Richard Hoff has built a pair of custom 2- cylinder engines. He made these by combining two single-cylinder off-the-shelf engines to create a horizontally opposed twin-cylinder engine. He did this with numerous engine types, designing and machining all of the necessary parts himself in order to mate two engines together. The two engine types on display are a Webra 10 and an OS-MAX (shown here). Richard was a lifetime machinist owning his own company building unique projects for the aerospace community. Once retired, he began building mechanical models of all kinds.