The overall B61 bomb was diameter by long, and weighed 695-715 pounds depending on version. This includes the outer aerodynamic shell, a crushable nose cone, parachute section in the tail, tail fins, etc. .
Nuclear core
The nuclear device within the outer B61 envelope is probably the same overall dimensions and weight as the W80warhead, which is in diameter, long and weighs about .
The W69 missile warhead was produced in the early 1970s for use in the AGM-69 SRAMShort Range Attack Missile. The W69 was in diameter and long, weighed 275 pounds, and had a yield of 170-200 kilotons. 1,500 W69 warheads were produced.
The W73 missile warhead was designed for the AGM-53 Condorair to ground missile. Other than being described as a derivative of the B61, details of the W73 design are poorly documented. Both the W73 and the Condor missile were cancelled and never entered service.
Two versions of the base W80 cruise missile warhead were designed and deployed. Both are the same basic size and shape and weight: 11.8 inches in diameter, 31.4 inches long, and weight of 290 pounds.
W80-0
The BGM-109 Tomahawk TLAM-N cruise missile was equipped with a W80-0 warhead. The W80-0 used supergrade plutonium with less inherent radioactivity, due to missile storage in close proximity to submarine crew. The weapon lacks the metal attachment points featured on the Mod 1 variant and instead features a plastic guard of some sort. The W80-0 has a variable yield of 5 or 150 kilotons. 367 W80-0 warheads were produced.
W80-1
The AGM-86 ALCM and ACMcruise missiles used the W80-1 variant warhead. It has a yield of 5 or 150 kilotons. 1,750 W80-1 warheads were produced.
The W81 missile warhead was designed for use on the SM-2 missile. An enhanced radiation version was proposed, but the final version was fission-only. Detailed dimensions and weight are unknown. Yields are described as 2-4 kilotons. The W81 was cancelled and never entered service.
The W84 is a LLNL design based on the B61, used in the Ground Launched Cruise Missile. It is slightly larger and heavier than the otherwise similar W80 warheads, possibly to make it safer for ground handling in the field. Between 300 and 350 W84 warheads were produced. They remain in US inactive inventory.
Used on the Pershing IIIRBM missile, the W85 was a cylinder in diameter and long. As the mission of the missile was directed at underground targets, the warhead was reinforced to withstand earth penetration and weighed 880 pounds. It had a variable yield from 5 to 80 kilotons. 120 W85 warheads were produced. They were recycled into B61 Mod 10 bombs after the Pershing II was scrapped.
The W86 warhead was a planned earth-penetrating warhead for the Pershing II missile. The W86 was cancelled after the Pershing II was changed from hard target to soft target missions in its design phase. No units were ever produced.
