4. A full-scale Learjet Model 25D is installed in the NASA Ames full-scale wind tunnel facility. The NACA 65-210 wing spans the entire width of the tunnel (i.e., consider the wing as infinite). The angle-of-attack is set at 4 degrees. True airspeed is 200 knots. Assume Sea Level Standard Day atmospheric conditions. Calculate the total Lift, Drag and Pitching Moment about the chord point of the wing? The same airplane is taken out of the wind tunnel and flown at the same weight, angle-of-attack and airspeed under the same atmospheric conditions. The test pilot notices that he can no longer maintain straight and level flight. Is the aircraft climbing or descending? (20 pts) 5. The Calspan Learjet Model 25D has just departed Naval Air Station (NAS) Patuxent River, MD, at maximum gross weight. After burning 1,000 lb. of fuel, it is at Sea Level Standard Day conditions at a true airspeed of 150 knots when one of the two engines fail. The test pilot immediately applies full throttle to get maximum thrust from the remaining good engine. Can the aircraft maintain airspeed and altitude? (20 pts)