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The Delta IV Medium (Delta 9040) was the most basic Delta IV. It featured a single CBC and a modified Delta III second stage, with 4-meter liquid hydrogen and liquid oxygen tanks (called a Delta Cryogenic Second Stage (DCSS)) and a 4-meter payload fairing. The Delta IV Medium was capable of launching 4,200 kg to geostationary transfer orbit ...
Delta IV Medium, coded Delta 9040, was the most basic Delta IV. It featured a single CBC and a modified Delta 3 second stage, with 4-meter liquid hydrogen and liquid oxygen tanks (called a Delta Cryogenic Second Stage (DCSS)) and a 4-meter payload fairing. The Delta IV Medium was capable of launching 4,200 kg to geostationary transfer orbit ...
Delta IV was a group of five expendable launch systems in the Delta rocket family introduced in the early 2000s. Originally designed by Boeing 's Defense, Space and Security division for the Evolved Expendable Launch Vehicle (EELV) program, the Delta IV became a United Launch Alliance (ULA) product in 2006.
The Delta IV Heavy (Delta 9250H) was an expendable heavy-lift launch vehicle, the largest type of the Delta IV family. It had the highest capacity of any operational launch vehicle in the world after the retirement of the Space Shuttle in 2011 until the Falcon Heavy debuted in 2018, and it was the world's third highest-capacity launch vehicle ...
The Delta Cryogenic Second Stage (DCSS) is a family of cryogenic-fuelled rocket stages used on the Delta III, Delta IV, and on the Space Launch System Block 1 launch vehicles. The DCSS employs a unique two-tank architecture where the cylindrical liquid hydrogen (LH 2 ) tank carries payload launch loads and forms the upper section.
As of October 2018, only the Delta IV remains in production. Single-stick versions of Delta IV was retired by United Launch Alliance (ULA) in 2019 and replaced by the ULA Atlas V, leaving the Delta IV Heavy the only remaining operational member of the Delta family, flying US national security missions.
Delta IV CBCs and DCSSs were integrated horizontally before being transported to the launchpad. The Delta IV Medium retired after the 22 August 2019 launch of a GPS-III satellite. The mission used a Delta IV M+(4,2) two SRBs, and a 4 m diameter DCSS and payload fairing, the final use of the 4 m fairing. [33] [34]
Delta IV-M CCAFS SLC-37B USA-167 (DSCS-3 A3) Classified GTO: US Air Force: Success [21] Military communications satellite, First Delta IV Medium launch, First USAF EELV mission 297 March 31, 2003 22:09 Delta II 7925-9.5 CCAFS SLC-17A USA-168 2,032 kg MEO: US Air Force: Success [22] Navigation satellite 298 June 10, 2003 17:58 Delta II 7925-9.5