Finite wings

Question 1

Stall incidence

Answer 1

beyond the stall incidence, Cl decreases with increasing incidence. In a stall, the boundary layer over the upper surface is unable to follow the aerofoil’s surface

Question 2

variation of lift coefficient with incidence

Answer 2

Question 3

stall speed

Answer 3

Stalling speed increases with height as the air density decreases

Question 4

variation of drag coefficient with lift coefficient

Answer 4

Question 5

Calibration of aircraft instrumentation

Answer 5

Aircraft instrumentation is often calibrated in terms of Equivalent Air Speed to prevent confusion due to the variation of speed with altitude

Question 6

True Air Speed

Answer 6

the actual speed of the aircraft through the air

Question 7

Equivalent Air Speed

Answer 7

the speed of an aircraft at sea level which has the same dynamic pressure as an aircraft flying at TAS at altitude

Question 8

Equivalent air speed equation

Answer 8

Question 9

High lift devices

Answer 9

Can be used to increased Cl_max

increasing Cl_max reduces the stall speed

located on the wing trailing and leading edges