August 11, 2008 5:30 PM PDT
Here's a view of Team Kantankeros Katana's "omnivore" engine, a dual biodiesel and gas engine, which could conceivably run on everything from automobile gasoline to french fry oil. Contest organizers have said a biodiesel-engine plane could go 900 miles on 25 gallons.
The team was a shoe-in to win NASA's 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. And Katana pulled out of the race at the last minute because of a mechanical problem.
Photo by Stefanie Olsen/CNET News
