Project 7 Flashcards
What is the order of removal for the tail rotor assembly from the aircraft?
- Remove bolts securing pitch links to blades
- Cut lock-wire from dust boot and slide back
- loosen knurled nut on control head
- Remove delta hinge bolt & cup washers
- Remove T-head and then slide off tail rotor assembly
In which direction is the machined side of the tail rotor hub installed? Inboard or outboard?
Machined side of the hub is installed inboard towards the tail boom
What is the purpose of the disk packs installed at the fwd and aft ends of each of the two short shafts?
To allow for flexing of the driveshaft as it spins
What is the purpose of the beveled washers installed on the disk pack bolts?
To increase the amount of flexing of the disk packs without increasing the stress caused by the edge of a standard washer
What is the purpose of the thumb pin on the aft short shaft?
Why are they not installed on the fwd short shaft?
The pin is free to spin in order to confirm that the bonded fitting has not separated from the shaft as it will rotate and jam up. (witness pin)
The fwd shaft is riveted not bonded because of the heat of area in the engine compartment.
What is the purpose of the tail rotor control system?
Control the pitch angle of the tail rotor blades in order to control the amount of thrust created by the tail rotor to compensate for main rotor system torque and provide yaw control
What is the sequence of events for rigging the tail rotor control system?
Start at the front and progress onto the control surface.
- Neutralize pedals
- Next the Tee bell-crank and fwd pulley connected to the pedal torque tubes
- Set the cable position on fwd pulley and aft drum assembly and then tension cables
- Ensure drum is in neutral position and set blade angles with pitch links.
Where are the adjustment points for the overall travel of the tail rotor control system?
Travel limits are set with the adjustable stops located on the L/H & R/H sides of the fwd pulley assembly (bottom of the helicopter)
