Delta IV Heavy Upgrade 35 t

American orbital launch vehicle. Proposed upgrade to Delta IV Heavy by adding RS-68B upgraded engines to the core vehicles and an AUS-60 upper stage powered by 2 MB-45 or RL-45 20 metric ton thrust LOx/LH2 engines. 6.5 m diameter payload fairing. Introduction would require modifications to existing launch pads.

LEO Payload: 32,000 kg (70,000 lb) to a 407 km orbit at 28.50 degrees. Payload: 12,500 kg (27,500 lb) to a earth escape.