Proposals were submitted by Boeing, General Dynamics and North American Rockwell in January 1970.[31][32] In June 1970, North American Rockwell's design was selected and was awarded a development contract.[31] The original program called for two test airframes, five flyable aircraft, and 40 engines. This was cut in 1971 to one ground and three flight test aircraft.[33] The company changed its name to Rockwell International and named its aircraft division North American Aircraft Operations in 1973.[34] A fourth prototype, built to production standards, was ordered in the fiscal year 1976 budget. Plans called for 240 B-1As to be built, with initial operational capability set for 1979

DEVELOPMENT

ARMAMENT

Optional Payloads:

84 x Mk-82 Low Drag GP bombs

24 x Mk-84 GP bombs

30 × CBU-103/104/CBU-105 Cluster Bombs
Designated 87/89/97 w/o WCMD kit

24 x GBU-31 JDAM GPS guided bombs
(Mk-84 GP or BLU-109 warheads)

15 x GBU-38 JDAM GPS guided bombs
(Mk-82 GP warhead)

24 x AGM-154 Joint Standoff Weapons (JSOW)

24 x AGM-158 Joint Air to Surface Standoff Missiles (JASSM)

Mines

84 x Mk-62 Quickstrike naval mines

24 × Mk-65 naval mines

Nuclear

24 × B61 Thermonuclear bombs

24 × B83 Thermonuclear Bombs

AVIONICS

IBM AP-101F
Computer

1× AN/ALQ-161
Radar warning and jamming systems

Sniper Advanced Targeting Pod
Targeting

APQ-164 Radar
Passive Phased Array Radar

PERFORMANCE

MAX SPEED
830 Mph (50,000 ft)

RANGE
7,455 Miles

CEILING
60,000 ft

MAX THRUST
4 x 30,780 lbf

THRUST/WEIGHT RATIO
0.30