Lifting Systems Flashcards
(24 cards)
The caution “MM EXCEED” will illuminate on the Caution and Advisory Display (CAD) if the mast moment exceeds [a].
77%
If the magnetic oil drain plug installed on the tail rotor transmission detects metal particles, will a chip light will illuminate in the cockpit to notify the pilot?
No
The main gear is driven by the two engines and drives the main rotor, tail rotor, and accessories. The main transmission reduces the input RPM of the two engines to the required output RPM for the [a] [b] and [c].
Main rotor
Tail rotor
Accessories
The [a] [b] system permits stopping of the main rotor as quickly as possible after the engines have been shut down.
Rotor
Brake
To ensure oil circulation in the event of clogging, the oil filter assembly for the main transmission incorporates a [a] with an indicator button.
Bypass
Do not operate the rotor brake until both engines are [a] and the rotor RPM (NR) is below [b]%.
Shutdown
50%
Which system measures and indicates any bending moments occurring on the rotor mast?
[a] [b] [c]
Mast
Moment
Indicator
What actions are required of the pilot if the pop-up indicator pin is found “popped” on preflight?
You must make a [a] and [b].
Write Up
Notify Maintenance
On preflight, the oil level of the main transmission is checked via the [a] [b].
Sight
Glass
The primary purpose of the tail rotor is to [a] the torque effect of the [b] rotor
Counteract
Main
If this caution is displayed on the CAD it means that the [a] oil is contaminated by [b] particles.
Transmission
Metal
When the rotor RPM is below 70%, the mast moment indication is depicted by a [a] scale ; what type of scale?
Linear
Unlike many Army helicopters that have a fully articulated main rotor system, the UH-72 has what type of rotor system?
Rigid Hingeless
On preflight, the oil level of the main transmission is checked via the [a] [b].
Sight
Glass
The operational advantage of having a transmission with a “[a]” type Lubrication System is that the system consists of two identical lubrication circuits; if one circuit fails the other continues to lubricate the entire transmission system.
Redundant
When the rotor RPM is above 70%, the mast moment indication is depicted by a [a] scale ; what type of scale?
Circular
Which component reduces the engine output speed and transmits power from the engines to the main and tail rotor systems?
[a] [b]
Main
Transmission
What component changes the power flow coming from the main transmission to the tail rotor gearbox?
Intermediate Gearbox
Transmission oil pressure and temperature indications are displayed on [a] of the [b].
Lane 2
VEMD
Which of the following design characteristics best describes how blade flap and lead-lag movement are accomplished?
-The hydraulic dampened main rotor hinges.
-The under-slung main rotor hub.
-The elasticity of the blades.
-The rigid rotor system is not designed to perform blade flap and lead-lag movements.
The elasticity of the blades
The lift and propulsion required for flight are generated by the [a] [b] [c].
Main
Rotor
Blades
The [a] [b] prevents a reverse power flow from the main transmission to the engines.
Sprag Clutch
Refer to the graphic below to identify the main components of the UH-72A Lifting System. Match the component picture to its name.
-Main Transmission
-Main Rotor Blades
-Main Rotor Head
-Rotor Brake System
A. Main Rotor Head
B. Main Rotor Blades
C. Main Transmission
D. Rotor Brake System
In forward flight, the Delta hinge system allows for [a].
Flapping
