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18 Cards in this Set
- Front
- Back
What are the 7 main sections of the flight control system? |
Cockpit controls Closet controls First and Second-Stage mixing controls Forward upper controls Tunnel controls Aft fuselage controls Aft upper controls |
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What’s the purpose of the flight control system? |
To transmit control movements from the cockpit to the swashplates. |
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What are the tilt of the FWD & AFT XMSN’s? And why? |
FWD - 9 AFT - 4 To provide a forward propulsive force aid during ground taxiing. |
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What are LCT’s what do they do? |
The Longitudinal Cyclic Trim’s are electrical actuators attached to the swashplates. The LCT system provides programmed cyclic tilt of the rotor discs. |
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As airspeed increases forward tilt increases. Why? |
To minimize fuselage pitch and attitude changes. Reduces blade flapping, stress on the aft vertical shaft, fuselage AOA, allowing for a higher velocity. |
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What are the four control axes of flight? |
Thrust Pitch Roll Yaw |
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What happens when the thrust control is raised? |
The collective pitch angle of all six rotor blades increases, causing the aircraft to ascend. |
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Longitudinal control of the tandem helicopters is accomplished through what? |
Differential Collective Pitch (DCP) (Each rotor system cancels the other systems torque effect) |
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Forward cyclic input ______ thrust (collective pitch) in the forward rotor system and ______ thrust in the aft rotor system an equal amount, causing the aircraft to pitch nose down and increase airspeed. |
Decreases Increases |
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Aft cyclic input ________ the thrust in the forward rotor system and ______ thrust in the aft rotor system causing the aircraft to pitch nose up, decrease airspeed, and move aft. |
Increases Decreases |
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What happens when the cyclic is moved left? |
FWD & AFT swashplates tilt to the left. Helicopter rotates along the center of the fuselage and slides left. |
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What happens when the cyclic is moved left? |
FWD & AFT swashplates tilt to the left. Helicopter rotates along the center of the fuselage and slides left. |
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What happens when the cyclic is moved right? |
FWD & AFT swashplates tilt to the right. Helicopter rotates along the center of the fuselage and slides right. |
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How is YAW directional control accomplished? |
By tilting the rotor systems equally in opposite directions which causes the aircraft to turn about the vertical axis. |
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What does a right pedal input do? |
Tilts the forward swashplate to the right and the aft swashplate to the left. The helicopter rotates around the vertical axis moving nose right - tail left. |
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What does a left pedal input do? |
Tilts the forward swashplate to the left and the aft swashplate to the right. Helicopter rotates around the vertical axis moving nose left - tail right. |
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What control inputs will cause the acft to turn around the fwd rotor system? |
Pedal and cyclic movements in the opposite direction. |
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How is a right turn initiated? |
Apply right pedal and left cyclic. |