Lox/Kerosene propellant rocket stage. Loaded/empty mass 101,900/5,900 kg. Thrust 1,054.20 kN. Vacuum specific impulse 302 seconds.
Cost $ : 11.600 million.
AKA: Extra ELT Thor+.
Status: Study 1987.
Gross mass: 101,900 kg (224,600 lb).
Unfuelled mass: 5,900 kg (13,000 lb).
Height: 26.05 m (85.46 ft).
Diameter: 2.44 m (8.00 ft).
Span: 2.44 m (8.00 ft).
Thrust: 1,054.20 kN (236,992 lbf).
Specific impulse: 302 s.
Specific impulse sea level: 255 s.
Burn time: 265 s.
Number: 218 .
More...  Chronology...
Associated Countries
Associated Engines

RS27C Rocketdyne Lox/Kerosene rocket engine for Delta 7000. 1054.2 kN. Isp=302s. First flight 1990. More...
Associated Launch Vehicles

Barbarian MDD American heavylift orbital launch vehicle. Proposed launch vehicle for large SDI 'Star Wars' payloads. Expected to cost $ 400500 million, the Barbarian could place the ZenithStar chemical laser into low earth orbit. It would consist of 3 Shuttle SRM's, attached around a ring of six Delta RS27 first stage boosters, which in turn clustered around a single Delta first stage booster that was the last stage of the launch vehicle. More...

Delta 69208 American orbital launch vehicle. Three stage vehicle consisting of 9 x Castor 4A + 1 x EELT Thor/RS27+ 1 x Delta K with 2.4 m (8 foot) diameter fairing) More...

Delta 69258 American orbital launch vehicle. Four stage vehicle consisting of 9 x Castor 4A + 1 x EELT Thor/RS27+ 1 x Delta K + 1 x Star 48B with 2.4 m (8 foot) diameter fairing) More...

Delta 6920X Three stage vehicle consisting of 9 x Castor 4A + 1 x EELT Thor/RS27+ 1 x Delta K with 3.05 m (10 foot) diameter fairing More...

Delta 7925 American orbital launch vehicle. Four stage vehicle consisting of 9 x GEM40 + 1 x EELT Thor/RS27A + 1 x Delta K + 1 x Star 48B More...

Delta 79258 American orbital launch vehicle. Four stage vehicle consisting of 9 x GEM40 + 1 x EELT Thor/RS27A + 1 x Delta K + 1 x Star 48B with 2.4 m (8 foot) diameter fairing) More...

Delta 792510 American orbital launch vehicle. Four stage vehicle consisting of 9 x GEM40 + 1 x EELT Thor/RS27A + 1 x Delta K + 1 x Star 48B with 3.05 m (10 foot) diameter fairing More...

Delta 7920X Three stage vehicle consisting of 9 x GEM40 + 1 x EELT Thor/RS27A + 1 x Delta K with 3.05 m (10 foot) diameter fairing More...

Delta 7920X Three stage vehicle consisting of 9 x GEM40 + 1 x EELT Thor/RS27A + 1 x Delta K with 3.05 m (10 foot) diameter fairing More...

Delta 7920XC Three stage vehicle consisting of 9 x GEM40 + 1 x EELT Thor/RS27A + 1 x Delta K with 3.05 m (10 foot) diameter composite fairing More...

Delta 79208 American orbital launch vehicle. Three stage vehicle consisting of 9 x GEM40 + 1 x EELT Thor/RS27A + 1 x Delta K with 2.4 m (8 foot) diameter fairing) More...

Delta 79259.5 American orbital launch vehicle. Four stage vehicle consisting of 9 x GEM40 + 1 x EELT Thor/RS27A + 1 x Delta K + 1 x Star 48B with 2.9 m (9.5 foot) diameter fairing) More...

Delta 7420XC Three stage vehicle consisting of 4 x GEM40 + 1 x EELT Thor/RS27A + 1 x Delta K with 3.05 m (10 foot) diameter composite fairing More...

Delta 73269.5 American orbital launch vehicle. Four stage vehicle consisting of 3 x GEM40 + 1 x EELT Thor/RS27A + 1 x Delta K + 1 x Star 37FM with 2.9 m (9.5 foot) diameter fairing) More...

Delta 74259.5 American orbital launch vehicle. Four stage vehicle consisting of 4 x GEM40 + 1 x EELT Thor/RS27A + 1 x Delta K + 1 x Star 48B with 2.9 m (9.5 foot) diameter fairing) More...

Delta 74269.5 American orbital launch vehicle. Four stage vehicle consisting of 4 x GEM40 + 1 x EELT Thor/RS27A + 1 x Delta K + 1 x Star 37FM with 2.9 m (9.5 foot) diameter fairing) More...

Delta 732010 American orbital launch vehicle. Three stage vehicle consisting of 3 x GEM40 + 1 x EELT Thor/RS27A + 1 x Delta K More...

Delta 742510 American orbital launch vehicle. Four stage vehicle consisting of 4 x GEM40 + 1 x EELT Thor/RS27A + 1 x Delta K + 1 x Star 48B with 3.05 m (10 foot) diameter fairing More...

Delta 792010L American orbital launch vehicle. Three stage vehicle consisting of 9 x GEM40 + 1 x EELT Thor/RS27A + 1 x Delta K with 3.05 m (10 foot) diameter long fairing More...

Delta 7920H American orbital launch vehicle. Version of Delta 7000 using much larger GEM 46 solid rocket motors originally developed for the Delta 3. More...

Delta 7925H American orbital launch vehicle. Four stage vehicle consisting of 9 x GEM46 + 1 x EELT Thor/RS27A + 1 x Delta K + 1 x Star 48B More...
Associated Propellants

Lox/Kerosene Liquid oxygen was the earliest, cheapest, safest, and eventually the preferred oxidiser for large space launchers. Its main drawback is that it is moderately cryogenic, and therefore not suitable for military uses where storage of the fuelled missile and quick launch are required. In January 1953 Rocketdyne commenced the REAP program to develop a number of improvements to the engines being developed for the Navaho and Atlas missiles. Among these was development of a special grade of kerosene suitable for rocket engines. Prior to that any number of rocket propellants derived from petroleum had been used. Goddard had begun with gasoline, and there were experimental engines powered by kerosene, diesel oil, paint thinner, or jet fuel kerosene JP4 or JP5. The wide variance in physical properties among fuels of the same class led to the identification of narrowrange petroleum fractions, embodied in 1954 in the standard US kerosene rocket fuel RP1, covered by Military Specification MILR25576. In Russia, similar specifications were developed for kerosene under the specifications T1 and RG1. The Russians also developed a compound of unknown formulation in the 1980's known as 'Sintin', or synthetic kerosene. More...
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