The North American B-45 Tornado is an early American jet bomber designed and manufactured by aircraft company North American Aviation. It has the distinction of being the first operational jet bomber to enter service with the United States Air Force (USAF), as well as the first multiengine jet bomber to be refueled in midair. [1]

1951~1952年，美军在太平洋进行的一系列大气层核试验中，B-45A曾两次投下了为雷神导弹研制的Mark7战斗部。首架具备核攻击能力的B-45A于1952年5月抵达英国，到6月中旬全部40架“苦工”B-45部署到位。

The North American B-45 Tornado was the United States Air Force's first operational jet bomber, and the first multi-jet engined bomber in the world to be refuelled in mid-air.[2][3] The B-45 was an important part of the United States's nuclear deterrent for several years in the early 1950s, but...

The B-45A differed from the experimental B-45s in featuring improved ejection-type seats for the pilot and co-pilot and safer emergency escape hatches for the bombardier-navigator and tail...

The B-45 Tornado was the first American four-engine jet bomber to fly, and the first American production jet bomber, built by North American Aviation. It was also the first jet bomber capable of carrying an atomic bomb, and the first multi-jet reconnaissance aircraft to refuel in mid-air.

A North American B-45A Tornado (Serial No. 47-021) at the National Advisory Committee for Aeronautics (NACA) Langley Aeronautical Laboratory at Hampton, Virginia (USA). The B-45 was powered by four General Electric J35 turbojets, however, the aircraft's performance was not as high as was expected.

The North American B-45 Tornado was designed and produced by North American Aviation as a jet-powered bomber during the early years. It was known as the first operational jet bomber that served the United States Air Force, and the first multi-engine jet bomber to be refueled in midair.

The B-45 was the first American four-engine jet bomber to fly; the first American production jet bomber; the first jet bomber capable of carrying an atomic bomb; and the first multi-jet reconnaissance aircraft to refuel in mid-air. It was also the first jet bomber of the NATO Alliance, which was formed in 1949.

Apr 14, 2018 · Page details technical specifications, development, and operational history of the North American B-45 Tornado Jet-Powered Bomber Aircraft including pictures. The global defense reference actively compiled since 2003

Jun 23, 2006 · The B-45A was powered by four General Electric J47-GE-13 turbojet engines. The J47 was an axial-flow turbojet with a 12-stage compressor and single stage turbine.