TD 26

Question 1

Dynamic rollover can occur on ____ as well as during ____ or ____ and ____.

Answer 1

level ground, slope, takeoff, landing

Question 2

What are the conditions required for a Dynamic Rollover?

Answer 2

Pivot Point, Rolling Motion, Exceeding the critical angle

Question 3

Human factors considered in the prevention of dynamic rollover include:
1.
2.
3.
4.
5.

Answer 3

1. Inattention
2. Inexperience
3. Failure to take timely action
4. Inappropriate control input
5. Loss of visual reference

Question 4

What are the slope limitations for the following?
Ground sloping down to the left \_\_ max
Ground sloping to the right \_\_ max
Ground sloping nose up \_\_ max
Ground sloping nose down \_\_ max

Answer 4

11 degrees
6 degrees
8 degrees
8 degrees

Question 5

When performing slope operations maintain a heading of +/- ___ degrees, drift +/- __ foot until touchdown and then ___ allowed.

CAUTION 1: The _____ can be easily ____ during takeoff and landing if excessive cyclic movements occur. A thorough ____ must be performed prior to flight which includes crew coordination to ____ mast moment limits.

CAUTION 2: If the successful completion of the landing is in doubt at ___ or it appears that a ___ may be exceeded, ____ the maneuver and return to a hover

Answer 5

5, 1, no drift

mast moment, exceeded, crew briefing, monitor

any time, limit, abort

Question 6

The following notes pertain to slope operations:
Note. Before performing slope operations, it is important to understand ______ characteristics.
Note. Ground oscillations in ____ axis may be encountered. Pressing the ____ switch should damp out these oscillations.
Note. Crewmembers must be aware of the helicopter’s _____ hovering attitude prior to landing.
Note. To improve the ____ control at a hover the ____ function can be switched off IAW the current RFM. In this case _____ only is active. This is known as precision hover mode when airspeed is equal to or less than 40 knots. Feet on operation is required.

Answer 6

dynamic rollover
roll, FTR
normal
YAW, YAW TRIM, YAW SAS

Question 7

Define dissymmetry of lift

Answer 7

the differential (unequal) lift between advancing and retreating halves of the rotor disk caused by the different wind flow velocity across each half.

Question 8

When blade flapping has compensated for dissymmetry of lift, the rotor disk is tilted to the rear, called _____. The maximum upflap occurring over the nose and the maximum downflap occurring over the tail cause blowback. This would cause airspeed to decrease. The aviator uses _____ to compensate for dissymmetry of lift allowing him or her to control the attitude of the rotor disk.

Answer 8

blowback, cyclic feathering