Norton Commander (motorcycle) Norton Commander (motorcycle) The Commander was a Norton motorcycle with a Wankel rotary engine. The first Norton Wankel motorcycle was the 1987 air-cooled Classic, built as a special edition of just 100 machines. It was followed by the air-cooled Interpol 2 model. The Commander was a liquid-cooled successor to the Interpol 2, liquid cooling being adopted for greater power and reliability. The Commander's final-drive chain was protected by a full enclosure. Some cycle parts (such as front wheel, forks & brakes) were bought-in Yamaha items. Two types of Commander were built. The P52 was a single-seat model equipped for police
Three Forks Group Three Forks Group The Three Forks Group is a stratigraphical unit of Famennian age in the Williston Basin. It takes the name from the city of Three Forks, Montana, and was first described in outcrop near the city by A.C. Peale in 1893 (for the Three Forks Shale). The Three Forks Group is composed of dolomite, mudstone and bituminous shale. In the subsurface of the Williston Basin, the Three Forks is referred to as the Three Forks "Formation", which lies between the Birdbear Formation below, and the Bakken Formation above. Oil produced from the Three Forks Formation in the Williston