O.C. Backing 2 Contenders in Next Space Race

Design Derby

Three contractors are vying to build the X-33, a prototype for a reusable launch vehicle envisioned as a low-cost replacement for the space shuttle. The experimental, single-state spacecraft would have a lightweight composite structure, reusable cryogenic tanks and durable thermal protection systems--all capable of withstanding multiple launches and reentries. It would be about 100 feet long and would be fueled by liquid hydrogen. All vehicles take off vertically and land horizontally. NASA will select the winning X-33 design in June.