You can't imagine how hard it can be to get even the simplest idea into a cylinder head, or ``block head'' as we used to say. They never made skulls that thick. Open 'em up and it's obvious that they're basically just ``air heads.'' Ain't nuthin' under the hood. There ...
Usually has a spring-loaded piston which, when triggered, retracts rapidly from a cylinder to leave behind an evacuated volume. I guess I should be embarrassed to admit that I have found these to be a lot of fun. Consider EDSYN's Challenger Soldapullt ® ``External main spring design...