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 ...

Established in 2008, the company, focusing on a revolutionary new opposed-piston opposed-cylinder (OPOC) engine, went bust in ...

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 ...

they also made hearts beat faster among light-airplane owners and pilots who fly behind the traditional horizontally opposed piston engines that have powered smaller aircraft for decades.