Mark 8 nuclear bomb

A Mark 8 nuclear bomb

Closeup of the nose of a Mark 8

Closeup of the tail of a Mark 8

Diagram of the Mk8

TheMark 8 nuclear bombwas an Americannuclear bomb,designed in the late 1940s and early 1950s, which was in service from 1952 to 1957.

Description

The Mark 8 was agun-typenuclear bomb, which rapidly assembles severalcritical massesof fissile nuclear material by firing a fissile projectile or "bullet" over and around a fissile "target", using a system which closely resembles a medium-sized cannon barrel and propellant.

The Mark 8 was an early earth-penetrating bomb (seenuclear bunker buster), intended to dig into the earth some distance prior to detonating. According to one government source, the Mark 8 could penetrate 22 feet (6.7 m) of reinforced concrete, 90 feet (27 m) of hard sand, 120 feet (37 m) of clay, or 5 inches (13 cm) of hardened armor-plate steel.

The Mark 8 was 14.5 inches (37 cm) in diameter across its body and 116 to 132 inches (290 to 340 cm) long depending on submodel. It weighed 3,230 to 3,280 pounds (1,470 to 1,490 kg), and had a yield of 25-30kilotons.

A total of 40 Mark 8 bombs were produced.

The Mark 8 was succeeded by an improved variant, theMark 11 nuclear bomb.

Variants

The Mark 8 was considered as a cratering warhead for theSSM-N-8 Reguluscruise missile. ThisW8variant was cancelled in 1955.

A lighter Mark 8 variant, theMark 10 nuclear bomb,was developed as a lightweight airburst (surface target) bomb. The Mark 10 project was cancelled prior to introduction into service, replaced by the much more fissile-material-efficientMark 12 nuclear bombimplosion design.

See also

• List of nuclear weapons
• Mark 1 Little Boy nuclear bomb

External links

• Allbombs.htmllist of all US nuclear warheads atnuclearweaponarchive.org
• Coster-Mullen, John (2012).Atom Bombs: The Top Secret Inside Story of Little Boy and Fat Man.Waukesha, Wisconsin: J. Coster-Mullen.OCLC298514167.