To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.

From Wikipedia, the free encyclopedia

Delta 4000
Delta 4925.jpg
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)
Height34 m (112 ft)
Diameter2.44 m (8 ft 0 in)
Mass200,740 kg (442,560 lb)
Stages2 or 3
Payload to LEO
Mass3,400 kg (7,500 lb)
Payload to GTO
Mass1,200 kg (2,600 lb)
Associated rockets
ComparableDelta 5000, Delta II
Launch history
Launch sitesCape Canaveral SLC-17
Vandenberg AFB SLC-2W
Total launches2
First flight28 August 1989
Last flight12 June 1990
Boosters – Castor 4A
No. boosters9
Length9.12 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)
Thrust478.3 kN (107,500 lbf)
Specific impulse
    • Sea level: 237 seconds
    • Vacuum: 266 seconds
Burn time56 s
First stage – Thor/Delta ELT
Length22.4 m (73 ft)
Diameter2.44 m (8 ft 0 in)
Empty mass4,059 kg (8,949 lb)
Gross mass84,067 kg (185,336 lb)
Engines1 MB-3
Thrust760.6 kN (171,000 lbf)
Specific impulse
    • Sea level: 250 seconds
    • Vacuum: 285 seconds
Burn time222 s
FuelLOX / RP-1
Second stage – Delta K
Length5.89 m (19.3 ft)
Diameter2.44 m (8 ft 0 in)
Empty mass950 kg (2,090 lb)
Gross mass6,954 kg (15,331 lb)
Engines1 AJ10-118K
Thrust43.6 kN (9,800 lbf)
Specific impulse319 s
Burn time431 s
/Aerozine 50
Third stage – PAM-D (optional)
Length2.03 m (6 ft 8 in)
Diameter1.25 m (4 ft 1 in)
Empty mass128 kg (282 lb)
Gross mass2,137 kg (4,711 lb)
MotorStar 48B
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 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.

YouTube Encyclopedic

  • 1/5
    43 635
    61 684
    1 437
    58 045
  • Delta III - The Cursed Child Of Delta Rockets.
  • How Solid Rockets Steer - How Can You Stop A SRB?
  • 2 liter water rocket launch with fins captured at 4,000 FPS
  • Parker Solar Probe 🔴 Live Launch Commentary | ULA Delta IV Heavy
  • Incidents & Accidents Involving Launch Escape Systems



  1. ^ "Delta 4000". Retrieved September 8, 2018.
This page was last edited on 29 December 2020, at 21:01
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.