A small prop plane provides two-hour flying tours of the Los Angeles basin. The

Question

A small prop plane provides two-hour flying tours of the Los Angeles basin. The aircraft has a wingspan of 45 ft, a planform area of 225 ft:. a zero-lift drag coefficient of 0.03 and an Oswald efficiency of 0.92. The propulsion system has an efficiency of 75% and a SFC of 0.38 lb fuel/hp/hr. To maximize flight endurance, what design point should be targeted in terms of lift and drag and what is the value of this design point. For the current flight, there is a temperature inversion over the basin as shown. If the plane is flying at 8000 ft, compute the outside air temperature and density assuming standard sea level pressure at z = 0 ft. Assuming that the tour flics at 8000 ft for two hours with an initial aircraft weight of 6000 Ibf, what is the weight after the two hour tour assuming optimal lift-drag values for endurance? At what speed is the aircraft flying at the start and at the end of this tour in order to maintain the optimal lift-drag values for endurance?

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