C1

Question 1

Which of the following are categorised as rotorcraft: Helicopter, Autogiros, Tiltrotor, Hot air balloon with fans, Propellor aircraft

Answer 1

Helicopter Autogiros Tiltrotor

Question 2

What are the two main issues driving rotor configurations used in early rotorcraft development ?

Answer 2

Torque balance, rolling moment in forward flight

Question 3

How does single rotor helicopter deal with rolling moment in forward flight ?

Answer 3

Flapping Motion

Question 4

How does single-rotor deal with torque balance ?

Answer 4

Tail Rotor

Question 5

What’s the difference between the helicopter and autogiro ?

Answer 5

Hover capability, helicopter is larger, autogiro not equipped with rotor control inputs, autogiros cannot take off vertically without pre-rotator, rotor powered by engine in cruise flight

Question 6

Why does rotor of autogiro not need a tail rotor ?

Answer 6

Rotor doesn’t connect with engine and cannot transmit torque to vehicle

Question 7

What is fundamental difference between helicopter and autogiro ?

Answer 7

The rotor powered by engine in cruise flight

Question 8

Function of swashplate ?

Answer 8

adjust blade control angle at different azimuth angles