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Advanced Physics
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

Question
You may find it helpful to review Chapter 9, Section 9.3 "Fluid flow measurements" and Chapter 11, Section 11.1 "The Earth's atmosphere and winds" before attempting this question. An aircraft is flying at an altitude of 31000 feet at a speed of 450 knots. What pressure difference will be 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
Transcribed Image Text:You may find it helpful to review Chapter 9, Section 9.3 "Fluid flow measurements" and Chapter 11, Section 11.1 "The Earth's atmosphere and winds" before attempting this question. An aircraft is flying at an altitude of 31000 feet at a speed of 450 knots. What pressure difference will be 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
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