bottom of the dome

A

This will lock the prop to feather

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

4 major parts of a spinner assy

A

front spinner
rear spinner
bulkhead
afterbodies

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

major functions of the barrel assy

A

retain blades
secure the prop to the shaft
transmit the drive from the engine to the blades

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

when will PP2 pressure assist PP1

A

large loads

main pump fail

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

purpose of sump relief valve and at what pressure

A

maintains a positive pressure to prevent cavitation within the pressurised system and
provides a constant reference pressure
mounted between P.S and A.S, 20 psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what are the 5 pumps and how much psi

A
PP1- 20
PP2-40
Aux pump-15
Main scav- 20
Aux scav-15
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the angle of the blades when they are at the feather position

17
Q

2 conditions that move the feather valve to feather

A

e handle

nts

18
Q

where is the standby filter located

A

top of the valve housing

19
Q

what is the precaution with the no 1 blade

A

dont turn the blade cuff as the drive cog beta gear could be close to the end of its run

20
Q

2 functions of the manual feather cam

A

mechanically position the feather valve to the feather position when the e handle is pulled

cam out the nts when the throttle is retarded below 25* co ord

21
Q

what are the 2 flight deck controls that rotate the alpha shaft

A

throttle

e handle

22
Q

what is the purpose of the beta set cam

A

sets blade angle in the ground range
provide beta follow up in the flight range and guarantees a minimum of 23 deg Blade angle when the throttle is at take off

23
Q

what is the purpose of the pressure cut out switch

A

prevents termination of the aux pump before 74* BA should pressure surges occur

24
Q

What is the blade angle range when the beta light comes on

A

Beta range is 10*

25
Precaution when separating valve housing and control housing
ensure the pin is fitted to prevent damage
26
Where is the low pitch stop located
front of the dome
27
True or false auto feather tss mechanically position the valve??? the prop cannot fully feather is the aux pump fails? The e handle cannot feather if mechanically at the co ordinator fails???????
false true false
28
3 systems that will send the prop towards auto feather
e handle nts tss feather button
29
what will happen if the prop is unfeathered without pressing pco button
it will hunt towards 46.65/45
30
how do you measure blades
using the blade reference station, dimple and dimpled slot in loc foam. blade alignment reading number is used to calculate if a blade has been bent
31
BA used for setting up protractor in valve housing
86.65 feather angle
32
2 methods of holding pitchlock teeth disengaged
cam out ring | hyd pressure
33
what forces the engagement of the 2 teeth of the rotating and stationary ratchet together
springs
34
2 conditions to initiate pitchlock
overspeed of 103.5% | loss of oil
35
pitchlock reset conditions
throttle below 28 * co ord | blade above 10*
36
purpose of the low pitch stop assy
prevents blades reducing pitch into the ground range <13* while the throttle is in the flight range 34-90* co ord
37
angle at which lowpitch stop hits the blades
13* degrees