Boeing KC-97 Stratofreighter
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The Boeing KC-97 Stratofreighter is a four-engined, piston-powered United States strategic tanker aircraft based on the Boeing C-97 Stratofreighter. It replaced the KB-29 and was succeeded by the Boeing KC-135 Stratotanker.
A Boeing KC-97 Stratofreighter's refueling boom operator's station from the National Museum of the US Air Force
Two USAF A-7 Corsair IIs refueling from a KC-97.
Spanish Boeing KC-97L Stratofreighter at Albacete (1985)
Boeing KB-29 Superfortress
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The Boeing KB-29 was a modified Boeing B-29 Superfortress for air refueling needs by the USAF. Two primary versions were developed and produced: KB-29M and KB-29P.
Experimental Boeing YKB-29T Superfortress (Boeing B-29-90-BW Superfortress) 45–21734, assigned to the 421st Air Refueling Squadron, Yokota Air Base, Japan, 1954 Returned to United States and retired to AMARC, Feb 1955.
KB-29P tanker of 420th Air Refueling Squadron based at RAF Sculthorpe Norfolk in 1956