DQ25

Question 1

Draw diagrams comparing the airflow and vortex patterns for IGE vs. OGE hover

Answer 1

…

Question 2

Explain why hovering OGE requires more power than hovering IGE

Answer 2

Vortex generation is restricted in ground effect. This makes the outer parts of the blade more efficient in ground effect.

Question 3

Define translating tendency

Answer 3

The tendency of a helicopter to drift to the side. A helicopter with a single rotor that spins counterclockwise will drift to the right due to tail rotor thrust.

Question 4

To compensate for translating tendency the helicopter design usually includes one or more of the following:
A:
B:
C:
D:

Answer 4

A: Flight controls may be rigged so when it is centered, the disc will be slightly to the left.

B: The mast may be tilted slightly to the left

C: Collective pitch control may also tilt the rotor disc slightly to the left

D: Systems may compensate digitally

Question 5

CAUTION INDICATION - ENG CHIP (System 1 or 2)

ON GROUND
1. Affected engine - ________
2. Single engine emergency shutdown - __________
IN FLIGHT
1. OEI flight condition - ___________
2. Affected engine - ____________
1. Alternative:
3. Single engine emergency shutdown - _________
2. Alternative:
3. Twist grip (affected engine) - ______________

CAUTION THE…..

4. LAND AS SOON AS ______________

Answer 5

CAUTION INDICATION - ENG CHIP (System 1 or 2)

ON GROUND
1. Affected engine - Identify
2. Single engine emergency shutdown - Perform
IN FLIGHT
1. OEI flight condition - Establish
2. Affected engine - Identify
1. Alternative:
3. Single engine emergency shutdown - Perform
2. Alternative:
3. Twist grip (affected engine) - Rotate slowly to idle , check indications

CAUTION THE…..

4. LAND AS SOON AS PRACTICABLE