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B-1 Lancer

The B-1 Lancer is a supersonic, variable-sweep-wing heavy bomber used by the United States Air Force.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

The B-1 Lancer is a supersonic, variable-sweep-wing heavy bomber used by the United States Air Force. First fielded as the B-1B in the 1980s, it is now a long-range conventional strike aircraft and one of the U.S. Air Force’s three strategic bomber types.

Development

Rockwell developed the B-1 as a replacement for older U.S. bombers, with the B-1A first flying in 1974. The programme later produced the B-1B, which entered service in 1986 and incorporated design changes intended to improve survivability.

Design and capabilities

The B-1 Lancer uses variable-sweep wings and is built for long-range, high-speed strike missions. The B-1B can carry a very large conventional payload and is designed for rapid global attack missions.

Operational history

The B-1B served in a nuclear role initially but was converted to conventional missions in the mid-1990s. It has remained in U.S. Air Force service as a long-range bomber.

Role in the U.S. bomber force

The B-1B is part of the U.S. Air Force’s strategic bomber fleet and complements the B-2 Spirit and B-52 Stratofortress. Its emphasis is on high-volume conventional strike rather than nuclear delivery.

Key facts

  • The B-1 was originally developed during the Cold War to penetrate Soviet air defences.
  • The current B-1B variant is a supersonic conventional bomber.
  • It is one of the U.S. Air Force’s three strategic bomber types, alongside the B-2 Spirit and B-52 Stratofortress.
  • The aircraft is known as the “Bone,” derived from “B-One.”
  • The B-1B carries the largest conventional payload in the U.S. Air Force inventory.
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Canadian context

Canada does not operate the B-1 Lancer, but the aircraft is relevant to Canadian readers as part of North American defence and U.S. strategic airpower.

Frequently asked questions

What is the B-1 Lancer?
It is a U.S. Air Force supersonic heavy bomber with variable-sweep wings, best known in service as the B-1B.
Why is it called the Bone?
The nickname comes from “B-One,” a spoken form of “B-1.”
Does the B-1 carry nuclear weapons?
The B-1B was originally designed for nuclear missions, but it was transitioned to an exclusively conventional role in the mid-1990s.
How fast is the B-1 Lancer?
The B-1B is capable of supersonic flight, with a cited top speed of about Mach 1.2.
How much can it carry?
It can carry up to 75,000 pounds (34,000 kg) of weapons, the largest conventional payload in the U.S. Air Force inventory.

References

  1. U.S. Air Force — https://www.af.mil/About-Us/Fact-Sheets/Display/Article/104500/b-1b-lancer/
    Supports: Primary role, payload, and service description of the B-1B Lancer.
  2. Boeing — https://www.boeing.com/defense/fighters-and-bombers/b-1-lancer
    Supports: Nickname, service history, and conventional role.
  3. Encyclopaedia Britannica — https://www.britannica.com/technology/B-1-bomber-aircraft
    Supports: Development history, B-1A/B-1B variants, and design context.
  4. Wikipedia — https://en.wikipedia.org/wiki/Rockwell_B-1_Lancer
    Supports: General overview, bomber type, nickname, and U.S. strategic bomber fleet context.