5 m diameter payload fairing.

LEO Payload: 25,800 kg. to: 185 km Orbit. at: 28.5 degrees. Payload: 10,843 kg. to a: Geosynchronous transfer, 27deg inclination trajectory. Liftoff Thrust: 884,000 kgf. Total Mass: 733,400 kg. Core Diameter: 5.0 m. Total Length: 70.7 m. Development Cost $: 500.00 million. in 2002 average dollars. Launch Price $: 170.00 million. in 1999 price dollars. Cost comments: Development cost is USAF portion only in cost-sharing arrangement for all Delta IV models. These funds were accompanied by an order for 19 Delta IV launches at a total price of $ 1.38 billion.

• Stage Number: 0. 2 x Delta RS-68 Gross Mass: 226,400 kg. Empty Mass: 26,760 kg. Thrust (vac): 337,807 kgf. Isp: 420 sec. Burn time: 249 sec. Isp(sl): 365 sec. Diameter: 5.1 m. Span: 5.1 m. Length: 40.8 m. Propellants: Lox/LH2 No Engines: 1. RS-68

• Stage Number: 1. 1 x Delta RS-68 Gross Mass: 226,400 kg. Empty Mass: 26,760 kg. Thrust (vac): 337,807 kgf. Isp: 420 sec. Burn time: 249 sec. Isp(sl): 365 sec. Diameter: 5.1 m. Span: 5.1 m. Length: 40.8 m. Propellants: Lox/LH2 No Engines: 1. RS-68

• Stage Number: 2. 1 x Delta 4H - 2 Gross Mass: 30,710 kg. Empty Mass: 3,490 kg. Thrust (vac): 11,222 kgf. Isp: 462 sec. Burn time: 1,125 sec. Diameter: 2.4 m. Span: 5.0 m. Length: 12.0 m. Propellants: Lox/LH2 No Engines: 1. RL-10B-2

• 455 - Isakowitz, Steven J,, International Reference to Space Launch Systems Third Edition, AIAA, Washington DC, 2000.