Titan 4B rocket
U.S. AIR FORCE FACT SHEET
Posted: September 29, 2001
The Titan 4B consists of two solid-propellant stage "0" motors, a liquid propellant two-stage core and a 16.7-foot-diameter payload fairing. Upgraded three-segment solid rocket motors increase the vehicle's payload capability by approximately 25 percent over the Titan 4A. During a Titan 4 launch the strap-on solid rocket motors are fired first. When the solid propellant is almost depleted (approximately 130 seconds into flight), the first stage is fired and the solid motors are separated from the vehicle. The second stage and upper stage are fired as the previous stage is depleted of fuel and separated.
Martin Company and the Martin Marietta Corporation built more than 140 Titan ICBMs, once the vanguard of America's nuclear deterrent force, for the Air Force. Titan 2s were flown as space launch vehicles in NASA's Gemini manned space program in the mid-1960s. Deactivation of the Titan 2 ICBM system began in July 1982. The last missile was taken from its silo at Little Rock Air Force Base, Arkansas, on June 23, 1987. Years later, the Titan 2 evolved into the Titan 3 family and the Titan 34D. The larger Titan expendable space launch vehicle was originally developed as a backup for the space shuttle in the 1980s, but has become a mainstay for heavy payloads. The Titan 4B represents significant improvements from the Titan 34D and Titan 4A from which it evolved. The first Titan 4B flew February 23, 1997 from Cape Canaveral's launch complex 40 carrying the Defense Support Program satellite designated Flight 18.
The Titan 4B's core consists of an LR87 liquid-propellant rocket that features structurally independent tanks for its hypergolic fuel of Aerozine 50 (hydrazine and unsymmetrical dimethyl-hydrazine) and oxidizer (Nitrogen Tetroxide). This minimizes the hazard of the two mixing if a leak should develop in either tank. Additionally the engines' propellant can be stored in a launch-ready state for extended periods. The use of propellants stored at normal temperature and pressure eliminates delays and gives the Titan 4B the capability to meet critical launch windows. The second stage consists of an LR91 liquid propellant rocket engine attached to an airframe, like stage 1.
Assembly and integration of the Solid Rocket Motor Upgrade occurs in the new Solid Motor Assembly and Readiness Facility at Cape Canaveral Air Station and the Solid Motor Processing Facility at Vandenberg Air Force Base, California.
Standard vehicle configuration
Solid Rocket Motor Upgrade (SRMU)
Range safety improvements
Programmable Aerospace Ground Equipment
Flight data file
Vehicle: Titan 4B (B-34)
Payload: Classified NRO cargo
Launch date: October 4, 2001
Launch time: approx. 2119 GMT (5:19 p.m. EDT)
Launch site: SLC-4E, Vandenberg AFB, Calif.
Launch preview - Our story giving launch overview and guess of payload identity.
Titan 4 history - Chart with listing of previous Titan 4 flights.
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