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Orbital launch vehicle. Year: 2001. Family: Delta. Country: USA. Status: In production. Light launch vehicle using the Delta-4 core with the traditional Delta K and PAM-D upper stages. 2 m diameter payload fairing. Manufacturer: Douglas. Payload: 2,200 kg (4,800 lb). to a: Geosynchronous transfer trajectory. Liftoff Thrust: 2,949.000 kN (662,961 lbf). Total Mass: 244,046 kg (538,029 lb). Core Diameter: 5.00 m (16.40 ft). Total Length: 59.00 m (193.00 ft). Cost comments: The originally estimated launch price in 1999 was $95 million. Due to the collapse of the commercial launch market, this was revised by the USAF in November 2004 to $ 138, $192, and $ 254 million respectively.
Stage Data - Delta IV Small - Stage Number: 1. 1 x Stage: Delta RS-68. Gross Mass: 226,400 kg (499,100 lb). Empty Mass: 26,760 kg (58,990 lb). Thrust (vac): 3,312.755 kN (744,737 lbf). Isp: 420 sec. Burn time: 249 sec. Isp(sl): 365 sec. Diameter: 5.10 m (16.70 ft). Span: 5.10 m (16.70 ft). Length: 40.80 m (133.80 ft). Propellants: Lox/LH2. No Engines: 1. Engine: RS-68. Status: In production. Low cost expendable stage using lower performance engine. Used in Delta 4, Boeing EELV. Engine can be throttled to 60%.
- Stage Number: 2. 1 x Stage: Delta K. Gross Mass: 6,954 kg (15,330 lb). Empty Mass: 950 kg (2,090 lb). Thrust (vac): 43.630 kN (9,808 lbf). Isp: 319 sec. Burn time: 431 sec. Diameter: 1.70 m (5.50 ft). Span: 2.40 m (7.80 ft). Length: 5.89 m (19.32 ft). Propellants: N2O4/Aerozine-50. No Engines: 1. Engine: AJ10-118K.
- Stage Number: 3. 1 x Stage: PAM-D. Gross Mass: 2,141 kg (4,720 lb). Empty Mass: 232 kg (511 lb). Thrust (vac): 67.155 kN (15,097 lbf). Isp: 292 sec. Burn time: 88 sec. Isp(sl): 0 sec. Diameter: 1.24 m (4.06 ft). Span: 1.24 m (4.06 ft). Length: 2.04 m (6.69 ft). Propellants: Solid. No Engines: 1. Engine: Star 48. Other designations: TE-M-711-18.
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