1. a) Draw the streamlines around a two-dimensional aerofoil at a modest angle [3 marks] of attack. b) Plot the variation of lift coefficient with angle of attack for a cambered aerofoil up to and including stall. Indicated and a1-0- da c) What is the value of the lift curve slope (d) for a two-dimensional aerofoil? da d) Draw a plot of the typical variation of pressure coefficient around a two- dimensional aerofoil at low and high angles of attack. (Chordwise location on the x-axis and Cp on the y-axis). e) Explain your understanding of the following (with sketches and mathematical expressions where appropriate): [3 marks] [1 mark] [3 marks] (i) the circulatory flow around a two-dimensional lifting aerofoil, (ii) the Kutta condition. [4 marks] [6 marks]