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Delta IV Small

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Status: In production. Payload: 2,200 kg (4,800 lb). Thrust: 2,949.00 kN (662,961 lbf). Gross mass: 244,046 kg (538,029 lb). Height: 59.00 m (193.00 ft). Diameter: 5.00 m (16.40 ft).

Payload: 2,200 kg (4,800 lb) to a GTO.

Stage Data - Delta IV Small

• Stage 1. 1 x 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. Comments: Low cost expendable stage using lower performance engine. Used in Delta 4, Boeing EELV. Engine can be throttled to 60%.

• Stage 2. 1 x 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. Status: In Production.

• Stage 3. 1 x 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. 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. Status: Out of Production.