The Anti-Torque Rotor

Question 1

The rotor thrust required from an anti-torque rotor is (directly / inversely) proportional to power used.

Answer 1

• Directly.

Question 2

A helicopter fitted with the main rotor rotating clock wise from above tends to _________ to the (left / right) when power is applied and to counteract the yaw the tail rotor blade angles must be (increased / decreased) which is achieved by applying sufficient (left / right) pedal.

Answer 2

• Yaw.
• Left.
• Increase.
• Right.

Question 3

Viewed from behind, tail rotor thrust of a helicopter with a counter clockwise rotating main rotor acts to the (left / right) and it dose so by drawing air from the (left / right) and accelerating it to the (left / right).

Answer 3

• Right.
• Right.
• Left.

Question 4

Tail rotor RPM is controlled by the (main rotor / foot pedals).

Answer 4

• Main Rotor.

Question 5

When lowering collective, the (increased / decreased) demand for anti-torque requires (less / more) left pedal.

Answer 5

• Decreased.
• Less.

Question 6

As you commence a left-hand hover turn & you do not lower or raise the collective lever. As the turn progresses, your height will (increase / decrease) because there is a (increased / decreased) requirement for anti-torque.

Answer 6

• Decrease.
• Increased

Question 7

When you hover out of ground effect you require a certain amount of (left / right) pedal to maintain heading. If you then descend into ground effect without changing pedal position, the helicopter will yaw (right / left) as you maintain your new height.

Answer 7

• Left pedal.
• Left.

Question 8

Factors that cause loss of tail rotor effectiveness are aggravated when the wind is (weak / strong), the helicopters gross weight is (high / low) and the airspeed is (high / low).

Answer 8

• Strong.
• High.
• Low.

Question 9

A method to counteract translating tendency (tail rotor drift) automatically is to (tilted / offset) the mast to the (left / right).

Answer 9

• Tilted.
• Left.

Question 10

A tail rotor placed on a vertical pylon assist in (increasing / decreasing) the degree of (tail rotor drift / rolling tendency)

Answer 10

• Decrease.
• Rolling Tendency.

Question 11

Given the same size and similar RPM as an exposed tail rotor, the shrouded (Fenestron) tail rotor is (more / less) effective, is (easier/ more difficult) to install and (does / does not) need freedom to flap.

Answer 11

• More.
• More Difficult.
• Does Not.

Question 12

When a tail rotor drive shaft breaks in cruise flight, the helicopter will __________ to the (left / right) and as speed is reduced it may be necessary to (increase / decrease) power to maintain directional control.

Answer 12

• Yaw.
• Right.
• Decrease.