Titan IIID

{{Short description|Expendable launch system used by the National Reconnaissance Office}}

{{Infobox Rocket

|image = Titan IIID rocket.jpg

|caption = Launch of a Titan IIID

|function = Expendable launch system

|manufacturer = Martin Marietta

|country-origin = United States

|height = {{convert|36|m|abbr=on}}

|diameter = {{convert|3.05|m|abbr=on}}

|mass = {{convert|612990|kg|abbr=on}}

|stages = Two

|family = Titan

|status = Retired

|sites = SLC-4E, Vandenberg AFB

|launches = 22

|success = 22

|first= 15 June 1971

|last= 17 November 1982

|capacities =

{{Infobox Rocket/Payload

|location = LEO

|kilos = {{convert|12300|kg|abbr=on}}

}}

|stagedata =

{{Infobox Rocket/Stage

|name = UA1205

|diff = Stage 0

|type = booster

|number = Two

|engines = off

|thrust = {{convert|5849|kN|abbr=on}}

|SI = 263 sec

|burntime = 115 seconds

|fuel = Solid

}}

{{Infobox Rocket/Stage

|type = stage

|stageno = First

|engines = 2 LR87-11

|thrust = {{convert|2340|kN|abbr=on}}

|SI = 302 sec

|burntime = 147 seconds

|fuel = N₂O₄ / Aerozine 50

}}

{{Infobox Rocket/Stage

|type = stage

|stageno = Second

|engines = 1 LR91-11

|thrust = {{convert|454|kN|abbr=on}}

|SI = 316 sec

|burntime = 205 seconds

|fuel = N₂O₄ / Aerozine 50

}}

}}

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.{{cite web|url=http://space.skyrocket.de/doc_lau_det/titan-3d.htm|title=Titan-3D|last=Krebs|first=Gunter|publisher=Gunter's Space Page|access-date=2009-01-25}} 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.{{cite web|url=http://www.astronautix.com/lvs/titan.htm|archive-url=https://web.archive.org/web/20080805095233/http://www.astronautix.com/lvs/titan.htm|url-status=dead|archive-date=August 5, 2008|title=Titan|last=Wade|first=Mark|publisher=Encyclopedia Astronautica|access-date=2009-01-25}} 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.