The free piston engine, a design with opposed pistons working against compressed air springs and combining both compression and firing strokes in a single axis, doesn’t turn anything in itself ...

The free piston engine, a design with opposed pistons working against compressed air springs and combining both compression and firing strokes in a single axis, doesn’t turn anything in itself ...

While most engines made in the last 100 years have adhered to the standard single-piston per-cylinder design, the TS3, also known as the "Commer Knocker," is an exception. The opposed-piston ...

Private collector Jay Leno owns one of them too. The opposed piston engine concept is not a new one, and the basic design has ...

this design would let two pistons opposed to each other use the same crankshaft journal. That could make manufacturing more ...