JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

UNIT - I

Basic Concepts: Helicopter Configurations-Single Main Rotor/Tail Rotor Configuration, Tandem Rotors, Coaxial Rotors, Side-By-Side Rotors, Intermeshing Rotors; Main Rotor System-Fully Articulated, Semi-Rigid and Rigid Rotor Systems, Combination Rotor Systems, Swash Plate Assembly, Anti-Torque Systems-Tail Rotor, Fenestron, NOTAR; Helicopter Controls: Collective Pitch Control, Cyclic Pitch Control, Anti-Torque Pedals, Throttle Control

UNIT - II

Fundamentals of Rotor Aerodynamics: Momentum Theory Analysis in Hovering Flight, Disk Loading and Power Loading, Induced Inflow Ratio, Thrust and Power Coefficients, Comparison of Theory with Measured Rotor Performance, Non-Ideal Effects on Rotor Performance, Figure of Merit, Induced Tip Loss, Rotor Solidity and Blade Loading Coefficients, Momentum Analysis in Axial Climb and Descent, Momentum Analysis in Forward Flight

UNIT - III

Blade Element Analysis, Rotating Blade Motion: Blade Element Analysis in Hover and Axial flight, Forward Flight; Rotating Blade Motion-Introduction, Types of rotors, Equilibrium about the flapping hinge and lead-lag hinge, Equations of motion for a flapping blade, Blade feathering and the swash plate,

UNIT - IV

Helicopter Performance: Introduction, Hovering and Axial Climb Performance, Forward Flight Performance, Performance Analysis, Auto-Rotational Performance, Vortex Ring State, Ground Effect, Performance in Maneuvering Flight, Factors Influencing Performance Degradation

UNIT - V

Aerodynamic Design of Helicopters: Introduction, Overall Design Requirements, Conceptual and Preliminary Design Processes, Design of the Main Rotor, Fuselage Aerodynamic Issues, Empennage Design, Role of Wind Tunnels in Aerodynamic Design, Design of Tail Rotors, Other Ant-Torque Devices, High-Speed Rotorcraft

TEXT BOOKS

• 1. Principles of Helicopter Aerodynamics, 2nd edition, J. Gordon Leishman, Cambridge University Press, 2006 R16 B.TECH AERONAUTICAL ENGG.

REFERENCES:

• 1. Rotorcraft Aeromechanics, Wayne Johnson, Cambridge University Press, 2013
• 2. Aerodynamics of the Helicopter, Alfred Gessow and Garry C. Myers, Jr., Frederic Ungar Publishing Co, New York, 1985
• 3. Fundamentals of Helicopter Dynamics, C. Venkatesan, CRC Press, 2015
• 4. The Art of the Helicopter, John Watkinson, Elsevier, 2004
• 5. Helicopter Performance, Stability and Control, Raymond W. Prouty, Kriger Publishing Company, 1986
• 6. Basic Helicopter Aerodynamics, 3rd edition, John Seddon and Simon Newman, Wiley, 2011
• 7. Helicopter Engineering, Lalit Gupta, M. R. Sivaraman, Himalaya Publishing House, 2015 R16 B.TECH AERONAUTICAL ENGG.