Airframe Profile: B-1B Lancer
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By J.M. Eddins Jr.,Airman Magazine
For more than 30 years the B-1B Lancer has proven itself as an essential part of America’s long-range strategic bomber force. Capable of carrying the largest conventional payload of both guided and unguided weapons in the Air Force, the B-1 can rapidly deliver massive quantities of precision and non-precision weapons against any adversary, anywhere in the world, at any time.
The Rockwell B-1 Lancer is a supersonic variable-sweep wing, heavy bomber used by the United States Air Force. It is commonly called the "Bone" (from "B-One"). It is one of three strategic bombers in the U.S. Air Force fleet as of 2018, the other two being the B-2 Spirit "Stealth Bomber", and the B-52 Stratofortress. (Video // Andrew Arthur Breese)
The Air Force’s newly acquired B-52 Stratofortress hadn’t even taken off for it’s first flight before studies for its replacement began. Research started in the realm of a supersonic bomber resulting in the development of the B-58 Hustler and XB-70 Valkyrie in the late 50’s. Although cancelled, a joint NASA-U.S. Air Force flight research program continued to use the XB-70 prototypes, which were capable of reaching Mach 3.0, for research purposes into the late 60’s.
During that decade Air Force began to move away from developing high and fast bombers in favor of low-flying aircraft capable of penetrating enemy defenses.
In 1970 Rockwell International was awarded the contract to develop the B-1A, a new bomber capable of high efficiency cruising flight whether at subsonic speeds or at Mach 2.2. To meet all set mission requirements, such as takeoff and landing on runways shorter than those at established large bases, the B-1A was equipped with variable-sweep wings.
The first prototype flight occurred on December 23, 1974 and by the late 70’s four prototypes had been built, however, the program was canceled in 1977 before going into production.
Flight-testing of the prototypes continued through 1981 when, during the Reagan administration, the B-1 program was revived. For the B1-B, the Mach 2.2 number was dropped and the maximum speed limit set to about Mach 1.2 at high altitude due, in part, to changes from a variable air inlet to a fixed inlet. Other major changes included, an additional structure to increase payload to 74,000 pounds, an improved radar and reduction of the radar cross section.
The first production B-1 flew in October 1984, and the first B-1B was delivered to Dyess Air Force Base, Texas, in June 1985. Initial operational capability was achieved on Oct. 1, 1986. The final B-1B was delivered May 2, 1988.
The B-1B holds almost 50 world records for speed, payload, range, and time of climb in its class.
The B-1B was first used in combat in support of operations against Iraq during Operation Desert Fox in December 1998. In 1999, six B-1s were used in Yugoslavia during Operation Allied Force, delivering more than 20 percent of the total ordnance while flying less than 2 percent of the combat sorties.
During the first six months of Operation Enduring Freedom in Afghanistan, eight B-1s dropped nearly 40 percent of the total tonnage delivered by coalition air forces. This included nearly 3,900 JDAMs, or 67 percent of the total. In Operation Iraqi Freedom, the aircraft flew less than 1 percent of the combat missions while delivering 43 percent of the JDAMs used. The B-1 continues to be deployed today, flying missions daily in support of continuing operations.
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