Titan IIIA

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Titan IIIA
Titan IIIA.jpg
Launch of the first Titan IIIA
FunctionPrototype expendable launch system
ManufacturerMartin Marietta
Country of originUnited States
Height42 metres (138 ft)
Diameter3.05 metres (10.0 ft)
Mass161,730 kilograms (356,550 lb)
Payload to LEO3,100 kilograms (6,800 lb)
Associated rockets
Launch history
Launch sitesLC-20, Cape Canaveral
Total launches4
First flight1 September 1964
Last flight6 May 1965
First stage
Engines2 LR87-9
Thrust1,941.7 kilonewtons (436,500 lbf)
Specific impulse304s
Burn time164 seconds
FuelA-50 / N2O4
Second stage
Engines1 LR91-9
Thrust453.7 kilonewtons (102,000 lbf)
Specific impulse316 sec
Burn time184 seconds
FuelA-50 / N2O4
Third stage – Transtage
Engines2 AJ10-138
Thrust71 kilonewtons (16,000 lbf)
Specific impulse311 sec
Burn time440 seconds
FuelA-50 / N2O4

The Titan IIIA or Titan 3A was an American expendable launch system, launched four times in 1964 and 1965,[1] to test the Transtage upper stage which was intended for use on the larger Titan IIIC. The Transtage was mounted atop two core stages derived from the Titan II. The Titan IIIA was also used as the core of the Titan IIIC.

The Titan IIIA made its maiden flight on 1 September 1964, but the Transtage failed to pressurize, resulting in a premature cutoff, and failure to reach orbit.[2] A second test on 10 December was successful. Two further launches occurred in 1965 with Lincoln Experimental Satellites, before the Titan IIIA was retired.

Launch history[edit]

Date/Time (GMT) S/N Payload Outcome Remarks
1 September 1964
3A-2[1] N/A Failure Transtage test flight
Transtage failed to pressurize
10 December 1964
3A-1[1] N/A Success Transtage test flight
11 February 1965
3A-3[1] LES-1 Success
6 May 1965
3A-4[1] LES-2/LCS-1 Success


  1. ^ a b c d e Krebs, Gunter. "Titan-3A". Gunter's Space Page. Retrieved 2009-01-25.
  2. ^ Wade, Mark. "Titan". Encyclopedia Astronautica. Retrieved 2009-01-25.
  3. ^ a b c d McDowell, Jonathan. "Titan". Launch Vehicles Database. Jonathan's Space Page. Retrieved 2009-01-25.

External links[edit]

Media related to Titan IIIA at Wikimedia Commons