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The Delta rocket family was a versatile range of American rocket-powered expendable launch systems that provided space launch capability in the United States from 1960 to 2024. Japan also launched license-built derivatives (N-I, N-II, and H-I) from 1975 to 1992. More than 300 Delta rockets were launched with a 95% success rate.
Delta II A Delta II launch vehicle launches from Cape Canaveral carrying the Dawn spacecraft. Function Launch vehicle Manufacturer United Launch Alliance Country of origin United States Cost per launch US$51 million in 1987 (7920-10 model) US$137 million in 2018 before retirement Size Height 38.9 m (128 ft) Diameter 2.44 m (8 ft 0 in) Mass 152,000–286,000 kg (335,000–631,000 lb) Stages 2 ...
Delta IV was a group of five expendable launch systems in the Delta rocket family. It flew 45 missions from 2002 to 2024. 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.
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.
Delta III was an expendable launch vehicle made by McDonnell Douglas (later acquired by Boeing).Development was canceled before the vehicle became operational. The vehicle is the third generation of the Delta rocket family, developed from the highly successful Delta II to help meet the launch demand of larger satellites.
The Delta IV Heavy (Delta 9250H) was an expendable heavy-lift launch vehicle. When it was in service from 2004 to 2024, it was the largest type in the Delta IV family and was the world's second highest-capacity rocket in operation, behind SpaceX 's Falcon Heavy rocket and closely followed by CNSA's Long March 5 rocket.
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.
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.