- Parachutes deploy from the SRBs.
- SRBs will land in the ocean about 140 miles (225 km) off the coast of Florida.
- Ships will recover the SRBs and tow them back to Cape Canaveral for processing and re-use.
The ET is made of aluminum and aluminum composite materials. It has two separate tanks inside,
- the forward tank for oxygen
- and the aft tank for hydrogen, separated by an intertank region.
Each tank has baffles to dampen the motion of fluid inside. Fluid flows from each tank through a 17-inch (43 cm) diameter feed line out of the ET through an umbilical line into the shuttle's main engines. Through these lines, oxygen can flow at a maximum rate of 17,600 gallons/min (66,600 l/min) and hydrogen can flow at a maximum rate of 47,400 gallons/min (179,000 l/min).
The ET is covered with a 1-inch (2.5 cm) thick layer of spray-on, polyisocyanurate foam insulation. The insulation keeps
- the fuels cold,
- protects the fuel from heat that builds up on the ET skin in flight,
- and minimizes ice formation.