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Questions and Answers
Which force attracts a body toward its axis of rotation?
Which force attracts a body toward its axis of rotation?
- Centrifugal Force
- VNE
- Weight
- Centripetal Force (correct)
What is VNE?
What is VNE?
- The apparent force that an object moving along a circular path exerts on the body
- The force opposite centrifugal force
- The force that attracts a body toward its axis of rotation
- The speed beyond which an aircraft should never be operated (correct)
What is the direction of the centrifugal force?
What is the direction of the centrifugal force?
- Outward away from the center of rotation (correct)
- Upwards
- No direction
- Inward towards the center of rotation
Which factor can affect the value of VNE?
Which factor can affect the value of VNE?
What is the definition of centrifugal force?
What is the definition of centrifugal force?
What is the direction of the centripetal force?
What is the direction of the centripetal force?
What is the definition of VNE?
What is the definition of VNE?
Which force acts opposite to the centrifugal force?
Which force acts opposite to the centrifugal force?
Which term refers to the movement of the rotor blades during rotation?
Which term refers to the movement of the rotor blades during rotation?
What is the imaginary circular plane outlined by the rotor blade tips called?
What is the imaginary circular plane outlined by the rotor blade tips called?
What is the term used for the tendency of a helicopter to turn in the opposite direction of the main rotor rotation?
What is the term used for the tendency of a helicopter to turn in the opposite direction of the main rotor rotation?
Which term refers to the fore and aft movement of the rotor blade in the plane of rotation?
Which term refers to the fore and aft movement of the rotor blade in the plane of rotation?
What is the movement of a helicopter about its lateral axis called?
What is the movement of a helicopter about its lateral axis called?
What is the movement of a helicopter about its longitudinal axis called?
What is the movement of a helicopter about its longitudinal axis called?
What is the condition when an aircraft is in straight and level, unaccelerated flight called?
What is the condition when an aircraft is in straight and level, unaccelerated flight called?
What does L/Dmax represent?
What does L/Dmax represent?
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Study Notes
Forces in Helicopter Rotation
- Centrifugal force attracts a body away from its axis of rotation.
- Centripetal force attracts a body toward its axis of rotation.
- Centripetal force acts opposite to the centrifugal force.
Helicopter Rotation Terminology
- VNE (Never Exceed speed) is the maximum speed at which a helicopter should be operated.
- The direction of the centrifugal force is away from the axis of rotation.
- The direction of the centripetal force is toward the axis of rotation.
- Factors affecting the value of VNE include air density, weight, and other environmental conditions.
Rotor Blade Movement
- The imaginary circular plane outlined by the rotor blade tips is called the rotor disk.
- The term "coning" refers to the movement of the rotor blades during rotation.
- The fore and aft movement of the rotor blade in the plane of rotation is called "flapping".
- The tendency of a helicopter to turn in the opposite direction of the main rotor rotation is called "torque".
Aircraft Movement
- The movement of a helicopter about its lateral axis is called "roll".
- The movement of a helicopter about its longitudinal axis is called "pitch".
- Straight and level, unaccelerated flight is called "trim".
- L/Dmax represents the maximum lift-to-drag ratio, which is a measure of an aircraft's efficiency.
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