An A-6 Intruder is launched by catapult from the deck of the U. S.S. Nimitz aircraft carrier while the carrier is not moving and there is no wind. The airplane weighs 49,000 lbs and has a wing area of 529 ft2. The pilot sets the engines to the maximum thrust of 17,000 lbs (total for both engines; constant during takeoff). The catapult length is 400 ft. As the airplane leaves the catapult, its speed relative to the deck is 140 knots, which is 1.25Vstall. Assume that the drag and rolling resistance terms are negligible. What is the CLmax of the A-6 in takeoff configuration?

Ashielded metal arc-welding operation is accomplished in a work cell by a fitter and a welder. the fitter takes 5.5 min to load components into the welding fixture at the beginning of the work cycle, and 1.5 min to unload the completed weldment at the end of the cycle. the total ength of the weld seams 1200 mm, and the travel speed used by the welder averages 300 mm/min. every 600 mm of seam length, the welding stick must be changed, which takes 0.8 min. while the fitter is working, the welder is idle (resting): and while the welder is working the fitter is idle. (a) determine the average arc-on time as a fraction of the work cycle time. (b) how much improvement in arc-on time would result if the welder used flux-cored arc welding (manually operated), given that the spool of weld wire must be changed every 10 weldments, and it takes the welder 5.0 min to accomplish the change? (c) what are the production rates for these two cases (weldments completed per hour)? attach your work and solutions.