Assignment 7
Reduction Gears and Related Equipment (Cont'd); Engine Performance and Efficiency
Textbook Assignment: Engineman 1&C, NAVEDTRA 10543-E1, Pages 4-12 through 5-10
Learning Objective:
Recognize the
components of the controllable pitch
propellers and their operating
principles.
7-1.
In a CRP system, which of the following
component(s) form(s) the chamber for the
servomotor piston?
1.
Hub cone and end cover
2.
Hub cone and hub body
3.
Head tank
4.
Tailshaft
Question 7-2 is to be judged True or
False.
7-2.
The hub is secured to the tailshaft by
flange bolts which are designed to
take torque from the tailshaft.
7-3.
To which of the following components are
the propeller blades attached?
1.
Hub body
2.
Bearing ring
3.
Crank pin ring
4.
Guide pin dowels
7-4.
Where is the valve rod assembly located?
1.
In the hub
2.
In the servomotor
3.
In the shaft alley
4.
Within the propeller shaft
7-5.
From which of the following sources is the
hydraulic oil supplied to the hydraulic
oil pumps?
1.
Engine sump
2.
Reduction gear
3.
Separate sump
4.
Hub oil tank
In answering questions 7-6 through 7-10,
select from column B the component of the CRP
propeller system that is being described in
column A.
7-6.
7-7.
7-8.
7-9.
A. Description
Provides a direct
hydraulic oil con-
nection to the
main propulsion
shaft
Contains the major
components of the
hydraulic system
Provides a mechanical
link between the OD
box and the hub
servomotor
Mounted at the forward
end of main reduction
gear housing and driven
through a disconnect
coupling.
7-10. Translates to the valve
rod in response to
control oil commands
B. Component
1.
OD box
2.
Standby
PumP
3.
Valve
rod
assembly
4.
Hydraulic
oil power
module
Question 7-11 is to be judged True or
False.
7-11. The primary function of the standby pump
is to serve as a backup pump in case of
main pump failure.
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