TD 27

Question 1

What is Transverse Flow Effect?

Answer 1

In forward flight, air passing through the rear portion of the rotor disk has a greater downwash angle than air passing through the forward portion.

Reduced AOA on the rear of the rotor disk equals less lift.

Increased AOA on the front of the rotor disk equals more lift.

Due to Gyroscopic precession the helicopter will tend to turn right.

Question 2

Rotor RPM Limitations

Answer 2

See tabel

Question 3

WARNING LIGHT INDICATIONS – ROTOR RPM

NRO low
– NRO ______ or less – ____________
– Audio signal – ____________

NRO high
– NRO ______ or above – ___________
– Audio signal at _______ or above – ____________

PROCEDURE

NRO low/NRO high

1. Rotor RPM indicator – Check
2. Collective lever – _____________

Answer 3

95%

steady light

low pitch beeping tone

106%

flashing light and warning gong

110%

flashing light and steady high pitch tone

Adjust as necessary to maintain NRO within normal range

Question 4

Tail rotor drive failure – hover

Procedure – HOVER IN GROUND EFFECT
1. Both Twist grips – \_\_\_\_\_\_\_\_\_\_\_
and simultaneously
2. Landing attitude – \_\_\_\_\_\_\_\_\_\_\_
3. Collective lever – \_\_\_\_\_\_\_\_\_\_\_
After landing:
4. Double engine emergency shutdown – \_\_\_\_\_\_\_\_\_\_\_

Answer 4

Rotate to IDLE

Establish

Apply as necessary

Perform