Encyclopedia Astronautica
Titan 4



t4019426.jpg
Titan 401
Titan 401 - COSPAR 1994-026
titan4.jpg
Titan 3E Centaur
Credit: NASA
titan4dw.gif
Titan 4
Credit: © Mark Wade
titan4l.gif
Titan 4 Large
Credit: © Mark Wade
titan4l2.jpg
Titan 4 Launch
Credit: Lockheed Martin
titanbig.gif
Titan LVs Large
Credit: © Mark Wade
titan404.jpg
Titan 404
Credit: Lockheed Martin
American orbital launch vehicle. Developed to handle military payloads designed for launch on Shuttle from Vandenberg before the USAF pulled out of the Shuttle program after the Challenger disaster. Further stretch of core from Titan 34, 7-segment solid rocket motors (developed for MOL but not used until 25 years later). Enlarged Centaur G used as upper stage (variant of stage designed for Shuttle but prohibited for flight safety reasons after Challenger). Completely revised electronics. All the changes resulted in major increase in cost of launch vehicle and launch operations.

LEO Payload: 17,700 kg (39,000 lb) to a 185 km orbit. Payload: 6,350 kg (13,990 lb) to a GTO. Launch Price $: 400.000 million in 1985 dollars. Flyaway Unit Cost $: 89.360 million in 1997 dollars.

Stage Data - Titan 4

  • Stage 0. 2 x Titan UA1207. Gross Mass: 319,330 kg (704,000 lb). Empty Mass: 51,230 kg (112,940 lb). Thrust (vac): 7,116.999 kN (1,599,965 lbf). Isp: 272 sec. Burn time: 120 sec. Isp(sl): 245 sec. Diameter: 3.05 m (10.00 ft). Span: 3.05 m (10.00 ft). Length: 34.14 m (112.00 ft). Propellants: Solid. No Engines: 1. Engine: UA1207. 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: 886,420 kg (1,954,220 lb).
Payload: 17,700 kg (39,000 lb).
Height: 51.00 m (167.00 ft).
Diameter: 4.33 m (14.20 ft).
Thrust: 12,821.00 kN (2,882,275 lbf).
Apogee: 185 km (114 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...
  • NOSS American military naval signals reconnaisance satellite. 22 launches, 1971.12.14 (OPS 7898 P/L 1) to 1993.08.02 (TLD). Ocean surveillance; aka White Cloud type spacecraft; Navy Ocean Surveillance Satellite; PARCAE. More...
  • NOSS-Subsat American military naval signals reconnaisance satellite. 27 launches, 1976.04.30 (SSU 1 (NOSS 1)) to 1996.05.12 (USA 121). Detected the location of naval vessels using radio interferometry. More...
  • Lacrosse American military side-looking radar all-weather surveillance radar satellite. Operational, first launch 1988.12.02. More...
  • SDS-2 American military communications satellite. 4 launches, 1989.08.08 (USA 40) to 1996.07.03 (USA 125). More...
  • NOSS-2 subsatellite American military naval signals reconnaisance satellite. 6 launches, 1990.06.08 (USA 60) to 1991.11.08 (USA 77). More...
  • NOSS-2 American military naval signals reconnaisance satellite. 5 launches, 1990.06.08 (USA 59) to 1996.05.12 (USA 122). New generation of NOSS naval reconnaissance satellites. 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...
  • Trumpet American military naval signals reconnaisance satellite. 3 launches, 1994.05.03 (USA 103) to 1997.11.08 (USA 136). More...
  • Mercury ELINT American military naval signals reconnaisance satellite. 3 launches, 1994.08.27 (USA 105) to 1998.08.12 (Mercury ELINT). Class of heavy signals intelligence satellites introduced at the end of the 1990's. More...
  • Advanced Orion American military naval signals intelligence and reconnaisance satellite. Highly classified, operational, first launch 1995.05.14. More...
  • TiPS American tether technology satellite. 3 launches, 1996.05.12 (USA 123) to 1998.10.03 (USA 141). The 53 kg satellite consisted of 2 end masses connected by a 4 km tether. NRO (the National Reconnaissance Office) provided funding for the TiPS project. 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...
  • RL-10A-3A Pratt and Whitney lox/lh2 rocket engine. 73.4 kN. Isp=444s. Used on Centaur stage atop Atlas G, Atlas I, Atlas II, Titan 4. First flight 1984. More...
  • UA1207 CSD solid rocket engine. 7116.9 kN. Isp=272s. First flight 1989. 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...

Home - Browse - Contact
© / Conditions for Use