Rethinking Heavy Lift

By Bill Sweetman .
Washington .

Under a little-publicized program sponsored by the Pentagon, a small Southern California company is working on a design that is radical even by the quirky standards of buoyancy-aided aircraft: a rigid-hulled aircraft that varies its density to land and take off vertically.

After Congress pulled funding from the Defense Advanced Research Projects Agency’s (Darpa) Walrus program in ...

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