This article is about the rocket designated Delta 4000 under the old designation system. For the new system, see Delta IV.
Delta 4000
Launch of a Delta 4925
Function
Launch vehicle
Manufacturer
McDonnell Douglas
Country of origin
United States
Cost per launch
US$34.22 million in 1985 (4925 variant)[1] (US$79.99 million in 2018)
Size
Height
34 m (112 ft)
Diameter
2.44 m (8 ft 0 in)
Mass
200,740 kg (442,560 lb)
Stages
2 or 3
Capacity
Payload to LEO
Mass
3,400 kg (7,500 lb)
Payload to GTO
Mass
1,200 kg (2,600 lb)
Associated rockets
Family
Delta
Comparable
Delta 5000, Delta II
Launch history
Status
Retired
Launch sites
Cape Canaveral SLC-17 Vandenberg AFB SLC-2W
Total launches
2
Success(es)
2
First flight
28 August 1989
Last flight
12 June 1990
Boosters – Castor 4A
No. boosters
9
Height
9.12 m (29.9 ft)
Diameter
1.02 m (3 ft 4 in)
Empty mass
1,529 kg (3,371 lb)
Gross mass
11,743 kg (25,889 lb)
Powered by
Solid
Maximum thrust
478.3 kN (107,500 lbf)
Specific impulse
Sea level: 237 seconds
Vacuum: 266 seconds
Burn time
56 s
First stage – Thor/Delta ELT
Height
22.4 m (73 ft)
Diameter
2.44 m (8 ft 0 in)
Empty mass
4,059 kg (8,949 lb)
Gross mass
84,067 kg (185,336 lb)
Powered by
1 MB-3
Maximum thrust
760.6 kN (171,000 lbf)
Specific impulse
Sea level: 250 seconds
Vacuum: 285 seconds
Burn time
222 s
Propellant
LOX / RP-1
Second stage – Delta K
Height
5.89 m (19.3 ft)
Diameter
2.44 m (8 ft 0 in)
Empty mass
950 kg (2,090 lb)
Gross mass
6,954 kg (15,331 lb)
Powered by
1 AJ10-118K
Maximum thrust
43.6 kN (9,800 lbf)
Specific impulse
319 s
Burn time
431 s
Propellant
N2O4 /Aerozine 50
Third stage – PAM-D (optional)
Height
2.03 m (6 ft 8 in)
Diameter
1.25 m (4 ft 1 in)
Empty mass
128 kg (282 lb)
Gross mass
2,137 kg (4,711 lb)
Powered by
Star 48B
Maximum thrust
66 kN (15,000 lbf)
Specific impulse
286 s
Burn time
87 s
[edit on Wikidata]
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 MB-3-III powered Extended Long Tank Thor, previously flown on the 1000-series. Nine Castor-4A solid rocket boosters were attached to increase thrust at lift-off, replacing the less powerful Castor-4 boosters used on the 3000 series. The Delta-K was used as a second stage. A Star-48B PAM-D was used as a third stage, to boost payloads into geosynchronous transfer orbit.
Both Delta 4000 launches occurred from Launch Complex 17B at Cape Canaveral. The first launched Marco Polo 1 for BSkyB, and the second launched INSAT 1D for the Indian Space Research Organisation. Both were successful.[2][3][4]
^"Delta 4000". Archived from the original on September 16, 2016. Retrieved September 8, 2018.
^Wade, Mark. "Delta". Archived from the original on 2008-07-24.
^Krebs, Gunter. "Thor Family". Gunter's Space Page. Archived from the original on 2007-08-06. Retrieved 2021-12-21.
^"Delta 4000". Archived from the original on September 16, 2016. Retrieved September 8, 2018.
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