Autorotaion

Question 1

When a helicopters engine fail, rotor rpm will——- if blade angles are not (increased, reduced) through —— of the collective lever.

Answer 1

Decay
Reduced
Lowering

Question 2

The function of the freewheeling unit is to —— the engine from the rotor so that engine components do not (retard, over speed) the rotor.

Answer 2

Seperate
Retardant

Question 3

When the engine fails, there is, in most helicopters, a tendency for the nose to pitch (up, down) and for the aircraft to roll ( right, left)

Answer 3

Down
Left

Question 4

Rotor rpm is adversely affected by the stalled region of the disc near the blade ( roots, tip) because inflow angles are (small, large) and the total reaction produces a component ( in the direction of, against) rotation.

Answer 4

Root
Large
Against

Question 5

The driven region of the disc near the blade ( tip, roots) have a (good, poor)lift/drag ratio resulting in a total reaction acting ( in the direction of, against) rotation

Answer 5

Tips
Poor
Against

Question 6

The driving region is normally found ( near the hub, in the middle of the blades , near the tips) and the total reaction provides a component (in the direction of, against) rotation.

Answer 6

Middle
Direction of

Question 7

In a vertical autorotation, rate of descent is (low, high) but it (increases, decreases) as forward speed is gained because angles of attack (increase, decrease) up to a given airspeed.

Answer 7

High
Decreases
Increase

Question 8

When a vertical autorotation is changed into forward flight, the three regions of the disc move towards the ——- so that the stalled region becomes smaller on the (retreating, advancing) side.

Answer 8

Retreating
Advancing

Question 9

When you autorotate at the speed for minimum rate of descent and you realise you are under shooting, you should (increase, decrease) the airspeed. And bring the rotor rpm towards the (bottom, top) of the green range in most light helicopters.

Answer 9

Increase
Bottom

Question 10

When changing from autorotation for maximum endurance to one for maximum range,. The airspeed must be ——- and the rate of descent will (increase, decrease)

Answer 10

Increase
Increase

Question 11

Rotor rpm during an autorotation is controlled with the (cyclic, collective) control.

Answer 11

Collective

Question 12

Rotor rpm decay is likely to be severe when the helicopters engine fails while the aircraft is at a (low, high) gross weight, (high, low) altitude and in a (steep, shallow) angle of bank turn.

Answer 12

High
High
Steep

Question 13

The airspeed-height avoid areas expand when the helicopter is at —— gross weight, ——- altitude and when the atmosphere is ( dry, moist)

Answer 13

High
High
Moist