1954 interceptor

WS-201A, informally known as the 1954 interceptor, was a US Air Force project to develop a dedicated interceptor aircraft that would enter service in 1954. Several aircraft were developed as part of the project, leading to the F-102 Delta Dagger, F-106 Delta Dart, XF-103 Thunderwarrior and, indirectly, the F-101B Voodoo and F-104 Starfighter. The electronics and weapons were also destined to become common, including the AIM-4 Falcon missile and a variety of Hughes Aircraft-supplied radar and fire control systems. The project also led, eventually, to the upgrading of the SAGE battle control computers to directly control the interceptors for much of their flight. Although greatly delayed, the resulting systems operated for approximately 20 years, into the 1980s.

The "1954 interceptor" concept first appeared shortly after the creation of the Air Force from the former US Army Air Force in the post-World War II era. With the re-arrangement of command, several new organizations within the Air Force were created, including Tactical Air Command (TAC) and Air Defense Command (ADC), who shared an interest in fighter aircraft. TAC was primarily tasked with offensive duties, but required capable fighters to protect their offensive capability. ADC was tasked solely with the defense of the US from enemy attack, in particular long-range bombers. Soon after their formation, TAC and ADC started moving away from each other in terms of requirements.

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