Helicopter 2

How do you dynamically balance a tail rotor? a) Torque wrench and chalk marks b) Chadwick, Strobex, or Vibrex equipment c) Adjusting coning angle manually Respuesta: b. Torque wrench and chalk marks. Chadwick, Strobex, or Vibrex equipment. Adjusting coning angle manually.

What is blade sweeping used for?. Vertical vibration correction. Chordwise balance. Increasing lift.

When is blade sweeping done?. After chordwise balance. Before chordwise balance. During engine shutdown.

What step follows blade alignment?. Tracking. Balancing. Coning adjustment.

What controls vertical flight?. Cyclic. Collective. Pedals.

What controls pitch variations through rotation?. Throttle. Collective. Cyclic.

What controls helicopter direction in forward flight?. Tail rotor pitch. Tilting main rotor disk (cyclic). Pedal trim actuator.

What changes main rotor pitch?. Swashplate movement. Stabilizer bar. Hydraulic pump.

Counterweights on flight controls are used for: Reduce flutter and ease pilot workload. Improve transmission lubrication. Cool the rotor hub.

What prevents collective from interfering with cyclic?. Hydraulic accumulator. Stabilizer bar. Mixer box.

What must be rigged before throttle rigging?. Pedals. Collective. Cyclic.

If mast/transmission lean too far aft, what occurs?. Loss of forward cyclic. Excessive mast bumping. Tail rotor stalls.

Direction of airflow in autorotation?. Downward. Upward. Forward.

Tail rotor position during autorotation (American helicopters)?. Positive pitch. Flat pitch. Negative pitch.

What happens if freewheeling unit seizes?. Rotor stops immediately. Rotor drives the engine. Tail rotor disconnects.

How is tail rotor dynamic balance adjusted?. Changing pitch links. Adding or removing weights. Changing RPM.

What is used to compensate tail rotor dissymmetry in forward flight?. Pylon tilt. Delta hinge + vertical fin. Hydraulic boost.

European helicopter takeoff requires: Right pedal. Left pedal. No pedal input.