- An airplane equipped with float is catapulted (t) into the air from a Navy Cruiser as shown in Figure 3. The catapulting force P gives the airplane a constant horizontal acceleration of 3g (96.6 ft/sec). The gross weight of airplane 9000 lb. and the catapult track is 35 ft. long. The engine thrust is 900 lb. Please find (a) the catapulting force P. (15%) (b) the reactions R, and R from the catapult car. (10%) (c) the airplane velocity at the end of track run. (10%) 900 lb. 1 55 512 R 78" 9000 lb. 85". Fig, 3 Ra Thrust Line L.