13 - Flying Controls

Question 1

List the main components of the Main Rotor flying controls:

Answer 1

• Cyclic & Collective
• Rods (white rods not to be adjusted; black rods adjustable)
• Cranks / Levers
• ‘Flexball’ cables
• Main Servo controls.

Question 2

List the main components of the Tail Rotor flying controls:

Answer 2

• Pedals
• Rods (white rods not to be adjusted; black rods adjustable)
• Cranks / Levers
• ‘Flexball’ cables
• Tail Servo control.

Question 3

What actuators are included in the flying controls?

Answer 3

• SEMAs (Series Electro-mechanical Actuator) - P/R/Y x 2 each; Coll. X 1
• Trim Actuator (parallel) - P/R/Y/C x 1 each

Question 4

What control authority do the actuators have?

Answer 4

• SEMAs (act in series with controls - fast response, small authority):
  - Pitch: 10% each, 20% total
  - Roll: 8% each, 16% total
  - Yaw: 10% each, 20% total
  - Collective: 16%
• Trim (act in parallel with controls - slow response, full authority):
  - All axes: 100% authority.

Question 5

Describe overview of flying controls from cockpit to output:

Answer 5

• Cyclic, Collective, Pedal inputs
• Control rods routed to outboard and back of cockpit (C/P LHS; R/Y RHS)
  - Flexball cables for Yaw and Roll
  (- 1 other Flexball cable on aircraft, for Rotor Brake!)
• P/R/C routed up the side then inboard to Mixing Unit (above/behind pilots’ heads)
• P/R/C then routed to 3 x Main Servo Controls on main rotor (LH front and rear, RH front)
• Y routed directly, through tail boom, to Tail Servo Control.