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WE.177

The WE.177, originally styled as WE 177, and sometimes simply as WE177, was a series of tactical and strategic nuclear weapons with which the Royal Navy and the Royal Air Force were equipped. It was the primary air-dropped nuclear weapon in the... Wikipedia
Blast yield: WE.177A: 0.5 kilotons or 10 kilotons; WE.177B: 450 kilotons; WE.177C: 200 kilotons
In service: September 1966–1998
Mass: WE.177A: 272 kilograms (600 lb), WE.177B and WE.177C: 457 kilograms (1,010 lb),