B-1B Lancer, Rockwell

The variable geometry B-1 bomber was designed as the successor for the elderly B-52. The B-1A was cancelled, partly because the high-flying bomber was obsolete, and partly for political reasons. The B-1B Lancer version, more optimised for low-altitude attacks and stealth, is now built in small numbers. The B1 turned out to be very maintenance intensive. Everything associated with the swing wing is a pain; hydro/fuel/vent swivels, actuators, flaps, spoilers, and slats.

Type: B-1B Lancer
Country: USA
Function: bomber
Year: 1986
Crew: 4
Engines: 4 * 13600 kg G.E. F101-GE-11
Wing Span: 41.67 m/23.84 m
Length: 44.81 m
Height: 10.36 m
Wing Area: 181.16 m2
Max.Weight: 216364 kg
Speed: 1375 km/h
Ceiling: 14600 m
Range: 12000 km
Armament: 29030 kgs
Unit cost: 200 million USD

Mission

Features

The B-1B's electronic jamming equipment, infrared countermeasures, radar location and warning systems complement its low-radar cross-section and form an integrated defense system for the aircraft.

The swing-wing design and turbofan engines not only provide greater range and high speed at low levels but they also enhance the bomber's survivability. Wing sweep at the full-forward position allows a short takeoff roll and a fast base-escape profile for airfields under attack. Once airborne, the wings are positioned for maximum cruise distance or high-speed penetration.

The B-1B uses radar and inertial navigation equipment enabling aircrews to globally navigate, update mission profiles and target coordinates in-flight, and precision bomb without the need for ground based navigation aids. Included in the B-1B offensive avionics are modular electronics that allow maintenance personnel to precisely identify technical difficulties and replace avionics components in a fast, efficient manner on the ground.

The aircraft's AN/ALQ 161A defensive avionics is a comprehensive electronic counter-measures package that detects and counters enemy radar threats. It also has the capability to detect and counter missiles attacking from the rear. It defends the aircraft by applying the appropriate counter-measures, such as electronic jamming or dispensing expendable chaff and flares. Similar to the offensive avionics, the defensive suite has a re-programmable design that allows in-flight changes to be made to counter new or changing threats.

The B-1B represents a major upgrade in U.S. long-range capabilities over the aging B-52 -- the previous mainstay of the bomber fleet. Significant advantages include:

• Low radar cross-section to make detection considerably more difficult.
  
• Ability to fly lower and faster while carrying a larger payload.
  
• Advanced electronic countermeasures to enhance survivability.
  

Background