The first lightweight Space Shuttle external tank has arrived at the Kennedy Space Center, Florida to be prepared for its first flight on the STS91/ Discovery mission, to make the ninth docking at the Russian Mir space station in May. The aluminium lithium tank, which holds the cryogenic liquid oxygen and liquid hydrogen propellants for the Shuttle's three main engines, is 3,175kg lighter than the alloy tank now used. It will provide extra payload capability, particularly for flights into high inclination orbits such as those in which the Mir flies.
Source: Flight International
