TD 25

Question 1

Explain why hovering OGE requires more power than IGE?

Answer 1

Increased pitch angle creates more drag.

Question 2

Define translating tendency

Answer 2

Tendency to drift right laterally due to tail rotor thrust exerted to compensate for main rotor torque.

Question 3

To compensate for translating tendency, helicopter design includes one or more of the following:

Answer 3

a. Flight control rigging tilts disk slightly left when cyclic is centered.

b. Transmission mounted so mast is tilted left while fuselage is laterally level.

c. Collective pitch control system designed so rotor disk tilts left.

Question 4

Caution indication - ENG CHIP (System 1 or 2)

ON GROUND

1. Affected Engine -
2. Single Engine Emerg. Shutdown -

• IN FLIGHT -

1. OEI Flight Condition -
2. Affected Engine -

• ALTERNATIVE -
  1. Single engine Emerg. Shutdown -
  2. Twist grip (affected engine) -
  2. Land as soon as ___________

Answer 4

ON GROUND
1. Identify
2. Perform

• IN FLIGHT -
  1. Establish
  2. Identify
• ALTERNATIVE -
  1. Perform
  2. Rotate slowly to idle, check indications
  3. Practicable