Phabulous Physics
This was the first functional rotorcraft.
What is the Autogyro?
This main rotor system uses a single flapping hinge.
What is a semi-rigid rotor system?
This designation indicates a reciprocating engine used for helicopters.
What is "H"?
This control changes pitch of all rotor blades at once.
What is the collective?
The adjustment responsible for controlling rotor RPM
What is blade pitch?
This device made controlled flight in a rotorcraft possible.
What is the flapping hinge?
This rotor system uses flapping, and tracking hinges for each blade.
What is a fully-articulated rotor system?
The most common type of jet engine used in helicopters.
What is turboshaft?
This changes blade pitch individually, creating differential lift in the rotor disk
What is the cyclic?
This is the fastest side of travel in the rotor disk in forward flight.
What is the advancing side?
The force that causes a helicopter to rotate opposite the direction of rotor rotation.
What is torque?
This unit disconnects the rotor from the engine when engine RPM drops below rotor RPM.
What is a freewheel unit?
The turbine stage that is connected to the compressor section of a turboshaft engine.
What is the gas producer?
The unit that controls tail rotor blade pitch
What are the anti-torque pedals?
This is an event caused by a failure in airframe vibration isolation, where the vibrations from the rotor system resonate with the landing surface.
What is ground resonance?
This term describes the event that happens when an external force is observed 90° from the point it is applied.
What is Gyroscopic Effect?
This system, common to Bell helicopters, adds stability to a rotor system by helping it return to neutral.
What is a stabilizer bar?
The turbine section that provides power to the output shaft of a turbine engine
What is the freewheel turbine?
The two pieces of a standard swashplate
What are stationary and rotating?
High frequency vibrations are associated with this system
What is the tail rotor?
The principle that describes the link between rotational velocity, inertia, and distance from the axis of rotation.
What is the Corialis Effect?
A measurement of blade cone and flap, relative to the rest of the rotor system.
What is blade tracking?
This device alerts the pilot to metal contamination in a helicopter transmission system.
What is a chip detector?
The device(s) used to make small adjustments in blade coning during tracking
What are trim tabs?
This describes the phenomenon that occurs when forward flight in a helicopter begins to move turbulent air away from the rotors.
What is Transitional Lift?