JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

UNIT - I

INTRODUCTION: Degree Of Freedom Of A System, Static And Dynamic Stability. Need For Stability In An Airplanes. Purpose Of Controls, Inherently And Marginally Stable Airplanes. EQUATIONS OF MOTION: Equations Of Motion Of A Rigid Body. Inertial Forces And Moments. Equations Of Motion Of Flight Vehicles. Aerodynamic Forces And Moments. Decoupling Of Longitudinal And Lateral-Directional Equations. Linearization Of Equations.

UNIT - II

AERODYNAMIC STABILITY DERIVATIVES: Aerodynamic Stability And Control Derivatives. Relation To Geometry, Flight Configuration. Effects Of Power, Compressibility, And Flexibility.

UNIT - III

STATIC LONGITUDINAL STABILITY - CONTROL FREE: Effects Of Releasing The Elevator. Hinge Moment Coefficients, Control Forces To Trim. Control Free Neutral Point - Trim Tabs. Aerodynamic Balancing Of Control Surfaces. Means Of Augmentation Of Control. MANEUVER STABILITY: Contribution Of Pitch Damping To Pitching Moment Of Flight Vehicle, Effect On Trim And Stability. Control Deflections And Control Forces For Trim In Symmetric Maneuvers And Coordinated Turns. Control Deflection And Force Gradients. Control Fixed And Control Free Maneuver Stability. Maneuver Points. Maneuver Margins.

UNIT - IV

STATIC LONGITUDINAL STABILITY AND CONTROL - CONTROL FIXED: STICK FIXED: Basic Equilibrium Equation, Stability Criterion, Contribution Of Wing And Tail And Elevator To Pitching Moments. Effect Of Fuselage And Nacelles, Effects Of Center Of Gravity Location, Power Effects Stabilizer Setting And Center Of Gravity Location, Elevator Power, Elevator To Trim . Trim Gradients. Control Fixed Static Stability, Control Fixed Neutral Point. Stability Margins.

UNIT - V

STATIC LATERAL AND DIRECTIONAL STABILITY AND CONTROL: Dihedral Effect, Coupling Between Rolling And Yawing Moment, Adverse Yaw, Aileron Power, Aileron Reversal. Weather Cocking Effects, Rudder Power. Lateral And Directional Stability- Definition. Control Surface Deflections In Steady Sideslips, Rolls And Turns One Engine Inoperative Conditions, Rudder Lock.

R16 B.TECH AERONAUTICAL ENGG.

DYNAMIC STABILITY AND RESPONSE TO CONTROL: Solutions To The Stability Quadratic Of The Linearised Equations Of Motion. The Principal Modes. Phugoid , Short Period Dutch Roll And Spiral Modes, Further Approximations. Restricted Degrees Of Motion. Solutions. Response To Controls. Auto Rotation And Spin.

TEXT BOOKS:

• 1. Houghton E. L, Carruthers N. B. (2010), Aerodynamics For Engineering Students, 5th Edition, Elsevier, USA.
• 2. Mc. Cormic B. W. (2010), Aerodynamics, Aeronautics And Flight Mechanics, Wiley India Pvt. Ltd, USA.

REFERENCE BOOKS:

• 1. Perkins C. D, Robert Hage E (2003), Airplane Performance, Stability And Control, Wiley Toppan, USA.
• 2. Nelson R. C (2007), Flight Stability And Automatic Control, Sie Edition, MCGRAW Hill, New York.
• 3. T. R. Yechout, S. L. Morns (2003), Introduction To Aircraft Flight Mechanics, Aiaa Publishers, USA. R16 B.TECH AERONAUTICAL ENGG.