Thor home
topic index
Model: Thor DM-19. Gross Mass: 49,340 kg (108,770 lb). Empty Mass: 3,125 kg (6,889 lb). Thrust (vac): 758.711 kN (170,565 lbf). Isp: 282 sec. Burn time: 165 sec. Propellants: Lox/Kerosene. Isp(sl): 248 sec. Diameter: 2.44 m (8.00 ft). Span: 2.44 m (8.00 ft). Length: 18.42 m (60.43 ft). Country: USA. No Engines: 1. Motor: LR79-7. Status: Retired 1980. Cost $ : 4.930 million. First Flight: 1957. Last Flight: 1980. No Launched: 224. No Failed: 17.

Model: Thor DM-21. Gross Mass: 48,354 kg (106,602 lb). Empty Mass: 2,948 kg (6,499 lb). Thrust (vac): 760.643 kN (170,999 lbf). Isp: 285 sec. Burn time: 164 sec. Propellants: Lox/Kerosene. Isp(sl): 250 sec. Diameter: 2.44 m (8.00 ft). Span: 2.44 m (8.00 ft). Length: 18.41 m (60.40 ft). Country: USA. No Engines: 1. Motor: MB-3-1. Status: Retired 1969. Cost $ : 7.830 million. First Flight: 1959. Last Flight: 1969. No Launched: 106.

Model: Delta Thor TA. Gross Mass: 49,442 kg (109,000 lb). Empty Mass: 3,175 kg (6,999 lb). Thrust (vac): 866.710 kN (194,844 lbf). Isp: 290 sec. Burn time: 150 sec. Propellants: Lox/Kerosene. Isp(sl): 256 sec. Diameter: 2.44 m (8.00 ft). Span: 2.44 m (8.00 ft). Length: 18.41 m (60.40 ft). Country: USA. No Engines: 1. Motor: MB-3-3. Status: Retired 1968. Cost $ : 7.830 million. First Flight: 1963. Last Flight: 1968. No Launched: 85. Other designations: Thrust Augmented Thor.

Model: Delta Thor LT. Gross Mass: 70,354 kg (155,104 lb). Empty Mass: 3,715 kg (8,190 lb). Thrust (vac): 866.710 kN (194,844 lbf). Isp: 290 sec. Burn time: 215 sec. Propellants: Lox/Kerosene. Isp(sl): 256 sec. Diameter: 2.44 m (8.00 ft). Span: 2.44 m (8.00 ft). Length: 21.43 m (70.30 ft). Country: USA. No Engines: 1. Motor: MB-3-3. Status: Retired 1973. Cost $ : 10.440 million. First Flight: 1966. Last Flight: 1973. No Launched: 101. No Failed: 2. Other designations: Long Tank Thor.

Model: Delta Thor ELT. Gross Mass: 84,067 kg (185,336 lb). Empty Mass: 4,059 kg (8,948 lb). Thrust (vac): 1,030.208 kN (231,600 lbf). Isp: 296 sec. Burn time: 222 sec. Propellants: Lox/Kerosene. Isp(sl): 262 sec. Diameter: 2.44 m (8.00 ft). Span: 2.44 m (8.00 ft). Length: 22.40 m (73.40 ft). Country: USA. No Engines: 1. Motor: RS-27. Status: Retired 1990. Cost $ : 11.600 million. First Flight: 1972. Last Flight: 1990. No Launched: 37. Other designations: Extended Length Tank Thor.

Model: Delta Thor RS27. Gross Mass: 84,368 kg (185,999 lb). Empty Mass: 4,360 kg (9,610 lb). Thrust (vac): 1,030.218 kN (231,602 lbf). Isp: 296 sec. Burn time: 223 sec. Propellants: Lox/Kerosene. Isp(sl): 262 sec. Diameter: 2.44 m (8.00 ft). Span: 2.44 m (8.00 ft). Length: 22.37 m (73.39 ft). Country: USA. No Engines: 1. Motor: RS-27. Status: Retired 1989. Cost $ : 11.600 million. First Flight: 1974. Last Flight: 1989. No Launched: 92. No Failed: 1. Other designations: Extended Length Thor RS-27.

Model: H-1-1. Gross Mass: 85,800 kg (189,100 lb). Empty Mass: 4,400 kg (9,700 lb). Thrust (vac): 866.710 kN (194,844 lbf). Isp: 290 sec. Burn time: 270 sec. Propellants: Lox/Kerosene. Isp(sl): 253 sec. Diameter: 2.44 m (8.00 ft). Span: 2.44 m (8.00 ft). Length: 22.00 m (72.00 ft). Country: Japan. No Engines: 1. Motor: MB-3-3. Status: Retired 1992. Cost $ : 30.000 million. First Flight: 1981. Last Flight: 1992. No Launched: 21. Other designations: Extended Length Tank Thor MB-3.

License built MB-3 ELT Thor

Model: Delta Thor XLT. Gross Mass: 101,700 kg (224,200 lb). Empty Mass: 5,690 kg (12,540 lb). Thrust (vac): 1,032.002 kN (232,003 lbf). Isp: 295 sec. Burn time: 274 sec. Propellants: Lox/Kerosene. Isp(sl): 264 sec. Diameter: 2.44 m (8.00 ft). Span: 2.44 m (8.00 ft). Length: 26.05 m (85.46 ft). Country: USA. No Engines: 1. Motor: RS-27A. Status: Retired 1992. Cost $ : 11.600 million. First Flight: 1989. Last Flight: 1992. No Launched: 14. Other designations: Extra ELT Thor.

Model: Delta Thor XLT-C. Gross Mass: 101,900 kg (224,600 lb). Empty Mass: 5,900 kg (13,000 lb). Thrust (vac): 1,054.195 kN (236,992 lbf). Isp: 302 sec. Burn time: 265 sec. Propellants: Lox/Kerosene. Isp(sl): 255 sec. Diameter: 2.44 m (8.00 ft). Span: 2.44 m (8.00 ft). Length: 26.05 m (85.46 ft). Country: USA. No Engines: 1. Motor: RS-27C. Status: Study 1987. Cost $ : 11.600 million. First Flight: 1990. Last Flight: 2007. No Launched: 218. Other designations: Extra ELT Thor+.

Model: Delta 3 - 1. Gross Mass: 104,377 kg (230,111 lb). Empty Mass: 6,822 kg (15,039 lb). Thrust (vac): 1,085.790 kN (244,095 lbf). Isp: 302 sec. Burn time: 320 sec. Propellants: Lox/Kerosene. Isp(sl): 254 sec. Diameter: 2.44 m (8.00 ft). Span: 4.00 m (13.10 ft). Length: 20.00 m (65.00 ft). Country: USA. No Engines: 1. Motor: RS-27A. Status: Retired 2000. First Flight: 1998. Last Flight: 2000. No Launched: 3.

The first stage of the Delta III is powered by a Rocketdyne RS-27A main engine which has a 12:1 expansion ratio and employs a turbine/turbopump, a regeneratively cooled thrust chamber and nozzle, and a hydraulically gimbaled thrust chamber and nozzle that provides pitch and yaw control. Two Rocketdyne vernier engines provide roll control during main-engine burn, and attitude control between main-engine cutoff (MECO) and second-stage separation. High repeatability of mixture ratio ensures very accurate propellant utilization for the engines. The Rocketdyne RS-27A main and vernier engines are both unchanged from Delta II.

Used on Launch Vehicles:
Contact us with any corrections, additions, or comments.
Conditions for use of drawings, pictures, or other materials from this site..
To contact astronauts or cosmonauts.

© Mark Wade, 1997 - 2008 except where otherwise noted.