What is xb 70 valkyrie model?

The XB-70 Valkyrie was an experimental supersonic strategic bomber developed by the United States Air Force (USAF) in the 1960s. It was designed to reach Mach 3 speeds and fly at high altitudes, with the objective of penetrating Soviet airspace and delivering nuclear payloads.

The Valkyrie was a very large aircraft, with a wingspan of 105 feet and a length of 185 feet. It had a unique delta-wing design with a variable geometry feature that allowed the wings to be repositioned in-flight for different speeds and altitudes.

The XB-70 was powered by six General Electric YJ93 engines, which could produce a combined thrust of over 225,000 pounds. It was capable of reaching a top speed of Mach 3.1 (2,056 mph) and had a maximum altitude of 77,350 feet.

The XB-70 program was canceled in 1969 due to high costs and changes in strategic thinking. Two aircraft were built, and only one completed flight testing before being retired to a museum.

Overall, the XB-70 Valkyrie was an impressive technological achievement and a testament to the skills and ingenuity of the engineers and designers who worked on the project.