The Rocketdyne S-3D is an American

liquid rocket engine A liquid-propellant rocket or liquid rocket utilizes a rocket engine that uses liquid propellants. Liquids are desirable because they have a reasonably high density and high specific impulse (''I''sp). This allows the volume of the propellant ta ...

produced by

Rocketdyne Rocketdyne was an American rocket engine design and production company headquartered in Canoga Park, California, Canoga Park, in the western San Fernando Valley of suburban Los Angeles, California, Los Angeles, in southern California. The Rocke ...

between 1956 and 1961 for use on the

PGM-19 Jupiter The PGM-19 Jupiter was the first nuclear armed, medium-range ballistic missile (MRBM) of the United States Air Force (USAF). It was a liquid-propellant rocket using RP-1 fuel and LOX oxidizer, with a single Rocketdyne LR79-NA (model S-3D) roc ...

and

PGM-17 Thor The PGM-17A Thor was the first operational ballistic missile of the United States Air Force (USAF). Named after the Norse god of thunder, it was deployed in the United Kingdom between 1959 and September 1963 as an intermediate-range ballistic m ...

missiles, and the Juno II rocket. Its design was used later as the basis for the H-1 rocket engine of the

Saturn I The Saturn I was a rocket designed as the United States' first medium lift launch vehicle for up to low Earth orbit payloads.Terminology has changed since the 1960s; back then, 20,000 pounds was considered "heavy lift". The rocket's first stag ...

, and the

Rolls-Royce RZ.2 The RZ.2 was a British design for a liquid oxygen (LOX) / kerosene-fuelled rocket engine to power the Blue Streak (missile). The design was a development of the Rolls-Royce RZ.1 rocket engine, which had in turn been a development by Rolls-Roy ...

of the

Blue Streak Blue Streak or Bluestreak may refer to: Entertainment * ''Blue Streak'' (album), a 1995 album by American blues guitarist Luther Allison * Blue Streak (comics), a secret identity used by three separate Marvel Comics supervillains * Bluestreak (co ...

. It belongs to the LR79 engine family.Article title
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References

{{Rocket engines S-3D Rocket engines of the United States Rocket engines using the gas-generator cycle