Chapter 0 to 1 Flashcards
Which of the following vehicles can be categorized as rotorcraft
A. Helicopter
B. Autogiros
C. Tiltrotor
D. Hot air balloon with fans
E. Propeller aircraft
A,B,C
What are the two main issues driving the multi-rotor configurations widely used in the early
rotorcraft development
Torque balance; Rolling moment in forward flight
How does the single-rotor helicopter deal with the torque balance:
Tail rotor
How does the single-rotor helicopter deal with the rolling moment in forward flight?
flapping motion
What is the difference between the helicopter and autogiros
A. The rotor powered by the engine in the cruise flight
B. Autogiros cannot take off vertically without the help of pre-rotator
C. Hover capability
D. The helicopter may be larger than the autogiros
E. Autogiros sometimes are not equipped with rotor control inputs
Why does not the autogiro need a tail rotor
The rotor of the autogiro does not connect with the engine, and it cannot transmit torque to the
vehicle.
What is the fundamental difference between the helicopter and the autogiros
The rotor powered by the engine in the cruise flight
How do single-rotor rotorcrafts provide control forces and
control moments
vertical force: main rotor thrust
Longitudinal force: main rotor tilt fore/aft
lateral force: main rotor tilt lateral
pitch attitude: main rotor tilt fore/ aft
roll attitude: main rotor tilt lateral
yaw attitude: tail rotor thrust/engine torque
How do tandem rotorcrafts provide control forces and
control moments
vertical force: collective man rotor thrusts
Longitudinal force: main rotors tilt fore/aft
lateral force: main rotors tilt lateral
pitch attitude: main rotor tilt fore/aft and/or differential main rotor thrust
roll attitude: main rotor tilt lateral
yaw attitude: differential main rotor tilt lateral
How do side-by-side rotorcrafts provide control forces and control moments
vertical force: collective main rotor thrust
Longitudinal force: main rotors tilt fore/aft
lateral force: main rotors tilt lateral
pitch attitude: main rotors tilt fore/aft
roll attitude: main rotors tilt lateral and/or differential main rotor thrust
yaw attitude: differential main rotor tilt fore/aft
The function of the swashplate
Adjust the blade control angle at different azimuth angles.
How do coaxial rotorcrafts provide control forces and
control moments
vertical force: collective man rotor thrusts
Longitudinal force: main rotors tilt fore/aft
lateral force: main rotors tilt lateral
pitch attitude: main rotor tilt fore/aft
roll attitude: main rotor tilt lateral
yaw attitude: differential main rotor torques
