description Delta IV Medium+ (5,2) Overview
The Delta IV Medium+ (5,2) is an expendable launch vehicle variant operated by the United Launch Alliance (ULA) designed for medium-lift orbital missions. Its specific configuration includes a 5-meter diameter payload fairing and two GEM-60 solid rocket boosters strapped to a Common Booster Core powered by an RS-68 engine. The rocket was successfully used to deliver various United States government payloads to space before the Medium family was retired.
help Delta IV Medium+ (5,2) FAQ
What does the 5,2 designation mean on Delta IV Medium+ (5,2)?
The 5 refers to the vehicle's 5-meter payload fairing, while the 2 refers to two GEM-60 solid rocket boosters. The variant also uses a Delta common booster core and a cryogenic upper stage.
Who operated the Delta IV Medium+ (5,2)?
The rocket was operated by United Launch Alliance, or ULA. ULA developed the Delta IV family for medium and heavy orbital missions before the company's transition toward Vulcan.
How is Delta IV Medium+ (5,2) different from Medium+ (5,4)?
The Medium+ (5,2) uses two GEM-60 strap-on boosters, while the Medium+ (5,4) uses four. The four-booster version therefore provides more lift capability but is a different configuration.
Why does the Delta IV Medium+ (5,2) use a 5-meter fairing?
The 5-meter fairing gives the payload more usable diameter than the smaller Delta IV fairings. It was intended for larger spacecraft while retaining the single-core Medium+ architecture.
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