Types of LEGO Vacuum Engines

These are the different kinds of LEGO Vacuum Engines by people globally. This is not an exhaustive list but may serve as a resource for further research.


 * Double Acting
 * Oscillating
 * Corliss
 * Single Acting
 * Single Valve System
 * Overhead Valve
 * Overhead Cam (single or dual)
 * Opposed piston
 * Butterfly engine
 * Flathead (cam-in-block)
 * Rotary Valve