Endurance racing (motorsport) these classes continued to embrace the endurance format. Multiple drivers per car was an early adaptation as the rigors of endurance racing quickly overcome the abilities of most racing drivers to compete solo, although solo attempts on 24 hour races like Le Mans would continue into the 1950s. The various endurance formats were appealing to manufacturers, not only as alternatives to the expense of Grand Prix racing, but also because of its increased relevance to road going models. In automobile endurance racing, three events have come to form a Triple Crown. They are considered three of the most challenging endurance
Jack Perkins (racing driver) such as the Dunlop V8 Supercar Series, Australian GT Championship, as well as speedway's World Series Sprintcars. Jack Perkins (racing driver) Jack 'Perko' Perkins (born 22 August 1986) is an Australian motor racing driver who previously drove in the Supercars Championship. He is the son of retired Australian race driver and former team owner Larry Perkins, in whose team Perkins Engineering, he drove between 2006 and 2008. Initially competing as an endurance race only driver in 2006, in 2007 Perkins graduated to the full-time drive in the No. 11 Perkins Engineering car, the number made famous in Australian racing by