Rotor Drag

Question 1

When the disc loading is Increased, total rotor thrust must be (increased, decreased) and since this involves (increased, decreased) in angle of attack it follows that here will be a ( deterioration, improvement) in the total rotor thrust/ rotor drag ratio.

Answer 1

Increase
Increase
Deteriorate

Question 2

When the total rotor thrust/rotor drag ratio gets worse, there is a requirement for more =====.

Answer 2

Power

Question 3

When the gross weight of a helicopter decreases there is a requirement for (larger, smaller) pitch angles which produce (larger, smaller) inflow angles and power can be (increased, decreased)

Answer 3

Smaller
Smaller
Decreased

Question 4

When a helicopter descends into ground effect, the induced flow (increased, decreased) which results in a ——- in angle of attack if collective is not raised or lowered. The helicopter will then ( maintain height, climb, descend)

Answer 4

Decrease
Increase
Climb

Question 5

Compared to hovering out of ground effect, the requirement for total rotor thrust is (more, less, the same), blade angles are ( larger, the same, smaller) and power requirement is (more, the same , less)

Answer 5

Same
Smaller
Less

Question 6

When translational lift becomes effective on initial climb out, (angles of attack, blade angles) increase and if collective is neither lowered or raised the rate of climb will initially (increased, decreased)

Answer 6

Angles of attack
Increase