Rotorcraft Jeppesen || with Complete Solutions.
The rotor of an autogiro is turned by correct answers Autorotational forces
Torque of the main rotor is compensated on a single rotor helicopter by the use of a correct
answers Vertical tail rotor
Two ways of counteracting torque from a dual-rotor helicopter system are correct answers
For & aft counter-rotating rotors. Co-axial counter-rotating rotors.
Rigid rotor systems have movement only about their correct answers Feather axis
The four forces acting on a helicopter rotor are: correct answers A. Gravity
B. Centrifugal Force
C. Lift
D. Drag
Most helicopters use a __________ airfoil section. correct answers Symmetrical
What are the two gyroscopic forces that act on the spinning rotor of a helicopter? correct
answers A. Rigidity in space
B. Precession
_______ causes the rotor to tilt 90 degrees away from the point the control force is applied.
correct answers Precession
_________ causes a rotor blade to attempt to speed up as it flaps up and moves its center of
mass closer to the rotor mast. correct answers Coriolis effect
Coriolis effect is minimized on semi-rigid rotor by using an ________ hub correct answers
Underslung
Ground effect is normally considered to extend upward from the surface about ______ of a
rotor span. correct answers Less than one diameter
What is meant by the abbreviation OGE? correct answers Out of ground effect
What is it meant by the abbreviation IGE? correct answers In ground effect
The helicopter blade that moves in the same direction that the helicopter is moving is called
the ________ blade. correct answers Advancing
A helicopter experiences dissymetry of lift during ________ flight. correct answers Forward
Dissymetry of lift is compensated for by blade ________ and ________ correct answers Flap,
Feather
A helicopter rotor normally stalls on the _______ blade. correct answers Retreating
A helicopter rotor stalls in _______ speed flight correct answers High
The rotor of an autogiro is turned by correct answers Autorotational forces
Torque of the main rotor is compensated on a single rotor helicopter by the use of a correct
answers Vertical tail rotor
Two ways of counteracting torque from a dual-rotor helicopter system are correct answers
For & aft counter-rotating rotors. Co-axial counter-rotating rotors.
Rigid rotor systems have movement only about their correct answers Feather axis
The four forces acting on a helicopter rotor are: correct answers A. Gravity
B. Centrifugal Force
C. Lift
D. Drag
Most helicopters use a __________ airfoil section. correct answers Symmetrical
What are the two gyroscopic forces that act on the spinning rotor of a helicopter? correct
answers A. Rigidity in space
B. Precession
_______ causes the rotor to tilt 90 degrees away from the point the control force is applied.
correct answers Precession
_________ causes a rotor blade to attempt to speed up as it flaps up and moves its center of
mass closer to the rotor mast. correct answers Coriolis effect
Coriolis effect is minimized on semi-rigid rotor by using an ________ hub correct answers
Underslung
Ground effect is normally considered to extend upward from the surface about ______ of a
rotor span. correct answers Less than one diameter
What is meant by the abbreviation OGE? correct answers Out of ground effect
What is it meant by the abbreviation IGE? correct answers In ground effect
The helicopter blade that moves in the same direction that the helicopter is moving is called
the ________ blade. correct answers Advancing
A helicopter experiences dissymetry of lift during ________ flight. correct answers Forward
Dissymetry of lift is compensated for by blade ________ and ________ correct answers Flap,
Feather
A helicopter rotor normally stalls on the _______ blade. correct answers Retreating
A helicopter rotor stalls in _______ speed flight correct answers High
