An aircraft is flying at an altitude of 31000 feet at a speed 81 produced with a pitot-static probe at this height and speed? Give your answer in kPa to 2 s.f. (Even if this question might be answered using either equations or graphs, use equations only to provide a more accurate result.) Suggested approach: Remember that the local air density at 31000 feet is less than the value at ground level, and find this value first. Use the standard atmospheric model and assume that 1 foot = 0.305m and 1 knot = 0.514 m s¹. Pressure difference: kPa

An aircraft is flying at an altitude of 31000 feet at a speed 81 produced with a pitot-static probe at this height and speed? Give your answer in kPa to 2 s.f. (Even if this question might be answered using either equations or graphs, use equations only to provide a more accurate result.) Suggested approach: Remember that the local air density at 31000 feet is less than the value at ground level, and find this value first. Use the standard atmospheric model and assume that 1 foot = 0.305m and 1 knot = 0.514 m s¹. Pressure difference: kPa