Eric, you might already know about this shock wave disc engine. My son sent me this article:

I can't say I'm wild about the $2.5 mil grant that they are receiving to study and develop the engine, but I think it's pretty cool if they can get an engine to work without a transmission or a cooling system.

I guess my question is: Theoretically, could it work to replace all our driving habits, including long distance driving? I also wonder what kind of car they would need to design to use it since it is much smaller and much lighter.

Thoughts anyone?