Boeing C-137 Stratoliner procurement of the Boeing 707 was very limited, amounting to three Model 707-153s designated VC-137A. When delivered in 1959 these had four 13,500 lb (6123 kg) dry thrust Pratt & Whitney J57 (JT3C6) turbojets; when subsequently re-engined with 18,000 lbf (80.1 kN) dry thrust TF33-P-5 (JT3D) turbofans they were redesignated VC-137B. Only one other variant served with the USAF: this was the VC-137C "Air Force One" presidential transport, the two examples of which were Model 707-320B Intercontinentals with specialized interior furnishings and advanced communications equipment. Two further non-presidential C-137C aircraft were later added. To supplement its VC-137s, the USAF converted
Boeing VC-25 H.W. Bush. The Air Force reported that the operating cost for each VC-25A in 2014 was $210,877 per hour. The VC-25 is capable of flying 7,800 miles (12,600 km)—roughly one-third the distance around the world—without refueling. The VC-25A can accommodate more than 70 passengers. Each VC-25A cost approximately US$325 million. When a VC-25 taxis to an airport's ramp for events, it stops with the port side of the aircraft facing gathered onlookers. While the VC-25 has two main decks and a cargo area, like a regular Boeing 747, its 4,000 square feet (370 m²) of floor space has been reconfigured