also known as the "Commer Knocker," is an exception. The opposed-piston engine has been utilized since the 1920s and uses two pistons in each cylinder mounted with the heads of the pistons facing ...

How hard could it to be to build a two-stroke internal combustion engine (ICE) from scratch? This is a challenge that [Camden Bowen] gladly set for himself, while foregoing such obvious wastes of ...