Unit 1

Equations of Motion – Forces Acting on the Aircraft – Review of Aerodynamic Characteristics of the Wing and Compressibility Effects – Review of Propulsion Systems and their Performance Characteristics – Drag Contribution from Aircraft Components – Airplane Performance of Turbojets: Steady Flight, Range, Endurance, Conditions for Maximum Range and Endurance, Climb Performance, Turn Performance, Maximum Load Factor During Turn.

Unit 2

Glide Performance – Take-Off and Landing Performance – Performance of Piston-Props: Steady Flight Climb and Turn Performance, Climb Performance, Turn Performance, Comparison with Turbojets – Turbofan and Turboprop Performance Evaluation Guidelines.

Unit 3

Concept of Static and Dynamic Stability – Longitudinal Stability: Neutral Point, Stick-Fixed and Stick Free Stability – Longitudinal Control – Hinge Moments – Control Power – Directional Stability and Control – Lateral Stability and Control – Introduction to Dynamic Stability – Stability Derivatives.

Objectives

• To understand the performance parameters and performance evaluation of aircrafts fitted with turbojet engines
• To understand the performance parameters and performance evaluation of aircrafts fitted with piston propeller engines
• To evaluate the longitudinal static stability of a fixed wing aircraft in low subsonic flow and introduce the concepts of static lateral and directional stability
• To introduce the concept of dynamic stability.

Course Outcomes

• CO1: Understand and apply equations of motion for an aircraft. Evaluate performance of turbojet aircrafts for climb, steady flight and turn.
• CO2: Glide and take-off and landing performance evaluation. Evaluate the climb, steady flight and turn performance of piston-engine aircrafts
• CO3: Able to evaluate longitudinal static stability and understand the principle of dynamic stability.

CO – PO Mapping

Textbook(s)

• Hale, Francis J, “Introduction to Aircraft Performance, Selection, and Design”. Wiley, 1984.
• Nelson.R.C, “Flight Stability and Automatic Control”, 2^nd edition, McGraw-Hill, 1998.

Reference(s)

• Perkins.C.D and Hage.R.E, “Aircraft Performance, Stability and Control”, 11^th edition, Wiley, 1967.
• Anderson.J.D,, “Aircraft Performance and Design”, McGraw-Hill, 2010.
• Russel.J.B, “Performance and stability of aircraft”, Butterworth-Heinemann, 1996

Evaluation Pattern