Rotorcraft Fundamentals

A reduction in anti-torque thrust will cause the

tail to pivot in the direction of torque rotation around the main rotor axis

If a single-rotor helicopter is in forward horizontal flight, the angle of attack of the advancing blade is

less than the retreating blade

Which statement is correct concerning torque effect on helicopters?

Torque direction is the opposite of rotor blade rotation

Movement about the longitudinal axis (roll) in a helicopter is effected by movement of the

cyclic pitch control

Movement about the lateral axis (pitch) in a helicopter is effected by movement of the

cyclic pitch control

Wing dihedral, a rigging consideration on most airplanes of conventional design, contributes most to stability of the airplane about its

longitudinal axis

The auxiliary (tail) rotor of a helicopter permits the pilot to compensate for and/or accomplish which of the following?

Torque and directional control

The vertical flight of a helicopter is controlled by

collective pitch changes

A helicopter in forward flight, cruise configuration, changes direction by

tilting the main rotor disc in the desired direction

In a hovering helicopter equipped with a tail rotor, directional control is maintained by

varying the pitch of the tail rotor blades

Other than the manufacturer maintenance manual what other document could be used to determine the primary flight control surface deflection for an imported aircraft that is reassembled after shipment?

Aircraft Type Certificate Data Sheet

One purpose of the freewheeling unit required between the engine and the helicopter transmission is to

automatically disengage the rotor from the engine in case of an engine failure

What is the purpose of the free-wheeling unit in a helicopter drive system?

It disengages the engine from the main rotor when engine RPM is less than rotor RPM

In rotorcraft external-loading, the ideal location of the cargo release is where the line of action passes

through the center of gravity at all times

The purpose in checking main rotor blade tracking is to determine the

relative position of the blades during rotation

Main rotor blades that do not cone by the same amount during rotation are said to be out of

Track