Working under contract with NASA’s Space Technology Game Changing Development Program, Boeing has designed and built two composite liquid-hydrogen fuel tanks for heavy-lift launch vehicles and other future air and space missions. Final assembly just wrapped up on the larger (5.5-meter) tank at the Boeing Developmental Center in Tukwila, Wash. The tank will be loaded onto the NASA Super Guppy, a large, wide-bodied cargo aircraft, and transported to NASA’s Marshall Space Flight Center in Huntsville, Ala., for testing. This forthcoming test follows Boeing and NASA successfully testing a 2.4-meter composite tank at Marshall last year. These tanks promise a 30 percent weight reduction and 25 percent cost savings over the state of the art metallic tanks used today.