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.
Labels:
sylabus
