The strange machines look as if they might suddenly dip flaps, lift noses and head off into the wild blue yonder, borne on small wings that protrude fore and aft, and sometimes in between. Actually the wings, or foils, have an entirely different purpose. They are aerodynamically designed to keep a dazzling new crop of racing cars glued to the ground in this year's Indianapolis 500, giving them better stability and traction and thus greater speed. This Saturday, as the traditional field of 33 cars challenges Indy's confining concrete-walled track, speedmuch more than...
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