Titan IV Solid Rocket Motor Upgrade (SRMU)
Increased Performance and Heavier Lift Capacity
The Solid Rocket Motor Upgrade (SRMU) increases the launch capability of the new Titan IVB Space Launch Vehicle. Designed to take advantage of proven, off-the-shelf technologies, the SRMU system provides 25 percent increased performance and heavier lift capability than the boosters of its predecessor.
The SRMU is a three-segment, 10.5 -foot diameter solid rocket motor. A flight set consists of two SRMU's. When fully assembled, each SRMU is approximately 112 feet tall and weighs over 770,000 pounds. With the SRMU, the Titan IVB low-earth-orbit payload exceeds 47,000 pounds and its geosynchronous orbit payload capability ranges up to 12,700 pounds.
SRMU motor segments are manufactured using state-of-the-art automation, robotics, and process controls. Cases are filament wound with computer-controlled winding machines using a composite of high-strength fiber and durable epoxy resin. SRMU's are then cast and finished using an extensive network of computers and robotics, which enables highly accurate control of critical manufacturing processes for a consistent, reliable, high-quality product.
In 1997, Titan IVB launched the Cassini spacecraft and the Huygens Probe on an international mission to study Saturn. Weighing roughly 13,000 pounds, the Cassini spacecraft is one of the largest ever launched. The spacecraft will reach Saturn in 2004.
U.S. Air Force, NASA