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Provides a means of rapidly decelerating the rotor after engine shutdown for personnel and aircraft safety.

5.1.9.1.

Differentiate between the TH-57 hydraulic system and the rotor break hydraulic system.

Totally independent of each other.  Rotor brake uses a hand operated master cylinder (100-120 psi).

5.1.9.2.

State type and location of the gauge associated with the TH-57C rotor break.

Direct reading gauge located overhead between the pilots.

5.2.

State the function of tail rotor system.

To compensate for the torque effect of the main rotor and to allow control of the helo about he yaw axis.

5.2.1.

Describe the tail rotor system.

2 stainless steel blades, semi-rigid, flapping type system (5’-5” in Dia)

5.2.2.

Identify the major components of the tail rotor system.

1.

Stainless Steel Rotor Blades

2.

Pitch Change Horns

3.

Cross Head

4.

Control Tube

5.

Balance Wheel

6.

Static Stop

7.

Yoke Assembly

5.2.2.1.

Describe the construction of the tail rotor blades.

Aluminum honeycomb covered by stainless steel skin.  Stainless steel doublers added at the foot for added strength.  Stainless steel leading edge abrasion strips.  Root end has an aluminum alloy retention block which houses two spherical bearings to mount the blade to the yoke.

5.2.3.

State the purpose of the blade doublers.

Added Strength

5.2.4.

State the purpose of the balance wheel.

Weights are added to the holes in the wheel to Dynamically Balance the tail rotor.

5.2.5.

Identify the component which limits tail rotor flapping.

Static Stop mounted to the gearbox output shaft

5.3.

Identify the type of flight control systems used on the TH-57.

Conventional type mechanical flight control system

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