Encyclopedia Astronautica
Titan 4B



titan4u.gif
Titan 4U
Credit: © Mark Wade
American orbital launch vehicle. Titan 4 with Upgraded Solid Rocket Motors replacing UA1207. Developed to improve performance for certain missions, and reduce number of field joints in motor after Challenger and Titan 34D explosions involving segmented motors.

LEO Payload: 21,680 kg (47,790 lb) to a 150 km orbit at 28.60 degrees. Payload: 5,760 kg (12,690 lb) to a GEO. Development Cost $: 15,800.000 million. Launch Price $: 432.000 million in 1985 dollars. Flyaway Unit Cost $: 84.300 million in 1996 dollars in 1999 dollars.

Stage Data - Titan 4B

  • Stage 0. 2 x Titan USRM. Gross Mass: 357,239 kg (787,577 lb). Empty Mass: 52,040 kg (114,720 lb). Thrust (vac): 7,560.681 kN (1,699,709 lbf). Isp: 286 sec. Burn time: 140 sec. Isp(sl): 259 sec. Diameter: 3.20 m (10.40 ft). Span: 3.20 m (10.40 ft). Length: 33.54 m (110.03 ft). Propellants: Solid. No Engines: 1. Engine: USRM. Other designations: Upgraded Solid Rocket Motor. Status: In production.
  • Stage 1. 1 x Titan 4-1. Gross Mass: 163,000 kg (359,000 lb). Empty Mass: 8,000 kg (17,600 lb). Thrust (vac): 2,428.312 kN (545,906 lbf). Isp: 302 sec. Burn time: 164 sec. Isp(sl): 250 sec. Diameter: 3.05 m (10.00 ft). Span: 3.05 m (10.00 ft). Length: 26.37 m (86.51 ft). Propellants: N2O4/Aerozine-50. No Engines: 2. Engine: LR-87-11. Status: In Production.
  • Stage 2. 1 x Titan 4-2. Gross Mass: 39,500 kg (87,000 lb). Empty Mass: 4,500 kg (9,900 lb). Thrust (vac): 459.510 kN (103,302 lbf). Isp: 316 sec. Burn time: 223 sec. Isp(sl): 160 sec. Diameter: 3.05 m (10.00 ft). Span: 3.05 m (10.00 ft). Length: 9.94 m (32.61 ft). Propellants: N2O4/Aerozine-50. No Engines: 1. Engine: LR-91-11. Status: In Production.
  • Stage 3. 1 x IUS-1. Gross Mass: 10,841 kg (23,900 lb). Empty Mass: 1,134 kg (2,500 lb). Thrust (vac): 181.501 kN (40,803 lbf). Isp: 296 sec. Burn time: 152 sec. Isp(sl): 220 sec. Diameter: 2.34 m (7.67 ft). Span: 2.34 m (7.67 ft). Length: 3.52 m (11.54 ft). Propellants: Solid. No Engines: 1. Engine: SRM-1. Other designations: Orbus 21D. Status: In Production.
  • Stage 3. 1 x Centaur G. Gross Mass: 23,880 kg (52,640 lb). Empty Mass: 2,775 kg (6,117 lb). Thrust (vac): 146.800 kN (33,002 lbf). Isp: 444 sec. Burn time: 625 sec. Diameter: 4.33 m (14.20 ft). Span: 4.33 m (14.20 ft). Length: 9.00 m (29.50 ft). Propellants: Lox/LH2. No Engines: 2. Engine: RL-10A-3A. Status: In Production. Comments: Centaur for Titan 4.
  • Stage 4. 1 x IUS-2. Gross Mass: 3,919 kg (8,639 lb). Empty Mass: 1,170 kg (2,570 lb). Thrust (vac): 78.413 kN (17,628 lbf). Isp: 304 sec. Burn time: 103 sec. Isp(sl): 200 sec. Diameter: 1.61 m (5.28 ft). Span: 1.61 m (5.28 ft). Length: 2.08 m (6.82 ft). Propellants: Solid. No Engines: 1. Engine: SRM-2. Other designations: TOS. Status: In Production.

Status: Out of production.
Gross mass: 943,050 kg (2,079,060 lb).
Payload: 21,680 kg (47,790 lb).
Height: 44.00 m (144.00 ft).
Diameter: 3.05 m (10.00 ft).
Thrust: 13,693.80 kN (3,078,489 lbf).
Apogee: 150 km (90 mi).

More... - Chronology...


Associated Countries
Associated Spacecraft
  • DSP American military early warning satellite. 23 launches, 1970.11.06 (IMEWS 1) to 2007.11.11 (USA 176). An evolving series of satellites built by the United States to detect intercontinental ballistic missiles on launch. More...
  • Lacrosse American military side-looking radar all-weather surveillance radar satellite. Operational, first launch 1988.12.02. More...
  • Improved Crystal American military surveillance satellite. Operational, first launch 1992.11.28. Improved CRYSTAL was an optical reconnaissance satellite built for the US National Reconnaissance Office. Prime contractor was thought to be Lockheed. More...
  • Milstar American military communications satellite. 6 launches, 1994.02.07 (USA 99) to 2003.04.08 (USA 169). Milstar was a series of advanced US military communications satellites designed to provide global jam-resistant communications for military users. More...
  • Advanced Orion American military naval signals intelligence and reconnaisance satellite. Highly classified, operational, first launch 1995.05.14. More...
  • Cassini American outer planets probe. 2 launches, 1997.10.15 (Cassini) and (Huygens). The Cassini spacecraft was a scientific platform designed to perform an in-depth study of the Saturnian system. More...
  • Huygens European outer planets probe. One launch, 1997.10.15. Titan landing probe; attached to Cassini spacecraft. More...

Associated Engines
  • LR87-11 Aerojet N2O4/Aerozine-50 rocket engine. 1218.8 kN. Out of production. Isp=302s. Powered Titan 3 and 4 first stages. Replaced the -9 model, first flown 1968. First flight 1964. More...
  • LR91-11 Aerojet N2O4/Aerozine-50 rocket engine. 467 kN. Out of production. Isp=316s. Second stage engine for Titan 3 and 4. First flight 1968. More...
  • USRM Hercules solid rocket engine. 7560.5 kN. Isp=286s.Strap-on booster for Titan 4B. First flight 1997. More...

See also
  • Titan The Titan launch vehicle family was developed by the United States Air Force to meet its medium lift requirements in the 1960's. The designs finally put into production were derived from the Titan II ICBM. Titan outlived the competing NASA Saturn I launch vehicle and the Space Shuttle for military launches. It was finally replaced by the USAF's EELV boosters, the Atlas V and Delta IV. Although conceived as a low-cost, quick-reaction system, Titan was not successful as a commercial launch vehicle. Air Force requirements growth over the years drove its costs up - the Ariane using similar technology provided lower-cost access to space. More...

Associated Manufacturers and Agencies
  • Martin American manufacturer of rockets, spacecraft, and rocket engines. Martin Marietta Astronautics Group (1956), Denver, CO, USA. More...

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