Red Snow was a British
thermonuclear weapon
A thermonuclear weapon, fusion weapon or hydrogen bomb (H bomb) is a second-generation nuclear weapon design. Its greater sophistication affords it vastly greater destructive power than first-generation nuclear bombs, a more compact size, a lo ...
,
based on the US
W28
W, or w, is the twenty-third and fourth-to-last letter of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. It represents a consonant, but in some languages it ...
(then called Mark 28) design used in the B28 thermonuclear bomb and
AGM-28 Hound Dog missile. The US W28 had yields of
and while Red Snow yields are still classified, declassified British documents indicate the existence of "kiloton Red Snow" and "megaton Red Snow" variants of the weapon, suggesting similar yield options, while other sources have suggested a yield of approximately .
[
]
Development
The Red Snow warhead was developed after a September 1958 decision to adopt the US warhead for British use, following the 1958 US-UK Mutual Defence Agreement. It entered service in 1961, remaining in use until 1972, when it was replaced by the WE.177 bomb.[ Production numbers are classified, but it is believed that less than 150 weapons were produced.]Blue Steel missile
The Avro Blue Steel was a British air-launched, rocket-propelled nuclear armed standoff missile, built to arm the V bomber force. It allowed the bomber to launch the missile against its target while still outside the range of surface-to-air mi ...
.[Blue Steel Nuclear Missile Enters Service]
Atomic Weapons Establishment timeline, September 2007 In the gravity bomb role, it was fitted into the casing of the Yellow Sun weapon, even though the Red Snow warhead was considerably smaller than that of the original Yellow Sun bomb.
The Red Snow physics package was later reduced in size, weight and yield, and fitted with a smaller more modern primary, intended as a Red Beard
is a 1965 Japanese ''jidaigeki'' film co-written, edited, and directed by Akira Kurosawa, in his last collaboration with actor Toshiro Mifune. Based on Shūgorō Yamamoto's 1959 short story collection, '' Akahige Shinryōtan'', the film takes pl ...
replacement. Known as Una, this was later reduced in diameter and renamed Ulysses as the physics package intended for the UK warhead on the Skybolt
The Douglas GAM-87 Skybolt (AGM-48 under the 1962 Tri-service system) was an air-launched ballistic missile (ALBM) developed by the United States during the late 1950s. The basic concept was to allow US strategic bombers to launch their weapons ...
project.
Design
Red Snow used the primary stage Peter, an anglicised version of the US Python device used in the W28.[
The device was fitted inside weapon cases from the older Yellow Sun weapons. This may have been to simplify crew retraining, simplify integration of the new weapon to existing platforms, or to hide the radical reduction in weapon size.][
]
See also
* Atomic Weapons Establishment
* Rainbow Codes
The Rainbow Codes were a series of code names used to disguise the nature of various British military research projects. They were mainly used by the Ministry of Supply from the end of the Second World War until 1958, when the ministry was broke ...
References
{{Strategic nuclear weapon systems of the United Kingdom
Cold War weapons of the United Kingdom
Nuclear bombs of the United Kingdom
Military equipment introduced in the 1960s