Titan IIID

Titan IIID

Launch of a Titan IIID
Function	Expendable launch system
Manufacturer	Martin Marietta
Country of origin	United States
Size
Height	36 metres (118 ft)
Diameter	3.05 metres (10.0 ft)
Mass	612,990 kilograms (1,351,400 lb)
Stages	Two
Capacity
Payload to LEO	12,300 kilograms (27,000 lb)
Associated rockets
Family	Titan
Launch history
Status	Retired
Launch sites	SLC-4E, Vandenberg AFB
Total launches	22
Successes	22
Maiden flight	15 June 1971
Last flight	17 November 1982
Boosters (Stage 0) - UA1205
No boosters	Two
Engines	1 solid
Thrust	5,849 kilonewtons (1,315,000 lbf)
Specific impulse	263 sec
Burn time	115 seconds
Fuel	Solid
First Stage
Engines	2 LR87-11
Thrust	2,340 kilonewtons (530,000 lbf)
Specific impulse	302 sec
Burn time	147 seconds
Fuel	A-50/N2O4
Second Stage
Engines	1 LR91-11
Thrust	454 kilonewtons (102,000 lbf)
Specific impulse	316 sec
Burn time	205 seconds
Fuel	A-50/N2O4

The Titan IIID or Titan 3D was an American expendable launch system, launched twenty two times with KH-9 and KH-11 satellites between 1971 and 1982. It was a two-stage derivative of the three stage Titan IIIC, optimised for low Earth orbit launches through the removal of the Transtage upper stage of the IIIC.

The Titan IIID made its maiden flight on 15 June 1971, launching the first KH-9 satellite. It was retired from service in 1982, and replaced by the Titan 34D. All launches occurred from Space Launch Complex 4E at Vandenberg Air Force Base.