As Obama slashes funding for the U.S. hydrogen fuel cell program, hydrogen enthusiasts are going open source. Autocar reports that U.K.-based personal transport maker Riversimple will unveil its Smart car-sized hydrogen-powered vehicle on June 16. The vehicle’s size, fuel efficiency and other vital statistics have already been posted on the Hyrban wiki Web site.

What have they accomplished?  The Urban Car weighs just 772 pounds (350 kilograms), can reach speeds of 50 miles (81 kilometers) per hour, and has a range of more than 200 miles (322 kilometers). It runs off a tiny six kilowatt fuel cell, far smaller than the 100 kilowatt system found in the Honda Clarity.  Four electric motors on each wheel also function as the breaks and electricity generators.