to drive the camshaft(s). Timing chains do not usually require replacement at regular intervals, however the disadvantage is that they are noisier than timing belts. Gear train A gear train system between the crankshaft and the camshaft is commonly used in diesel overhead camshaft engines used in heavy trucks. Gear trains are not commonly used in engines for light trucks or automobiles. Other camshaft drive systems Several OHC engines up until the 1950s used a shaft with bevel gears to drive the camshaft. Examples include the 1908–1911 Maudslay 25/30, the Bentley 3 Litre, the 1917-? Liberty L-12, the 1929-1932 MG Midget, the 1925-1948 Velocette K series, the 1931-1957 Norton International and the 1947-1962 Norton Manx. In more recent times, the 1950-1974 Ducati Single, 1973-1980 Ducati L-twin engine, 1999-2007 Kawasaki W650 and 2011-2016 Kawasaki W800 motorcycle engines have used bevel shafts. The Crosley four cylinder was the last automotive engine to use the shaft tower design to drive the camshaft, from 1946 to 1952; the rights to the Crosley engine format were bought by a few different companies, including General Tire in 1952, followed by Fageol in 1955, Crofton in 1959, Homelite in 1961, and Fisher Pierce in 1966, after Crosley closed the automotive factory doors, and they continued to produce the same engine for several more years. A camshaft drive using three sets of cranks and rods in parallel was used in the 1920–1923 Leyland Eight luxury car built in the United Kingdom. A similar system was used in the 1926-1930 Bentley Speed Six and the 1930-1932 Bentley 8 Litre. A two-rod system with counterweights at both ends was used by many models of the 1958-1973 NSU Prinz. History 1900–1914 Among the first overhead camshaft engines were the 1902 Maudslay SOHC engine built in the United Kingdom and the 1903 Marr Auto Car SOHC engine built in the United States. The first DOHC engine was a Peugeot inline-four racing engine which powered the car that won the 1912 French Grand Prix. Another Peugeot with a DOHC engine won the 1913 French Grand Prix, followed by the Mercedes-Benz 18/100 GP with an SOHC engine winning the 1914 French Grand Prix. The Isotta Fraschini Tipo KM— built in Italy from 1910–1914— was one of the first production cars to use an SOHC engine. World War I During World War I, both the Allied and Central Powers; specifically those of the German Empire's