North American F-100D Super Sabre

F-100 Super Sabre
A four-ship formation of F-100C-25-NA Super Sabres
Role	Fighter/fighter-bomber
Manufacturer	North American Aviation
First flight	25 May 1953
Introduction	27 September 1954
Retired	1979, United States Air National Guard; 1988, Republic of China Air Force
Status	Retired
Primary users	United States Air Force Turkish Air Force Republic of China Air Force French Air Force
Produced	1953–1959
Number built	2,294
Unit cost	US$697,029 (F-100D) ($6.22 million in today's dollars)
Developed from	North American F-86 Sabre
Developed into	North American F-107

The North American F-100 Super Sabre was an American supersonic jet fighter aircraft that served with the United States Air Force (USAF) from 1954 to 1971 and with the Air National Guard (ANG) until 1979. The first of the Century Series of USAF jet fighters, it was the first USAF fighter capable of supersonic speed in level flight. The F-100 was designed by North American Aviation as a higher performance follow-on to the F-86 Sabre air superiority fighter.

Adapted as a fighter-bomber, the F-100 was supplanted by the Mach two-class F-105 Thunderchief for strike missions over North Vietnam. The F-100 flew extensively over South Vietnam as the air force's primary close air support jet until being replaced by the more efficient subsonic LTV A-7 Corsair II. The F-100 also served in other NATO air forces and with other U.S. allies. In its later life, it was often referred to as the Hun, a shortened version of "one hundred".

In January 1951, North American Aviation delivered an unsolicited proposal for a supersonic day fighter to the United States Air Force. Named Sabre 45 because of its 45° wing sweep, it represented an evolution of the F-86 Sabre. The mockup was inspected on 7 July 1951, and after over a hundred modifications, the new aircraft was accepted as the F-100 on 30 November 1951. Extensive use of titanium throughout the aircraft was notable. On 3 January 1952, the USAF ordered two prototypes followed by 23 F-100As in February and an additional 250 F-100As in August.

The YF-100A first flew on 25 May 1953, seven months ahead of schedule. It reached Mach 1.04 in spite of being fitted with a de-rated XJ57-P-7 engine. The second prototype flew on 14 October 1953, followed by the first production F-100A on 9 October 1953. The USAF operational evaluation from November 1953 to December 1955, found the new fighter to have superior performance but declared it not ready for wide-scale deployment due to various deficiencies in the design. These findings were subsequently confirmed during "Project Hot Rod" operational suitability tests.