Flight Controls and Hydraulics

Question 1

Cyclic and collective inputs transmit to main rotor by:

Answer 1

Ball bearing control cable (FLEXBALL) to the hydraulic boost unit to mixing lever assembly

Question 2

Tilt compensation spring in collective increases control force in ___ direction.

Answer 2

collective down

Question 3

The ___ ___ ___ in the cyclic control system tranmits the 3 amplified main rotor control signals to the swashplate.

Answer 3

Mixing lever assembly

Question 4

6 components of the trim system:

Answer 4

1. 2 trim actuators
2. trim linkage
3. control box
4. BEEP TRIM switches
5. PUSH BUTTONS (on cyclic stick)
6. FTR switch

Question 5

What happens if trim actuator jams?

Answer 5

pin shears

Question 6

Where is yaw brake?

Answer 6

mounted to bottom of intermediate gearbox

Question 7

What hydraulic system powers tail rotor?

Answer 7

2

Question 8

Minimum level hydro fluid on reservoirs?

Answer 8

sight glass half full

Question 9

hydraulic pump description:

Answer 9

constant pressure, variable delivery high pressure pump

Question 10

each hydraulic actuator has a ___ ___ in the event a control spool jams.

Answer 10

shear pin

Question 11

2 Yaw SAS functions:

Answer 11

1. enhance dynamic stability

2. dampent gust effects on yaw axis

Question 12

3 main components of YAW SAS:

Answer 12

1. power supply
2. FOG (fibre optic gyro)
3. yaw actuator

Question 13

Are hydraulic system test authorized in flight?

Answer 13

NO