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Engineers at NASA's Marshall Space Flight Center are working on designs for a new giant launch vehicle called Magnum. It would use a curious mix of Russian rocket engines -- derived from the abandoned Soviet Energia rocket program -- and newly developed strap-on, liquid-fueled boosters that would first be tested out on space shuttles.

The Magnum would use the space shuttle launch facilities at Cape Canaveral and could launch 80 tons (81,280 kilograms) of payload into low Earth orbit (LEO). This compares with around 20 tons (20,320 kilograms) for the piloted space shuttle, and for un-piloted vehicles like the U.S.' Titan 4-B and the European Space Agency's Ariane 5. Its lift capacity, however, would be less than the 100 tons (101,600 kilograms) that the Saturn 5 and Energia could manage.