Rotor System Flashcards
What are the seven major subsystems of the main rotor system ?
The seven major subsystems are the Hub and Shaft Extension, Spindle Assembly, Damper, Pitch Control Rod, Swashplate Assembly, Bifilar Assembly and Rotor Blades.
When removing a main rotor blade, position the blade being removed at the _ or the _ o’clock position and engage the gust lock.
When removing a main rotor blade, position the blade being removed at the 3 or the 9 o’clock position and engage the gust lock.
What must be accomplish prior to removal of the rotor hub and shaft extension?
You must level the aircraft to accommodate for the 3 degree forward tilt of the transmission.
The main rotor spindle assembly can be broken down into two major subcomponents. What are they?
The main rotor spindle can be broken down into the spindle and liner assembly, and the elastomeric bearing subcomponents
What components will cause rotor blade chatter?
The uniball, uniball guide, and droop stop support rings.
What transmits an increase or decrease to the tail rotor blades through the four pitch change rods?
The pitch beam is a four-armed crossbeam that transmits an increase or decrease to the tail rotor blades through the four pitch change rods.
What are the attaching points for the control rod to the tail rotor pitch beam and tail rotor blade pitch horn?
Pitch control rod ends are the attaching points for the control rod to the tail rotor pitch beam and tail rotor blade pitch horn.
When inspecting the inboard retention plate, what is checked and with what tool?
When inspecting the inboard retention plate, check the nylon shims one inch in from the edge of each corner using a micrometer for proper thickness.
During the maintenance process of the Tail Rotor, when must a clamp-up check be done?
Any time the outboard retention plate and tail rotor blades have been removed, a clamp-up check must be done during the reinstallation process.
What is the purpose of the Tail Rotor Counter Weight?
There is a counter weight on the tail rotor blade to keep the blade centered if the pitch control rod should fail.
Tail rotor cant?
Approximate lift and weight lifted?
20 deg upward cant
about 2.5%/400 lb lift
Torque Zone 1
1) Zone I attaches the bifilar assembly to the hub, and the hub to the shaft extension.
2) The upper pressure plate seats the upper set of split cones centering the main rotor hub on the shaft extension.
Torrque Zone 2
1) Zone II attaches the shaft extension to the lower pressure plate, and the main rotor shaft.
2) The lower set of split cones centers the shaft extension on the main rotor shaft.
Number of tip cap screws and how many/where missing?
24 total
none in 4,5,6 area
1 per set in 1,2,3,7,8,9,10,11,12
no more than 2 in the blade set {1,2,3=set} {7,8,9,10,11,12=set}
