Unit 1 : Introduction

1.1 Working Principle of Helicopters

1.2 Types of rotorcraft

1.3 Components of Helicopters

1.4 Helicopter Configurations

2.1 Development of Helicopter

2.2 Challenges addressed by early researchers

3.1 Components of Main Rotor System

3.2 Rotor Systems

• Fully Articulated Rotor

• Semi-Articulated Rotor

• Rigid Rotor

3.3 Helicopter Control System

• Collective and Cyclic Pitch Control

• Anti-Torque Control

• Pitch Control

4.1 Anti-Torque System

4.2 Types of Anti-Torque Systems

• Tail Rotor

• Fenestron

• NOTOR