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
Drop D tuning three open bass strings form a D5 power chord. Other fifth chords are made when barred with the index finger of the fretting hand shifted up the fretboard. Drop D tuning is frequently used in heavy metal and its various subgenres, as guitarists in these styles often need fast transitions between power chords. Drop D is also used in metal because it adds two lower semitones to the bass range of the rhythm guitar, which adds two more low-range power chords (Eb and D) and enables a "heavier", deeper sound. The tuning has also been used in many other styles