Delta IV Heavy: Difference between revisions
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The '''Delta IV Heavy''' (Delta 9250H) is an expendable rocket, the largest type of the [[Delta IV]] family. It was first launched in 2004.<ref>[http://www.boeing.com/news/releases/2004/q4/nr_041222m.html "Boeing Delta IV Heavy Achieves Major Test Objectives in First Flight"], Boeing, 2004, accessed March 22, 2012</ref> |
The '''Delta IV Heavy''' (Delta 9250H) is an expendable rocket, the largest type of the [[Delta IV]] family. It was first launched in 2004.<ref>[http://www.boeing.com/news/releases/2004/q4/nr_041222m.html "Boeing Delta IV Heavy Achieves Major Test Objectives in First Flight"], Boeing, 2004, accessed March 22, 2012</ref> |
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It is similar to the Medium+ (5,2), except that it uses two additional [[ |
It is similar to the Medium+ (5,2), except that it uses two additional [[common booster core]]s instead of using [graphite-epoxy motor]]s. These are strap-on boosters which are separated earlier in the flight than the center common booster core. The Delta IV Heavy also features a stretched 5-meter composite payload fairing.<ref name="Growth"> |
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{{Cite web|url=http://www.boeing.com/defense-space/space/delta/kits/d310_d4heavy_demo.pdf |title=Delta Launch 310{{spaced ndash}}Delta IV Heavy Demo Media Kit - Delta Growth Options |publisher=Boeing}}</ref> An aluminum trisector (3 part) fairing derived from the [[Titan IV]] fairing is also available.<ref>[http://www.afspc.af.mil/library/factsheets/factsheet.asp?id=3643 US Air Force - EELV Fact Sheets]</ref> The first launch in 2004 was a test launch only. Its first payload was the DSP-23 satellite. |
{{Cite web|url=http://www.boeing.com/defense-space/space/delta/kits/d310_d4heavy_demo.pdf |title=Delta Launch 310{{spaced ndash}}Delta IV Heavy Demo Media Kit - Delta Growth Options |publisher=Boeing}}</ref> An aluminum trisector (3 part) fairing derived from the [[Titan IV]] fairing is also available.<ref>[http://www.afspc.af.mil/library/factsheets/factsheet.asp?id=3643 US Air Force - EELV Fact Sheets]</ref> The first launch in 2004 was a test launch only. Its first payload was the DSP-23 satellite. |
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Revision as of 12:57, 30 September 2013
The Delta IV Heavy (Delta 9250H) is an expendable rocket, the largest type of the Delta IV family. It was first launched in 2004.[1]
It is similar to the Medium+ (5,2), except that it uses two additional common booster cores instead of using [graphite-epoxy motor]]s. These are strap-on boosters which are separated earlier in the flight than the center common booster core. The Delta IV Heavy also features a stretched 5-meter composite payload fairing.[2] An aluminum trisector (3 part) fairing derived from the Titan IV fairing is also available.[3] The first launch in 2004 was a test launch only. Its first payload was the DSP-23 satellite.
Capacity (separated spacecraft mass) of the Delta IV Heavy:
- Low Earth orbit (LEO) 22,950 kg [4]
- geosynchronous transfer orbit (GTO) 13,130 kg (28,950 lb).[4]
- geosynchronous orbit (GEO) 6,275 kg[citation needed]
- escape orbit 9,306 kg[citation needed]
- C3 performance of 30 km2s−2: 5,228 kg[citation needed]
- C3 performance of 60 km2s−2: 2,521 kg
The Heavy's total mass at launch is approximately 733,000 kg, much less than that of the Space Shuttle (2,040,000 kg), but is not reused.
The Orion Multi-Purpose Crew Vehicle is planned for an unmanned test flight launch, known as EFT-1, aboard a Delta IV Heavy rocket in 2014.[5] If launched, it would be its first launch into orbit.
Comparable Vehicles
References
- ^ "Boeing Delta IV Heavy Achieves Major Test Objectives in First Flight", Boeing, 2004, accessed March 22, 2012
- ^ "Delta Launch 310 – Delta IV Heavy Demo Media Kit - Delta Growth Options" (PDF). Boeing.
- ^ US Air Force - EELV Fact Sheets
- ^ a b "Delta IV Payload Planners Guide" (PDF). United Launch Alliance. September 2007. pp. 2–5.
- ^ Bergin, Chris (2012-01-18). "EFT-1 set to receive Spring, 2014 launch date after contract negotiations". NASASpaceFlight.com. Retrieved 21 July 2012.