Titan IIID

The Titan IIID, also called the Titan 3D, was an American expendable launch system of the Titan rocket family, in essence a Titan IIIC with the Transtage upper stage removed so that it could carry heavy payloads to low Earth orbit. It used two UA1205 solid fuel boosters beside a core with two LR-87-AJ11 engines on the first stage and one LR-91-AJ11 engine on the second. Every launch was made from Space Launch Complex 4E at Vandenberg Air Force Base, beginning on 15 June 1971 with the first KH-9 satellite. Over 22 flights it carried KH-9 and KH-11 reconnaissance satellites, and every launch succeeded. It was retired from service in 1982 and replaced by the uprated Titan 34D.