ALLEN PARK, MI - A little known battle at Ford Motor Co.'s leased wind-tunnel facility took place here not long ago, as designers of the new '09 Flex cross/utility vehicle went head-to-head with aerodynamics engineers. At issue was how to keep the boxy shape that made the Fairlane concept version a big hit on the auto-show circuit, while also improving the production version's aerodynamics to boost fuel economy.
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