Right-Angle Steam Engine from MechanicalGIFs.com

This is an acrylic model of a steam engine that uses two crank arms at a 90 degree angle to each other to create the necessary relationship between the piston and valve movements. It is made from laser-cut acrylic. It should be possible to make using an ordinary desktop laser cutter able to cut 1/8" (3mm) acrylic. Photos and videos can be seen at http://mechanicalgifs.com