1. On June 26, 1990, the high temperature recorded at PHX at approximately 4 pm was 122°F and the barometric pressure was 29.65 inHg. (a) What was the air density at PHX at 4 pm on June 26, 1990? Find this value in both BG and SI units. (b) The takeoff ground roll distance for an aircraft is approximately given as 1.21 dro W/S g PCLmax (T/W) = = where W aircraft weight, S wing planform area, CLax maximum lift coefficient (a characteristic of the wing), and T = maximum engine thrust. The maximum available thrust for a turbofan engine is approximately directly proportional to air density. For an aircraft with a given takeoff weight, how much longer runway would be required on this hot day than would be required on a sea-level standard day (p = 1.225 kg/m³). Give this answer as a ratio or a percentage.

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1. On June 26, 1990, the high temperature recorded at PHX at approximately 4 pm was 122°F and the barometric pressure was 29.65 inHg. (a) What was the air density at PHX at 4 pm on June 26, 1990? Find this value in both BG and SI units. (b) The takeoff ground roll distance for an aircraft is approximately given as 1.21