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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-v is typically provided by the thrust of a rocket engine, but can be created by other engines. The time-rate of change of delta-v is the magnitude of the acceleration caused by the engines, i.e., the thrust per total vehicle mass. The actual acceleration vector would be found by adding thrust per mass on to the gravity vector and the ...
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.
The U.S. Space Force and a Boeing-Lockheed joint venture sent a secret reconnaissance payload to orbit on Tuesday atop a Delta IV Heavy rocket, the last flight of a workhorse launch vehicle brand ...
Formed from the merger of Boeing's (NYSE: BA) and Lockheed Martin's (NYSE: LMT) competing rocket businesses at the end of 2006, United Launch Alliance (ULA) quickly moved to dominate the business ...
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Boeing reported in May 2016 that its test schedule would slip by eight months in order to reduce the mass of the spacecraft, address aerodynamics issues anticipated during launch and ascent on the Atlas V rocket, and meet new NASA-imposed software requirements. [49] The Orbital Flight Test was scheduled for spring 2019.
In March 2015, an Atlas V rocket carried NASA's Magnetospheric Multiscale Mission spacecraft, [108] [109] and a Delta IV rocket orbited the GPS IIF-9 satellite on behalf of the U.S. Air Force. [110] [111] The U.S. Air Force's X-37B spaceplane was carried by an Atlas V rocket in May 2015, [112] and a Delta IV orbited the WGS-7 satellite in July ...