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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.[1][2] It was manufactured by United Launch Alliance and was first launched in December 2004 and was retired after its last flight on 9th April 2024.[3]
- ^ "Mission Status Center". Spaceflight Now. Retrieved 26 July 2014.
The ULA Delta 4-Heavy is currently the world's largest rocket, providing the nation with reliable, proven, heavy lift capability for our country's national security payloads from both the east and west coasts.
- ^ Chang, Kenneth (6 February 2018). "Falcon Heavy, SpaceX's Big New Rocket, Succeeds in Its First Test Launch". The New York Times. Retrieved 6 February 2018.
The Falcon Heavy is capable of lifting 140,000 pounds to low-Earth orbit, more than any other rocket today.
- ^ "Boeing Delta IV Heavy Achieves Major Test Objectives in First Flight" Archived 19 April 2012 at the Wayback Machine Boeing, 2004, accessed 22 March 2012