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
Regular tuning and temperament of generators, it is a regular tuning of rank 3. In just intonation, the pair of notes forming every consonance has a frequency ratio whose numerator and denominator are small whole numbers. As a consequence, these intervals must belong to a "p"-limit tuning for some small prime . Thus, the intervals of Ptolemy's syntonic diatonic scale, for instance, in which the relative pitches of the notes are completely determined by the requirement that all three of its primary triads be perfectly just major chords, form a 5-limit tuning, since they can be generated by intervals of sizes , , and