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C-123

C-123 Provider
AC Fairchild C123 colour.jpg
A United States Coast Guard HC-123B Provider from CGAS Miami.
Role Military transport aircraft
Manufacturer Chase Aircraft
Fairchild Aircraft
Designer Michael Stroukoff
First flight 14 October 1949
Introduction 1956
Retired United States Air Force c. 1980
Status Active with flying clubs
Primary users United States Air Force (historical)
United States Coast Guard (historical)
South Vietnamese Air Force (historical)
Produced 1949-1970
Number built 307
Developed from Chase XCG-20
Variants Chase XC-123A
Stroukoff YC-134

The Fairchild C-123 Provider is an American military transport aircraft designed by Chase Aircraft and subsequently built by Fairchild Aircraft for the United States Air Force. In addition to its USAF service, which included later service with the Air Force Reserve and Air National Guard, it also went on to serve most notably with the United States Coast Guard and various air forces in South East Asia. During the Vietnam War, the aircraft was 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 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.

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.


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