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Delta 2000

From Wikipedia, the free encyclopedia
Series of American expendable launch systems
This article is about the rocket designated Delta 2000 under the old designation system. For the new system, seeDelta II.
Delta 2000 series
Launch ofIUE on a Delta 2914 J-8
FunctionExpendable launch system
Country of originUnited States
Size
Height35 m (114 ft)
Diameter2.44 m (8 ft)
Mass130,392 kg (287,465 lb)
Payload to GTO (Geostationary transfer orbit)
Mass724 kg
Launch history
StatusRetired
Launch sitesCape Canaveral,LC-17
Vandenberg,SLC-2W
Total launches44
Success(es)43
Failure1
First flight19 January 1974
Last flight6 October 1981
Booster stage
Powered by9 xCastor 2
Maximum thrust258.915 kilonewtons (58,206 lbf)
Burn time37 seconds
PropellantSolid
First stage
Powered by1 xDelta-Thor RS-27
Maximum thrust1,030.218 kilonewtons (231,602 lbf)
Burn time223 seconds
PropellantRP-1/LOX
Second stage
Powered by1 x Delta P
Maximum thrust41.923 kilonewtons (9,425 lbf)
Burn time322 seconds
PropellantN2O4/Aerozine-50
Third stage
Powered by1 xBurner II
Maximum thrust43.551 kilonewtons (9,791 lbf)
Burn time42 seconds
PropellantSolid

TheDelta 2000 series was an Americanexpendable launch system which was used to conduct forty-fourorbital launches between 1974 and 1981. It was a member of theDelta family of rockets, sometimes called Thorad Delta. Several variants existed, which were differentiated by afour digit numerical code. The Delta 1000, 2000 and 3000 series used surplus NASAApollo program rockets engines for its first and second stages.

The first stage was anExtended Long Tank Thor, re-engined with theRocketdyneRS-27 replacing the earlierMB-3-III engine. The RS-27 engine was a rebrandedH-1 engine used in theSaturn 1B with minor changes. Three or nineCastor-2solid rocket boosters were attached to increase thrust at lift-off. TheDelta-P second stage used the TRWTR-201 engine. The TR-201 engine was aLunar Module Descent Engine reconfigured for fixed thrust output. Launches which required a three-stage configuration in order to reach higher orbits used the ThiokolStar-37D orStar-37E upper stage as an apogee kick motor.

Delta 2000 launches occurred fromSpace Launch Complex 2W atVandenberg AFB and both pads ofLaunch Complex 17 atCape Canaveral. Forty-three out of forty-four launches were successful. The single failure being the maiden flight, 19 January 1974, which placedSkynet 2A into a useless orbit. A short circuit in an electronics package circuit board (on second stage) left the upper stages and satellite in an unstable low orbit (96 x 3,406 km x 37.6°) that rapidly decayed. An investigation revealed that a substandard coating had been used on the circuit board.[1]

The cost of each launch was estimated on average at $28.52 million, depending on the combination of carrier rocket.

References

[edit]
  1. ^Kyle, Ed (9 April 2010)."Delta 2000 series - Extended Long Tank Delta". Space Launch Report. Retrieved7 June 2012.
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