B-36 BOMBER PREPARES FOR TAKEOFF- Convair' s 358,000-pound B-36 bomber, world's largest, is readied for test flight at Convair's Fort Worth division, where B-36s are built. In right background is hangar building and at left is electronics building. A portion of 4,000-foot assembly building can be seen in extreme left background. Total wing-spread of B-36 is 230 feet from tip to tip.