An intermediate-range ballistic missile (IRBM) is a ballistic missile with a range between 3,000 to 5,500 km (1,864 to 3,418 miles), categorized between a medium-range ballistic missile (MRBM) and an intercontinental ballistic missile (ICBM). [1] Classifying ballistic missiles by range is done mostly for convenience.

The PGM-17A Thor was the first operative ballistic missile of the United States Air Force (USAF). It was named after the Norse god of thunder. It was deployed in the United Kingdom between 1959 and September 1963 as an intermediate-range ballistic missile (IRBM) with …

The de Havilland Propellers Blue Streak was a British Intermediate-range ballistic missile (IRBM), and later the first stage of the Europa satellite launch vehicle. Blue Streak was cancelled without entering full production.

In 1955 Britain began developing a long-range liquid-fueled missile, the Blue Streak. Although initial concepts included aninter-continental range missile [ICBM], work soon focused on an intermediate range missile [IRBM].

In 1955 the U.S.A.F. decided to build an intermediate-range ballistic missile (IRBM) to be in service as quickly as possible. Douglas Aircraft was made the prime contractor for the system – the SM-75 – which became the Thor.

An Intermediate Range Ballistic Missile (IRBM) has a range up to 1500 nautical miles. This term was applicable to the Thor and Jupiter, both of them US Air Force...

In 1955, Britain began developing a long-range liquid-fueled missile, the Blue Streak. Although initial concepts included an inter-continental range missile [ICBM], work soon focused on an...

Thor was deployed to the UK starting in August 1958, operated by twenty squadrons of Royal Air Force Bomber Command. The first active unit was No.77 Squadron RAF at RAF Feltwell in 1958, with the remaining units becoming active in 1959. All were deactivated by September 1963.

2008年1月2日 · This article looks at the shifting intricacies of British assessments of the Soviet IRBM threat to the United Kingdom during the 1950s. Based on JIC, Cabinet and Air Ministry records of the period, as well as political memoirs, it looks at the assessments in parallel with the development of the British Blue Streak nuclear ballistic missile ...

One of the principal issues for discussion was the possibility of deploying the Thor Intermediate Range Ballistic Missile to Britain. It was agreed that 60 Thor IRBM would be manned up by RAF Bomber Command but that control of the nuclear warheads would remain with USAF personnel sited at each Thor base.