AE3691 Flight Dynamics Syllabus:
AE3691 Flight Dynamics Syllabus – Anna University Regulation 2021
COURSE OBJECTIVE:
• Know about the forces and moments that are acting on an aircraft, the different types of drag, drag polar, ISA, variation of thrust, power, SFC with velocity and altitude.
• Have understanding about performance in level flight, minimum drag and power required, climbing, gliding and turning flight, v-n diagram and load factor.
• Knowledge about degrees of stability, stick fixed and stick free stability, stability criteria, effect of fuselage and CG location, stick forces, aerodynamic balancing.
• Understanding about lateral control, rolling and yawing moments, static directional stability, rudder and aileron control requirements and rudder lock.
• Understanding about dynamic longitudinal stability, stability derivatives, modes and stability criterion, lateral and directional dynamic stability.
UNIT I CRUISING FLIGHT PERFORMANCE
Forces and moments acting on a flight vehicle – Equation of motion of a rigid flight vehicle – Different types of drag –estimation of parasite drag co-efficient by proper area method- Drag polar of vehicles from low speed to high speeds – Variation of thrust, power with velocity and altitudes for air breathing engines . Performance of airplane in level flight – Power available and power required curves. Maximum speed in level flight – Conditions for minimum drag and power required
UNIT II MANOEUVERING FLIGHT PERFORMANCE
Range and endurance – Climbing and gliding flight (Maximum rate of climb and steepest angle of climb, minimum rate of sink and shallowest angle of glide) – Takeoff and landing – Turning performance (Turning rate turn radius). Bank angle and load factor – limitations on turn – V-n diagram and load factor.
UNIT III STATIC LONGITUDINAL STABILITY
Degree of freedom of rigid bodies in space – Static and dynamic stability – Purpose of controls in airplanes -Inherently stable and marginal stable airplanes – Static, Longitudinal stability – Stick fixed stability – Basic equilibrium equation – Stability criterion – Effects of fuselage and nacelle – Influence of CG location – Power effects – Stick fixed neutral point – Stick free stability-Hinge moment coefficient – Stick free neutral pointsSymmetric maneuvers – Stick force gradients – Stick force per ‘g’ – Aerodynamic balancing.
UNIT IV LATERAL AND DIRECTIONAL STABILITY
Dihedral effect – Lateral control – Coupling between rolling and yawing moments – Adverse yaw effects – Aileron reversal – Static directional stability – Weather cocking effect – Rudder requirements – One engine inoperative condition – Rudder lock.
UNIT V DYNAMIC STABILITY
Introduction to dynamic longitudinal stability: – Modes of stability, effect of freeing the stick – Brief description of lateral and directional. dynamic stability – Spiral, divergence, Dutch roll, auto rotation and spin.
TOTAL: 75 PERIODS
COURSE OUTCOMES:
On successful completion of this course, the student will be able to
CO1: Build an understanding about forces & moments of an aircraft, types of drag, drag polar, and performance in level flight
CO2: Develop an understanding about basic maneuvering performance (range, endurance, climbing, gliding & turning flight), v-n diagram and load factor.
CO3: Build knowledge about degrees of stability, stick fixed & stick free stability, stability criteria, effect of fuselage & CG location, stick forces, aerodynamic balancing.
CO4: Explanation about lateral control, rolling & yawing moments, static directional stability, rudder & aileron control requirements and rudder lock.
CO5: Illustration about dynamic longitudinal stability, stability derivatives, modes & stability criterion, lateral and directional dynamic stability.
TEXT BOOKS:
1. Mc Cornick. W., “Aerodynamics, Aeronautics and Flight Mechanics”, John Wiley, NY, 1979.
2. Nelson, R.C. “Flight Stability and Automatic Control”, McGraw-Hill Book Co., 2004.
3. Perkins, C.D., and Hage, R.E., “Airplane Performance stability and Control”, John Wiley &Son:, Inc, NY, 1988.
REFERENCES :
1. Babister, A.W., “Aircraft Dynamic Stability and Response”, Pergamon Press, Oxford, 1980.
2. Dommasch, D.O., Sherby, S.S., and Connolly, T.F., “Aeroplane Aero dynamics”, Third Edition, Issac Pitman, London, 1981.
3. Etkin, B., “Dynamics of Flight Stability and Control”, Edn. 2, John Wiley, NY, 1982.
4. Mc Cornick B. W, “Aerodynamics, Aeronautics and Flight Mechanics”, John Wiley, NY, 1995.