SONOMA COUNTY, Calif.--When it comes to flying, being green isn't easy.
Here at NASA's second annual General Aviation Challenge this weekend, one of the main prizes was the so-called "green prize," which challenged two-seater planes to fly a 400-mile-long course logging at least 30 miles to the gallon. None of the four planes entered won the $50,000 prize; the best attempt achieved 28.8 miles per gallon. (NASA's ultimate goal is to get the green prize to at least 100 miles per hour and the equivalent of 100 miles per gallon.
The shoe-in … Read more