The Boeing RB-50E was an updated conversion of 14 RB-50Bs, which were originally built as B-50Bs. The E model was designed for photographic reconnaissance and specialized observation missions. The defensive armament of 13 .50-cal. machine guns was initially retained, but later removed on most (or all) aircraft. The major updates involved the reconnaissance equipment. Better cameras were installed; updated and relocated camera platforms were used to increase stabilization required for the higher resolution cameras. The RB-50E served well into the 1960s.
TECHNICAL NOTES (production B-50D): Armament: (Initially) 13 .50-cal. machine guns; none late in service life Engines: Four Pratt & Whitney R-4360-35 Wasp Major turbosupercharged radials of 3,500 hp each Maximum speed: 380 mph at 25,000 ft. and combat weight of 123,000 lbs. Cruising speed: 277 mph Range: 7,750 miles maximum ferry range Service ceiling: 36,700 ft. Span: 141 ft. 3 in. Length: 99 ft. 0 in. Height: 32 ft. 8 in. Weight: 173,000 lbs. (maximum takeoff weight) Crew: 10 Serial numbers: 47-119, -120, -122 to -132, -135