Design And Components

Question 1

The principal function of the main rotor gearbox is to transfer power from the —— to the main rotor and to provide —— gearing to ensure main rotor rpm is (less, more) than engine rpm.

Answer 1

Engine
Reducing
Less

Question 2

When engine rpm becomes less than rotor rpm, the —— unit (engages, disengages) the engine from the rotor.

Answer 2

Freewheeling, sprag clutch
Disengages

Question 3

When a chip detector light comes on in flight it indicates a (serious, non serious) situation and urgent investigation is (essential, non essential)

Answer 3

Serious
Essential

Question 4

Phase lag means the transfer of cyclic input —— degrees ( in the direction of, at right angles to) direction of rotation.

Answer 4

90
In the direction of

Question 5

If there is a 90 degree angle between the blade feathering axis and the pitch link attachment point on the swash plate, forward cyclic will cause the swash plate to tilt (in the same direction as, 90 degrees to) the tilt of the main rotor.

Answer 5

Same direction as

Question 6

Many tail rotor are fitted with a delta 3 hinge which (increases, decreases) flapping amplitude because as the blade flaps, it also (lead-lags, or feathers)

Answer 6

Reduces
Feathers

Question 7

You note the rotor rpm is low and manifold pressure is high. To correct this situation you should( roll on throttle, lower collective)

Answer 7

Lower collective

Question 8

The principal means of providing engine cooling of helicopter engines is through (airspeed, engine driven fan)

Answer 8

Engine driven fan

Question 9

An underslung rotor system ( restricts, encourages) movement of blade centre of gravity from the ( mast axis, axis of rotation) during flapping.

Answer 9

Restricts
Axis of rotation