Flight Controls and hydraulic system

Question 1

Left pedal

Answer 1

Increase tail rotor thrust

Question 2

Pilot cyclic stick

Answer 2

Permanent mount

Cyclic control inputs are considered independent up to the intermixing bell rank.

Question 3

T/R is unique because…..

Answer 3

Only flight control without hydraulics

Question 4

1/2 to 1 pound pre-load is installed on what side?

Answer 4

Copilot

Question 5

Force trim is only on what configuration?

Answer 5

IFR

Question 6

Cyclic control inputs (fore/aft and lateral) are considered independent up to the ___________ __________ from there on up to the non-rotating swashplate they are considered ___________.

Answer 6

Intermixing bellcrank, coordinated

Question 7

What switches are on the collective control head

Answer 7

Search light switches, landing light, governor RPM increase/decrease, starter button

Question 8

Hydraulic system

Answer 8

Hydraulic pump and regulator assembly

Constant pressure at operating rpm 600 +/- 25 psi with 1.9 GPM delivery rate.

Question 9

Hydraulic pressure filter red button pops at what psid?

Answer 9

70

Question 10

Differential relief valve

Answer 10

Relieves pressure build up which could occur from excessive rotor loads.

Question 11

Sequence valve

Answer 11

Prevents the irreversibility of hydraulic fluid in the event of hydraulic pressure loss.

Question 12

Why is the hydraulic solenoid valve said to be a fail-safe switch in the event of an electric failure?

Answer 12

The solenoid valve is spring loaded open thus requiring electrical power to stop hydraulics.

Question 13

Where is the collective friction knob located?

Answer 13

Located at the base and left of the pilot’s collective stick.

Question 14

An upward movement of the collective control increases the pitch angle in each main rotor blade thereby increasing the _____________ of the main rotor disc.

Answer 14

Lift/thrust

Question 15

If the red pop-up button on the hydraulic filter is found to be popped during preflight, the prescribed action would be to contact maintenance and to do what?

Answer 15

Manually reset button,run aircraft to operating rpm and check to see if button popped again.

Question 16

The _____________ control(s) will provide directional control (heading) of the aircraft during hovering operations, as well as trimming the fuselage of the helicopter at higher speeds.

Answer 16

Tail rotor

Question 17

What amount of collective control preload is built into the collective flight control system?

Answer 17

A 3 to 5 pound preload

Question 18

What is the preload on the tail rotor system?

Answer 18

The preload is 4 to 5 pounds.

Question 19

In a conventional helicopter, what flight control directs the total lift/thrust of the main rotor system?

Answer 19

The cyclic

Question 20

Due to aircraft vibration or a hydraulic system pressure surge you may have?

Answer 20

The red button on the hydraulic filter may “pop up”

Question 21

What switches are located on the co-pilot’s collective control head?

Answer 21

There is no co-pilot’s collective control head.

Question 22

In a conventional helicopter flight control system, the cyclic is used to _____________.

Answer 22

Direct the total lift/thrust component in flight.

Question 23

Which flight control provides directional control (heading) at a hover?

Answer 23

Anti-torque pedal

Question 24

Where is the cyclic knob located?

Answer 24

Below and left of the base of the pilot’s cyclic base.