<p>WOOMERA, South Australia -- Sandwiched between today's cattle-car jumbo jets and tomorrow's suborbital transport, Japan believes there's a niche for a revamped and updated supersonic jet -- say around 2012.</p>
<p>Japan's National Aerospace Laboratory (NAL) now has a scale-model mockup of the plane, an 11-meter-long, two-ton beast sitting in the Australian desert, set to be test-flown in early July. Designed exclusively by supercomputer, the NAL has jumped directly from binary equations to flight tests of the new plane -- skipping wind tunnel tests entirely.</p>