The Mark 39 nuclear bomb and W39 nuclear warhead were versions of an American thermonuclear weapon, which were in service from 1957 to 1966. The mushroom cloud of the atomic bombing of Nagasaki, Japan, in 1945 lifted nuclear fallout some 18 km (60,000 feet) above the epicenter. ... The mushroom cloud of the atomic bombing of Nagasaki, Japan, 1945, rose some 18 km (11 mi) above the hypocenter. ...

The Mark 39 design was a thermonuclear bomb (see Teller-Ulam design) and had a yield of 3.8 megatons. The design is an improved Mark 15 nuclear bomb design (the TX-15-X3 design and Mark 39 Mod 0 were the same design). The Mark 15 was the first lightweight US thermonuclear bomb. The basics of the Teller-Ulam configuration: a fission bomb uses radiation to compress and heat a separate section of fusion fuel. ... A megaton or megatonne is a unit of mass equal to 1,000,000 metric tons, i. ... Mark 15 bomb The Mark 15 nuclear bomb was a 1950s American thermonuclear bomb, the first relatively lightweight (7,600 lb / 3450 kg) thermonuclear bomb created by the United States. ...

The W39 warhead is 35 inches in diameter and 106 inches long, with a weight of 6,230 to 6,400 pounds. It was used on the SM-62 Snark missile, Redstone IRBM missile, and in the B-58 Hustler weapons pod. Snark missile launch The Northrop SM-62 Snark was a specialised intercontinental missile with a nuclear warhead briefly operated by the US Strategic Air Command from 1958 until 1961. ... First launched in 1953, the American Redstone rocket was a direct descendant of the German V-2. ... The Convair B-58 Hustler was a high-speed jet bomber capable of supersonic flight. ...

The B39 bomb is 35 inches diameter and 140 inches long, with a weight of 6,650 to 6,750 pounds, and was carried by a number of aircraft.

See also

• List of nuclear weapons

This is a list of nuclear weapons ordered by state and then type within the states. ...

External links

• Allbombs.html list of all US nuclear weapons at nuclearweaponarchive.org