The aircraft reaches an altitude of 30000 and begins cruising. The mass of the aircraft at the start of cruise is 78 o and the fuel load that can be used for cruise is 12 o.
a) assuming a cruise at constant altitude, determine the cruise range as well as the optimal airspeed and Mach number at both beginning and end of cruise.
b) assuming cruise at a constant airspeed (given by the optimal airspeed at the beginning of cruise) with a drag ratio = 3, determine the cruise range as well as the altitude the aircraft reaches at the end of cruise.
c) assuming cruise at a constant airspeed (given by the optimal airspeed at the beginning of cruise), what would be the tailwind speed required to increase the range to 4700 m (assume tailwind remains constant throughout the cruise)?