Prometheus II - friznit/Unofficial-BDB-Wiki GitHub Wiki

Titan II(23)G (or Titan 23G) re-purposed parts harvested from decommissioned Titan II ICBMs. It served as medium-lift launch vehicle that carried payloads for USAF, NASA and NOAA. Modified Titan II SLVs were launched from Vandenberg Air Force Base up until 2003, with the final launch taking place nearly 42 years after the first Titan II missile test.

The famous Gemini Launch Vehicle was manufactured specifically for the manned space programme and were near copies of the Titan ICBM, albeit with a number of innovations to improve safety and reliability for manned space flight.

For an historically accurate Gemini-Titan, build the Gemini spacecraft and then rotate it 90 degrees so the top is on the VAB door side. Then build the Titan GLV normally under it. During the launch phase use the "Launch" control point and on reaching orbit switch to the "Flight" control point and roll to heads up or whatever attitude you desire.

Launch Vehicle	First Stage	Boosters	Second Stage	Third Stage
Titan II(23)G	LR-87-5		LR-91-5	Staara 37 / 37S
Titan II GLV	LR-87-5		LR-91-5	Leo (Gemini)

Upper Stages

• Staara-37 optional (Titan 23G)
• Leo (Gemini) Command Pod (Titan II GLV)

Second Stage

• Prometheus-II Fairing Base (23G) or -875 Low Profile Stack Decoupler (GLV)
• Prometheus-II 1.875m Structural Adapter (23G)
• Prometheus Second Stage Liquid Fuel Tank (Prometheus II-1160; Bare interstage mount)
• 4x Titan IIG Control Pack in symmetry below the mid point of the second stage (23G)
• Prometheus-II LR91-167 “Lelantos” Liquid Engine (Compact housing)
• 2x Titan II Velocity Adjustment Motor tucked under the engine mount (Used on the original ICBM, removed for GLV and 23G)

First Stage

• Prometheus Vented Interstage (Prometheus II)
• Prometheus First Stage Upper Liquid Fuel Tank (Prometheus II-2480)
• Prometheus First Stage Lower Liquid Fuel Tank (Prometheus II-1960)
• Prometheus LR87-548 “Pallas” liquid engine (Prometheus II Engine Shroud)

Titan II (SM-68B) & Titan II(23)G