The Fairchild C-123 Provider is an American military transport aircraft designed by Chase Aircraft and then built by Fairchild Aircraft for the U.S. Air Force. In addition to its USAF service, which included later service with the Air Force Reserve and the Air National Guard, it also went on to serve most notably with the U.S. Coast Guard and various air forces in Southeast Asia. During the War in Vietnam, the C-123 was used to deliver supplies, to evacuate the wounded, and also used to spray Agent Orange. The C-123 Provider was designed originally as an assault glider aircraft for the United States Air Force (USAF) by Chase Aircraft as the XCG-20 (Chase designation MS-8 Avitruc) Two powered variants of the XCG-20 were developed during the early 1950s, as the XC-123 and XC-123A. The only difference between the two was the type of engines used. The XC-123 used two Pratt & Whitney R-2800-23 air-cooled radial piston engines, while the XC-123A was fitted with four General Electric J47-GE-11 turbojets, in two pods. The XC-123A also has the distinction, while only experimental, of being the USAF first jet-powered military transport. While the piston-powered XC-123 was initially well-regarded for tactical transport for its ruggedness and reliability, and its ability to operate from short and unimproved airstrips, the turbojet-powered XC-123A – designed for high-speed transport between USAF bases for critical parts and personnel – was found unable to operate from short and rough airstrips. There was also no practical speed advantage due to the wing and fuselage design, and a drastic reduction in range. Only the one turbojet-powered test and evaluation version was built. While the United States Air Force was interested in placing an order for the new transport, Chase did not have the production capacity to meet the Air Force's needs, and sought a partner to handle production of the new aircraft. By 1953, Henry J. Kaiser purchased a majority share in Chase Aircraft, feeling that after having completed C-119s for Fairchild under contract, he could take control of the impending C-123 contract. Two airframes were completed at Kaiser's Willow Run factory in Ypsilanti, Michigan, before a pricing scandal that led to Kaiser's being told that no further contracts with him would be honored. The C-123 contract was put up for bid, and the two completed airframes scrapped. The contract was finally awarded to Fairchild Engine and Airplane, who assumed production of the former Chase C-123B, a refined version of the XC-123. Before turning production over to Fairchild, Chase originally named their C-123B the AVITRUC but it never stuck. Produced 1949–1970 Number built 307 For details of operational history and variants, click here.
