Army Aviation Maneuvers Quiz

1. How can a lighted heliport be identified?

Red, blue, and black perimeter lights

No lights with posted signage

Rotating purple lights

Green, yellow, and white beacon lights

Lighted heliports are identified by beacons flashing green, yellow, and white. These colors distinguish heliports from airports and other ground lighting, ensuring safe identification during night or low-visibility operations.

Explanation

Lighted heliports are identified by beacons flashing green, yellow, and white. These colors distinguish heliports from airports and other ground lighting, ensuring safe identification during night or low-visibility operations.

2. What is the primary purpose of the tail rotor system?

Provide additional lift

Control pitch

Counteract main rotor torque

Stabilize altitude

The tail rotor counteracts the torque produced by the main rotor. Without this anti-torque force, the helicopter fuselage would rotate in the opposite direction of the main rotor.

Explanation

The tail rotor counteracts the torque produced by the main rotor. Without this anti-torque force, the helicopter fuselage would rotate in the opposite direction of the main rotor.

3. What is the sideways drift during hover caused by tail rotor thrust called?

Vertical drag

Translating tendency

Lateral shift

Yaw displacement

Translating tendency is the lateral drift caused by tail rotor thrust during hover. Pilots counteract this using cyclic input to maintain a stationary hover.

Explanation

Translating tendency is the lateral drift caused by tail rotor thrust during hover. Pilots counteract this using cyclic input to maintain a stationary hover.

4. What is the upward bending of rotor blades due to lift and centrifugal force called?

Tilting

Flexing

Coning

Curving

Coning occurs when lift and centrifugal force cause rotor blades to angle upward. This effect increases with rotor speed and lift production.

Explanation

Coning occurs when lift and centrifugal force cause rotor blades to angle upward. This effect increases with rotor speed and lift production.

5. Where is the helicopter center of gravity range usually located?

Above the tail rotor

At the aircraft bottom

Near the cockpit window

Near the main rotor mast

The center of gravity range is located near the main rotor mast to allow balanced control and stable flight characteristics.

Explanation

The center of gravity range is located near the main rotor mast to allow balanced control and stable flight characteristics.

6. What is the unequal lift between advancing and retreating blades called?

Imbalance

Disparity

Asymmetry of lift

Dissymmetry of lift

Dissymmetry of lift results from different airspeeds over advancing and retreating blades. Helicopters compensate using blade flapping and cyclic pitch changes.

Explanation

Dissymmetry of lift results from different airspeeds over advancing and retreating blades. Helicopters compensate using blade flapping and cyclic pitch changes.

7. When is ground resonance most likely to occur?

During strong crosswinds

After uneven landing gear contact

With low fuel

When autopilot is engaged

Ground resonance occurs when uneven landing gear contact creates rotor imbalance, leading to violent fuselage oscillations if not corrected immediately.

Explanation

Ground resonance occurs when uneven landing gear contact creates rotor imbalance, leading to violent fuselage oscillations if not corrected immediately.

8. How is a quick stop initiated in a helicopter?

Increase collective and forward cyclic

Apply aft cyclic and increase collective

Lower collective and apply aft cyclic

Apply left cyclic and increase collective

A quick stop is initiated by applying aft cyclic to reduce forward speed and lowering collective to prevent climbing.

Explanation

A quick stop is initiated by applying aft cyclic to reduce forward speed and lowering collective to prevent climbing.

9. How is takeoff from a slope with skid gear normally accomplished?

Maximum collective immediately

No attitude adjustment

Level the helicopter before liftoff

Turn tail upslope

For slope takeoff, pilots level the rotor disc before liftoff to prevent rollover or tail rotor strike.

Explanation

For slope takeoff, pilots level the rotor disc before liftoff to prevent rollover or tail rotor strike.

10. What is the correct procedure for a slope landing?

Lower downslope skid first

Land parallel to slope

Apply full collective

Lower upslope skid first

During slope landings, the upslope skid contacts first to stabilize the helicopter before lowering the downslope skid.

Explanation

During slope landings, the upslope skid contacts first to stabilize the helicopter before lowering the downslope skid.

11. What are standard sea-level conditions for density altitude calculations?

30.00 in Hg and 75°F

29.92 in Hg and 59°F

10.00 in Hg and 32°F

25.00 in Hg and 50°F

Standard sea-level conditions are 29.92 inches of mercury and 59°F. These values are used as a baseline for density altitude calculations.

Explanation

Standard sea-level conditions are 29.92 inches of mercury and 59°F. These values are used as a baseline for density altitude calculations.

12. When should a running takeoff be used?

For practice

For fuel efficiency

When hover is not possible

To reduce noise

Running takeoffs are used when weight or density altitude prevents hovering. Forward motion increases lift efficiency.

Explanation

Running takeoffs are used when weight or density altitude prevents hovering. Forward motion increases lift efficiency.

13. What is the purpose of foot pedals in a helicopter?

Adjust radio volume

Change altitude

Control flaps

Control tail rotor thrust

Foot pedals adjust tail rotor thrust to control yaw and counteract torque changes during power adjustments.

Explanation

Foot pedals adjust tail rotor thrust to control yaw and counteract torque changes during power adjustments.

14. During forward flight, where is the advancing blade located?

Left half of disc

Upper half of disc

Lower half of disc

Right half of disc

In counterclockwise rotor systems, the advancing blade is on the right side during forward flight.

Explanation

In counterclockwise rotor systems, the advancing blade is on the right side during forward flight.

15. Which control changes pitch of all main rotor blades equally?

Cyclic control

Throttle

Anti-torque pedals

Collective pitch control

The collective pitch control changes blade pitch equally, increasing or decreasing total lift.

Explanation

The collective pitch control changes blade pitch equally, increasing or decreasing total lift.

16. Which conditions reduce helicopter performance the most?

Low altitude and low temperature

High altitude and high temperature

Low altitude and high moisture

High altitude and low temperature

High altitude and high temperature increase density altitude, reducing engine power, rotor efficiency, and lift.

Explanation

High altitude and high temperature increase density altitude, reducing engine power, rotor efficiency, and lift.

17. During surface taxiing, pedals maintain heading and cyclic maintains

Altitude

Pitch

Ground track

Airspeed

During taxiing, pedals maintain heading while cyclic controls ground track direction.

Explanation

During taxiing, pedals maintain heading while cyclic controls ground track direction.

18. At 5,000 feet, an indicated airspeed of 80 mph equals approximately

82 mph

88 mph

90 mph

95 mph

True airspeed increases with altitude. At 5,000 feet, 80 mph indicated airspeed equals approximately 88 mph true airspeed using the 2% per 1,000 feet rule.

Explanation

True airspeed increases with altitude. At 5,000 feet, 80 mph indicated airspeed equals approximately 88 mph true airspeed using the 2% per 1,000 feet rule.