1. A jet aircraft is in level flight at an altitude of 30,000 ft with an airspeed of 500 ft/s. The aircraft has a gross weight of 19,815 lb, a wingspan of 53.3 ft, and an average chord length of 6 ft. The Oswald efficiency factor is 0.81 and the zero-lift drag coefficient is equal to 0.02. The jet has two turbofan engines, each producing a maximum thrust of 3,650 lb at sea level. a. Create a plot of the drag polar for this aircraft for Cų from 0 to 5. Plot CL on the vertical axis, Cd on the horizontal axis, and do not include negative Cl values.
b. What is the total drag coefficient at the flight condition above?
c. What is the total drag force, in lb?
d. What is the required thrust for level flight at this altitude, in lb?
e. If the pilot runs the engines at maximum thrust, what is the instantaneous rate of climb at this altitude and velocity? Assume that the thrust available is proportional to the change

2. If the engines of above aircraft have a thrust specific fuel consumption of 0.6 (lb of fuel)/(lb thrust)/hr and the aircraft carries 7500 lb of fuel onboard.

a. Compute (and plot on the same axes) the endurance (in hours) for level flight for airspeeds from 100 to 1000 ft/s at altitudes of 0 ft, 15,000 ft, and 30,000 ft. Be sure to clearly identify all curves with labels or a legend.
b. Compute (and plot on the same axes) the range (in miles) for level flight for airspeeds from 100 to 1000 ft/s at altitudes of 0 ft, 15,000 ft, and 30,000 ft. Be sure to clearly identify all curves with labels or a legend