Delta 4000

Source: Wikipedia, the free encyclopedia.
Delta 4000
Launch of a Delta 4925
FunctionLaunch vehicle
ManufacturerMcDonnell Douglas
Country of originUnited States
Cost per launchUS$34.22 million in 1985 (4925 variant)[1] (US$79.99 million in 2018)
Size
Height34 m (112 ft)
Diameter2.44 m (8 ft 0 in)
Mass200,740 kg (442,560 lb)
Stages2 or 3
Capacity
Payload to LEO
Mass3,400 kg (7,500 lb)
Payload to GTO
Mass1,200 kg (2,600 lb)
Associated rockets
Family
Castor 4A
No. boosters9
Height9.12 m (29.9 ft)
Diameter1.02 m (3 ft 4 in)
Empty mass1,529 kg (3,371 lb)
Gross mass11,743 kg (25,889 lb)
Powered bySolid
Maximum thrust478.3 kN (107,500 lbf)
Specific impulse
    • Sea level: 237 seconds
    • Vacuum: 266 seconds
Burn time56 s
First stage – Thor/Delta ELT
Height22.4 m (73 ft)
Diameter2.44 m (8 ft 0 in)
Empty mass4,059 kg (8,949 lb)
Gross mass84,067 kg (185,336 lb)
Powered by1 MB-3
Maximum thrust760.6 kN (171,000 lbf)
Specific impulse
    • Sea level: 250 seconds
    • Vacuum: 285 seconds
Burn time222 s
Propellant
Star 48B
Maximum thrust66 kN (15,000 lbf)
Specific impulse286 s
Burn time87 s

The Delta 4000 series was an American expendable launch system which was used to conduct two orbital launches in 1989 and 1990. It was a member of the Delta family of rockets. Although several variants were put forward, only the Delta 4925 was launched. The designations used a four digit numerical code to store information on the configuration of the rocket. It was built from a combination of spare parts left over from earlier Delta rockets, which were being retired, and parts from the Delta II 6000-series, which was just entering service.

The first stage was the

geosynchronous transfer orbit
.

Both Delta 4000 launches occurred from

Indian Space Research Organisation. Both were successful.[2][3][4]

References

  1. ^ "Delta 4000". Archived from the original on September 16, 2016. Retrieved September 8, 2018.
  2. ^ Wade, Mark. "Delta". Archived from the original on 2008-07-24.
  3. ^ Krebs, Gunter. "Thor Family". Gunter's Space Page. Archived from the original on 2007-08-06. Retrieved 2021-12-21.
  4. ^ "Delta 4000". Archived from the original on September 16, 2016. Retrieved September 8, 2018.