Airframe

Which statement is correct concerning torque effect on helicopters?. Torque direction is the same as rotor blade rotation. As horsepower decreases, torque increases. Torque direction is the opposite of rotor blade rotation.

The purpose in checking main rotor blade tracking is to determine the. relative position of the blades during rotation. flight path of the blades during rotation. extent of an out of balance condition during rotation.

If a single-rotor helicopter is in forward horizontal flight, the angle of attack of the advancing blade is. more than the retreating blade. equal to the retreating blade. less than the retreating blade.

A reduction in anti-torque thrust will cause the. tail to pivot in the opposite direction of torque rotation around the main rotor axis. tail to pivot in the direction of torque rotation around the main rotor axis. anti-torque system to become more efficient in the hover mode.

Main rotor blades that do not cone by the same amount during rotation are said to be out of. balance. collective pitch. track.

Movement about the longitudinal axis (roll) in a helicopter is effected by movement of the. collective pitch control. cyclic pitch control. tail rotor pitch control.

In rotorcraft external-loading, the ideal location of the cargo release is where the line of action passes. aft of the center of gravity at all times. forward of the center of gravity at all times. through the center of gravity at all times.

Wing dihedral, a rigging consideration on most airplanes of conventional design, contributes most to stability of the airplane about its. longitudinal axis. vertical axis. lateral axis.

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. It allows the engines to be started without any load from the transmission. It allows the rotors to turn slowly as the engine RPM increases.

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. disconnect the rotor from the engine to relieve the starter load. permit practice of autorotation landings.

A helicopter in forward flight, cruise configuration, changes direction by. varying the pitch of the main rotor blades. changing rotor RPM. tilting the main rotor disk in the desired direction.

The vertical flight of a helicopter is controlled by. collective pitch changes. cyclic pitch changes. increasing or decreasing the RPM of the main rotor.

Movement about the lateral axis (pitch) in a helicopter is effected by movement of the. collective pitch control. cyclic pitch control. tail rotor pitch control.

In a hovering helicopter equipped with a tail rotor, directional control is maintained by. changing the tail rotor RPM. tilting the main rotor disk in the desired direction. 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. Import manual for the aircraft. The certificate of airworthiness issued by the importing country.

The auxiliary (tail) rotor of a helicopter permits the pilot to compensate for and/or accomplish which of the following?. Altitude and pitch oscillation. Airspeed and trimmed flight. Torque and directional control.