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AE2025 HELICOPTER THEORY CLASS NOTES AND LAST YEAR QUUESTION PAPERS


AE2025 HELICOPTER THEORY CLASS NOTES AND LAST YEAR QUUESTION PAPERS

OBJECTIVE:
To present the basic ideas of evolution, performance and associated stability problems of
helicopter.

UNIT I   DEVELOPMENT OF ROTATING WING AIRCRAFT         
Evolution   of     helicopter-Helicopter                            configurations-rotor        arrangements-compound
Helicopter - jet rotor-no tail rotor concepts

UNIT II DYNAMICS OF HOVERING FLIGHT                                   
Actuator disc theory-Blade Element Theory-ideal twist Induced & profile power-Figure of
merit-Thrust and power coefficients-calculation of drag, torque, power-Ground effect in
hover- Estimation of hover ceiling.

UNIT III DYNAMICS OF FORWARD FLIGHT                                  
Forward flight performance-Parasite drag and Power-Stall limitations-flapping-cyclic pitch-Autorotation in hover and in forward flight-Dead man's curve.

UNIT IV CLIMB AND DESCENT PERFORMANCE                         
Vertical flight-flow patterns surrounding the rotor-Power required in climb and descent- Descent speed calculations-Take-off techniques.

UNIT V   HELICOPTER STABILITY AND CONTROL                     
Trim-Static stability-dynamic stability-Pilot's control-Rotor control-Flight control
systems and stability argumentation-Flying qualities.

TEXT BOOK:
1. Gessow A & Myers G.C "Aerodynamics of Helicopter" Mac Millan & Co, 1987
REFERENCES:
1. Gupta. L "Helicopter Engineering", Himalayan Books, 1996
2. Saunders "Dynamics of Helicopter flight", John Wiley, 1975
3. Newman. S "Foundation of Helicopter Flight" Halsted Press, 1994

4. Seddon. J "Basic Helicopter Aerodynamics" AIAA education series, 1990. 


 
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