Controls & Their Effects

Question 1

When the pitch horn is attached to the trailing edge of the blade, raising of collective will cause the swash-plate to (rise / fall) so that the blade angle (increases / decreases).

Answer 1

• Fall.
• Increase.

Question 2

Using collective (will / will not) affect the amount of total rotor thrust and it (will / will not) change the orientation of the total rotor thrust.

Answer 2

• Will.
• Will Not.

Question 3

Moving the cyclic control (will / will not) raise or lower the swash-plate but it will ___________ the swash-plate so that (all the blade together / individual blades) obtain changes to their (blade angle / angle of attack).

Answer 3

• Tilt.
• Individual blades.
• Blade Angle.

Question 4

Cyclic and Collective controls activate the __________________ plate (or star) of the swash-plate and control inputs are transferred to the blades via the __________________ plate.

Answer 4

• Stationary.
• Rotating.

Question 5

The function of a correlator unit is to (increase / decrease) engine power as collective is raised. As altitude is gained the correlator unit becomes (more / less) effective.

Answer 5

• Increase.
• Less.

Question 6

When a blade flaps up, it’s centre of gravity moves (in towards / out from) the axis of rotation and as the blade (increases / decreases) its speed it will move (forward / rearward) on its lead-lag hinge. This course is because of _________________ effect.

Answer 6

• In Towards.
• Increases.
• Forward.
• Coriolis.

Question 7

Periodic drag change occurs in forward flight when (blade angles / blade angles of attack) change because of blade flapping.

Answer 7

• Blade Angle of Attack.