The North American Aviation XB-70 Valkyrie is a retired prototype version of the planned B-70 nuclear -armed, deep-penetration supersonic strategic bomber for the United States Air Force Strategic Air Command.

The Boom XB-1 "Baby Boom" is a retired one-third-scale trijet supersonic demonstrator designed by Boom Technology as part of the development of the Boom Overture supersonic transport airliner.

The Martin XB-51 was an American trijet ground-attack aircraft. It was designed in 1945 and made its maiden flight in 1949. It was originally designed as a bomber for the United States Army Air Forces under specification V-8237-1 and was designated XA-45.

Conceived in the 1950s as an intercontinental strategic nuclear bomber, the futuristic Valkyrie instead became a unique test aircraft in the 1960s. Higher and Faster: B-70 Bomber Concept.

Feb 28, 2014 · To achieve Mach 3 performance, the XB-70 was designed to “ride” its own shock wave, much as a surfer rides an ocean wave. The resulting shape used a delta wing on a slab-sided fuselage that contained the six jet engines that powered the …

Jan 11, 2025 · Built during the height of the Cold War, the XB-70 was conceived as a supersonic bomber capable of cruising at Mach 3—three times the speed of sound—while delivering nuclear payloads deep into enemy territory. It wasn’t just a bomber; it was a …

Nov 27, 2020 · The Air Force’s XB-70 Valkyrie was the fastest bomber ever developed. What killed it? And could it have been used for another purpose?

Sep 7, 2021 · A truly groundbreaking aircraft, the XB-70 laid the foundation for future supersonic aircraft programs and provided invaluable insights into aircraft design for decades to come. It’s a personal favorite aircraft of many Boom employees, and an engineering marvel of its time.

Mar 24, 2025 · As a demonstrator aircraft, XB-1 is ideally suited for testing new materials and technologies. Think of it as a flying data collector supported by a team of flight test engineers. The ultimate goal of MicroTau’s tests was to de-risk the technology for broader U.S. Air Force legacy aircraft and commercial applications, and its potential ...

Jan 28, 2025 · Boom Supersonic's XB-1 demonstrator aircraft soared past the speed of sound in a test flight on Tuesday —the first time a plane has accomplished that feat without the fuels of government...