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Delta IV  
Initial Operational Capability (IOC): 2002
Total Production: 4
Unitary Cost: USD$73 million
Also Known As: EELV and Evolved Expendable Launch Vehicle
Origin: United States of America
Corporations: Boeing
Parent System: Delta
Initial Operational Capability (IOC): 1960
Total Production: 304
Family Members: Delta II and Delta III
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Description: The Delta expendable launch vehicle program started in 1959 to meet the requirements of NASA. The Delta I launch vehicle propulsion system took its first stage from the USAF's Thor Intermediate Range Ballistic Missile (IRBM) and the second stage from the US Navy's Vanguard ballistic missile. In 1960 the first Delta I vehicle was capable of delivery a 100-pound payload into the GTO (Geosynchronous Transfer Orbit). The Delta IV launch vehicles have been designed to launch virtually any medium or heavy-sized commercial or military payload into space. The launch vehicle comprises five different models tailored to meet a wide range of payload and launch profiles requirements (4 models intended for medium and 1 for heavyweight payloads).

The Delta IV along with Lockheed-Martin Atlas V were selected by the US Air Force for the Evolved Expendable Launch Vehicle (EELV) program. The launch vehicle propulsion system consists of the RS-68 motor for the first stage and the RL10B-2 introduced by the Delta III for the second stage. In addition, ATK developed the GEM 60 boosters to be added according to launch needs. The Delta IV can carry a 50,800 lb (23,040 kg) payload to a low earth orbit (LEO), or a 28,950 lb (13,130 kg) payload to GTO. Currently (as of 2004), the US Air Force EELV program comprising the Delta IV and Atlas V launch vehicles is valued at $31.79 billion.

The Boeing Delta IV Heavy variant made its first flight from Cape Canaveral Air Force Station, Florida, on December 22, 2004, placing a demonstration satellite in a lower orbit, which was lower than planned. The first flight lasted 5-hour and 50-minute. Preliminary data indicated that a shorter than expected first-stage burn led to the low orbit. The Delta IV Heavy rocket will undergo modifications to be ready for service deploying most important national security payloads from 2005. The first West Coast Launch of Boeing's Delta IV EELV was conducted at Vandenberg Air Force Base, California, on 27 June 2006. The Delta IV launch system put into orbit a National Reconnaissance Office (NRO) payload.

Delta IV Specifications

Crew: 0
Number of Stages: 2
Dimensions
Height: 72 meter (2,823 inch)
Weight
Max Lift-off Thrust: 1,986,000 pound (901 ton)
Payload to GTO: 13,130 kilogram (28,946 pound)
Payload to LEO: 23,040 kilogram (50,794 pound)
CEP: Circular Error Probable
Meters (m)   Kilometers (km)   Nautic Miles (nm)   Inch (in)   Yard (yd)   Foot (ft)   Millimeter (mm)
Pound (lb)   Kilogram (kg)   kN (KiloNewton)   Ton (t)
Meters per Second (mps)   Kilometers per Hour (kph)   Knot (kt)   Miles per Hour (mph)
Liter (l)   Galon (gl)
Year (yr)   Minutes (min)   Second (sec)
Shaft-Horse-Power (shp)

Delta IV News

There are 8 news between
1 Dec 2006 and 7 Dec 2016
Wednesday, December 7, 2016United States WGS-8 Satellite Nearly Doubles Bandwidth for Military Users
Friday, December 5, 2014NASA Carries Out First Launch of Orion Aboard Delta IV Rocket Successfully
Wednesday, April 30, 2014Orion Undergoes Simulation of Intense Launch Vibrations
Tuesday, May 1, 2012First Launch Successful Under RSA IIA Mission Flight Control Center
Friday, January 21, 2011First Delta IV Heavy Launches from Vandenberg AFB
Friday, May 28, 2010First GPS IIF Satellite Sends First Signals from Space
Sunday, November 11, 2007US Air Force Delta IV Rocket Launches Final DSP Satellite
Friday, December 1, 2006United Launch Alliance, LLC Joint Venture Launched

Operators & Related Equipment


OperatorsItems

Grand Total ?1
Propulsion Systems
GEM 60
Space Systems
Orionx1
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