a) The lift force, FL of on an aircraft depends on the air density p, aircraft speed, U, speed of sound c, chord length Le, and aerofoil thickness, t. By using Buckingham - construct the dimensionless parameters relationship of theorem, FL PUL = f) (8 marks) b) A model of an aircraft is developed with a scale of 1:30. If the lift force, FL generated for this model is 35 N for a velocity of 5 m/s, determine the velocity and the lift force of the prototype that the model is representing. Assume that the operating temperature of both model and prototype is constant. (2 marks)