Solid Rocket Boosters
On the launch pad, the orbiter is supported by two solid rocket boosters. These provide the main thrust to lift the space shuttle off the pad and up to about 150,000 feet (about 28 miles). The solid rocket boosters are the largest solid-propellant motors ever flown and the first designed for reuse. Each is 149.16 feet long and 12.17 feet in diameter and weighs approximately 1,300,000 pounds at launch. After separating from the orbiter, the solid rocket boosters float back to earth using parachutes. They are then recovered from the ocean. The nozzles are plugged, the solid rocket motors are dewatered, and the solid rocket boosters are towed back to the launch site. Each booster is removed from the water, and its components are disassembled and washed with fresh water to limit salt water corrosion. They are then
shipped to the manufacturer for refurbishment for the next mission.
Shown below is a diagram of the solid rocket booster. The major components of the solid rocket booster are the nose cap, frustum, the main tank, and the aft nozzle and skirt. The main tanks contain the solid rocket propellant as well as recovery locators and flight control equipment.
Click here for an enlarged view
