PGM-17 Thor

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SM-75/PGM-17A Thor
TypeIntermediate Range Ballistic Missile (IRBM)
Place of originUnited States
Service history
Used byUnited States Air Force (testing)
Royal Air Force (operational deployment)
Production history
ManufacturerDouglas Aircraft Company
No. builtAbout 225; peak deployment was 60
VariantsDelta rockets
Thor rocket family
Mass49,590 kilograms (109,330 lb) at launch.
Length19.76 metres (64 ft 10 in).
Diameter2.4 metres (8 ft).

The PGM-17A Thor was the first operational ballistic missile of the United States Air Force (USAF).