Launch ofIUE on a Delta 2914 J-8 | |
| Function | Expendable launch system |
|---|---|
| Country of origin | United States |
| Size | |
| Height | 35 m (114 ft) |
| Diameter | 2.44 m (8 ft) |
| Mass | 130,392 kg (287,465 lb) |
| Payload to GTO (Geostationary transfer orbit) | |
| Mass | 724 kg |
| Launch history | |
| Status | Retired |
| Launch sites | Cape Canaveral,LC-17 Vandenberg,SLC-2W |
| Total launches | 44 |
| Success(es) | 43 |
| Failure | 1 |
| First flight | 19 January 1974 |
| Last flight | 6 October 1981 |
| Booster stage | |
| Powered by | 9 xCastor 2 |
| Maximum thrust | 258.915 kilonewtons (58,206 lbf) |
| Burn time | 37 seconds |
| Propellant | Solid |
| First stage | |
| Powered by | 1 xDelta-Thor RS-27 |
| Maximum thrust | 1,030.218 kilonewtons (231,602 lbf) |
| Burn time | 223 seconds |
| Propellant | RP-1/LOX |
| Second stage | |
| Powered by | 1 x Delta P |
| Maximum thrust | 41.923 kilonewtons (9,425 lbf) |
| Burn time | 322 seconds |
| Propellant | N2O4/Aerozine-50 |
| Third stage | |
| Powered by | 1 xBurner II |
| Maximum thrust | 43.551 kilonewtons (9,791 lbf) |
| Burn time | 42 seconds |
| Propellant | Solid |
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.
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