There is some big private money backing the company that is designing this motor Eco motor (a US based company). Bill Gates gave them 23 million and another private firm gave them 18 million. They also have the interest of one of the largest helicopter makers in the world. I hope they keep going with this motor and mass produce it one day. Has anybody seen this?

http://www.engineeringtv.com/video/Opposed-Piston-Opposed-Cylinder