a. Explain vonicity and circulation. How are they related?
b. What is meant by aerodynamic heating? Discuss the consequences.

State and explain Buckingham Pitheorem. [3+3+3=9]

5.
a. How lift is generated in an aircraft? What are the various factors that affect lift? Explain their
effects.
b. Sketch the lift curve, drag curve and lift-drag ratio curve. What is the importance of
WD rati o?
௦. What is meant by stalling? What are the causes of stall? Explain stall recovery procedure.
[3+3+3=9]
6.
a. Withthe help ofa diagram explain the nomenclature of an airfoil.
b. Give detailed account of NACA series of airfoils with typical examples. Also give their
specifications. [3+6=9] Part C
i.
a. What are aerodynamic coefficients? Discuss the effect of angle of attack on aerodynamic
coefficients.
b. Distinguish between centre of pressure and aerodynamic centre. How do they vary with angle
of attack?
c. Define Mach number, Critical Mach number and Drag divergence Mach number. What is
Mach number independence? 14+4+4=121
8.
a. What is wind tunnel? What are the different types of wind tunnels? Explain the operation of
any one type of wind tunnel with a suitable sketch.
b. Write notes on the control surfaces of an aircraft.
c. What is meant by high lift devices? What are the different types of high lift devices? Explain
their actions. 16+3+3—12]
9.

a. What is drag polar? Obtain an expression for drag polar and explain its feature with
necessary sketches.

b. Describe flow similarity and similarity parameters.
c. Give an account of the general classification of aerospace vehicles. [4.4+4-12]