Radically new engine designs almost always aren't. Unusual & highly promising engine implementations almost invariably fail to deliver. Even the most plausible designs almost always meet the above two "rules" All that said, this one *LOOKS* promising and new. TBD. One stroke multi fuel, pistons have no sideforces, conrods slide straight, smaller engine size and weight per swept volume than conventional designs, aiming at about 5% energy efficiency gain over conventional engines. Spokesman on video below sounded very cool calm and collected, & *seemed* to know his stuff. Whther it would actuually work as well as they claim I cannot tell. Murphy says no. http://www.monolithengines.com/ Video http://www.engineeringtv.com/video/Two-and-Four-Cylinder-Single-St Russell --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .