Titan IIID
The Titan IIID or Titan 3D was an American expendable launch system, part of the Titan rocket family. Titan IIID was flown 22 times with KH-9 and KH-11 satellites between 1971 and 1982, all successful launches. Essentially a Titan IIIC with the Transtage removed, it was designed for heavy LEO payloads.
The rocket had two UA1205 solid fuel boosters, the first stage was equipped with two LR-87-AJ11 engines and the second stage had a single LR-91-AJ11 engine.
Part of the Titan rocket family, the Titan IIID first flew on 15 June 1971, launching the first KH-9 satellite. It was retired from service in 1982, and replaced by the uprated Titan 34D. All launches occurred from Space Launch Complex 4E at Vandenberg Air Force Base.
Launch history
| Date/Time | Launch Site | S/N | Payload | Outcome | Remarks |
| 15 June 1971 18:41 | VAFB LC-4E | 3D-1 | OPS-8709 | ||
| 20 January 1972 18:36 | VAFB LC-4E | 3D-2 | OPS-1737 | ||
| 7 July 1972 17:46 | VAFB LC-4E | 3D-5 | OPS-7293 | ||
| 10 October 1972 18:03 | VAFB LC-4E | 3D-3 | OPS-8314 | ||
| 9 March 1973 21:00 | VAFB LC-4E | 3D-6 | OPS-8410 | ||
| 13 July 1973 20:22 | VAFB LC-4E | 3D-7 | OPS-8261 | ||
| 10 November 1973 20:12 | VAFB LC-4E | 3D-8 | OPS-6630 | ||
| 10 April 1974 20:20 | VAFB LC-4E | 3D-9 | OPS-6245 | ||
| 29 October 1974 19:30 | VAFB LC-4E | 3D-4 | OPS-7122 | ||
| 8 June 1975 18:30 | VAFB LC-4E | 3D-10 | OPS-6381 | ||
| 4 December 1975 20:30 | VAFB LC-4E | 3D-13 | OPS-5547 | ||
| 8 July 1976 18:30 | VAFB LC-4E | 3D-14 | OPS-4699 | ||
| 19 December 1976 18:19 | VAFB LC-4E | 3D-15 | OPS-5705 | ||
| 27 June 1977 18:30 | VAFB LC-4E | 3D-17 | OPS-4800 | ||
| 26 March 1978 18:40 | VAFB LC-4E | 3D-20 | OPS-0460 | ||
| 14 June 1978 18:23 | VAFB LC-4E | 3D-18 | OPS-4515 | ||
| 16 March 1979 18:30 | VAFB LC-4E | 3D-21 | OPS-3854 | ||
| 7 February 1980 21:10 | VAFB LC-4E | 3D-19 | OPS-2581 | ||
| 18 June 1980 18:30 | VAFB LC-4E | 3D-16 | OPS-3123 | ||
| 3 September 1981 18:29 | VAFB LC-4E | 3D-22 | OPS-3984 | ||
| 11 May 1982 18:35 | VAFB LC-4E | 3D-24 | OPS-5642 | ||
| 17 November 1982 21:18 | VAFB LC-4E | 3D-23 | OPS-9627 |