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". It is one of three strategic bombers in the
USAF fleet as of 2017, the other two being the B-2 Spirit "Stealth Bomber", and the B-52
Stratofortress.
In the early 1990s, following the Gulf War and concurrent with the disestablishment of
SAC and its reassignment to the newly formed Air Combat Command, the B-1B was converted
to conventional bombing use. It first served in combat during Operation Desert Fox in 1998
and again during the NATO action in Kosovo the following year. The B-1B has supported
U.S. and NATO military forces in Afghanistan and Iraq. The USAF had 66 B-1Bs in service
as of September 2012. The B-1B is expected to continue to serve into the 2030s, with
the Northrop Grumman B-21 Raider to begin replacing the B-1B after 2025. The B-1s currently
in inventory will reach the end of their service lives by 2045.
Unlike the B-1A, the B-1B cannot reach Mach 2+ speeds; its maximum speed is Mach 1.25
or 1,530 km/h, but its low-level speed increased to Mach 0.92 or 1,130 km/h. The speed of the
current version of the aircraft is limited by the need to avoid damage to its structure
and air intakes. To help lower its radar cross section, the B-1B uses serpentine air intake
ducts and fixed intake ramps, which limit its speed compared to the B-1A. Vanes in the
intake ducts serve to deflect and shield radar emissions from the highly reflective engine
compressor blades.
The B-1's main computer is the IBM AP-101, which is also used on the Space Shuttle orbiter
and the B-52 bomber. The computer is programmed with the JOVIAL programming language.
The B-1's defensive electronics include the Eaton AN/ALQ-161A radar warning and defensive
jamming equipment, which has three sets of antennas; one at the front base of each wing
and the third rear-facing in the tail radome. Also in the tail radome is the AN/ALQ-153
missile approach warning system.
Beginning in 2014, the B-1 was used by the U.S. against the Islamic State in the Syrian
Civil War. From August 2014 to January 2015, the B-1 accounted for eight percent of USAF
sorties during Operation Inherent Resolve. The 9th Bomb Squadron was deployed to Qatar
in July 2014 to support missions in Afghanistan, but when the air campaign against IS began
on 8 August, the aircraft were employed in Iraq. During the Battle of Kobane in Syria,
the squadron's B-1s dropped 660 bombs over 5 months in support of Kurdish forces defending
the city, one-third of all bombs used during OIR during the period, killing some 1,000
ISIL fighters. The 9th Bomb Squadron's B-1s went "Winchester", dropping all weapons on
board, 31 times during their deployment. They dropped over 2,000 JDAMs during the 6-month
rotation. B-1s from the 28th Bomb Wing flew 490 sorties where they dropped 3,800 munitions
on 3,700 targets during a six-month deployment. In February 2016, the B-1s were sent back
to the U.S. for cockpit upgrades.
As part of a USAF organizational realignment announced in April 2015, all B-1B aircraft
are to be reassigned from Air Combat Command to Global Strike Command effective 1 October
2015.
On 8 July 2017, the USAF flew two B-1 Lancers near the North Korean border in a show of
force amid increasing tensions, particularly in response to North Korea's 4 July test of
an ICBM capable of reaching Alaska.
GENERAL CHARACTERISTICS: Crew:
4 (aircraft commander, copilot, offensive systems officer, and defensive systems officer)
Height: 10.4 m Wing area: 181.2 m²
Empty weight: 87,100 kg Loaded weight: 148,000 kg
Max. takeoff weight: 216,400 kg
Fuel capacity, optional: 37,900 L fuel tank each in 1–3 internal
weapons bays
Powerplant:4 × General Electric F101-GE-102 augmented turbofans
Dry thrust: 77.4 kilonewton each Thrust with afterburner: 136.92 kilonewton
each
PERFORMANCE: Maximum speed:
At altitude: Mach 1.25 or 1,340 km/h at 12,000 m altitude
At low level: Mach 0.92 or 1,100 km/h at 60–150 m altitude
Range: 9,400 km Combat radius: 5,543 km
Service ceiling: 18,000 m Rate of climb: 1,731 m/min
Wing loading: 816 kg/m² Thrust/weight: 0.38
ARMAMENT:
Hardpoints: 6 external hardpoints for 23,000 kg of ordnance
and 3 internal bomb bays for 34,000 kg of ordnance.
Bombs: 84× Mk-82 Air inflatable retarder general
purpose bombs 81× Mk-82 low drag general purpose bombs
84× Mk-62 Quickstrike sea mines 24× Mk-84 general purpose bombs and others..
Previously up to 24× B61 or B83 nuclear bombs could be carried.
Number built: B-1A: 4
B-1B: 100
Unit cost: US $283.1 million
in 1998 (B-1B)
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