Delta IV Heavy Upgrade 87 t

American orbital launch vehicle. Proposed upgrade to Delta IV Heavy by clustering seven common booster modules, using a new RS-800K engine in the booster stages, and an AUS-60 27 metric ton thrust LOx/LH2 upper stage. Payload fairings over 6.5 m diameter could be accommodated. Introduction would require new launch pads and booster assembly infrastructure.

LEO Payload: 79,000 kg (174,000 lb) to a 407 km orbit at 28.50 degrees. Payload: 30,000 kg (66,000 lb) to a earth escape.