Air Dams

Chaparral Cars was a United States automotive company which built prototype race cars from the 1960s through the early 1980s. Chaparral was founded by Jim Hall, a Texas oil magnate with an impressive combination of skills in engineering and race car driving. more...

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Throughout the 1960s and 1970s, Chaparral's distinctive race cars experienced strong success in both American and European racing circuits. Despite winning the Indy 500 in 1980, the Chaparrals left motor racing in 1982. Chaparral cars also featured in the SCCA/CASC CanAm series and in the European FIA Group 7. It is also said in popular culture that the Chaparral race cars were barred from events because of them being too effective and fast, especially the 2J.

Chaparral was the first to introduce effectively designed air dams and spoilers ranging from the tabs attached to the earliest 2 model to the driver-controlled high wing 'flipper' on the astoundingly different looking 2E, all the way through to Hall's most idealistically inspired creation, the 2J, the car that would forever be known as the 'vacuum cleaner'. The use by Jim Hall of a semi-automatic transmission in the Chaparral created flexibility in the use of adjustable aerodynamic devices.

The development of the Chaparral chronicles the key changes in race cars in the '60s and '70s in both aerodynamics and tires. Jim Hall's training as an engineer taught him to approach problems in a methodical manner and his access to the engineering team at Chevrolet as well as at Firestone changed aerodynamocs and race car handling from an art to empirical science. The embryonic data acquisition systems created by the GM R&D group adided these efforts. An interview with Jim Hall by Paul Haney illustrates many of theese developemnts.

1

The Chaparral 1 was the first car to carry the Chaparral name and marked the transition of Jim Hall from an entrant to a constructor. Built by Troutman and Barnes, the Chaparral 1 was a conventional front-engined car, a development of the Scarab sport car first built for Lance Reventlow in 1957. Jim Hall raced it successfully through 1961, 1962 and 1963 while he created the design for Chaparral 2. As it was not a design owned by Jim Hall, other cars were sold to cut costs. It was the only Chaparral to be raced by someone other than Chaparral cars.

2

The Chaparral 2-Series was designed and built to compete in the United States Road Racing Championship and other sports car races of the time, particularly the West Cost Series that were held each fall. Following the lead of innovators like Bill Sadler from Canada and Colin Chapman who introduced rear engined cars to Grand Prix cars in Europe (where Jim Hall had raced in Formula 1), its basic design concept was a rear engined car.

First raced in 1963, it was developed into the dominant car in the series in 1964 and 1965. Designed for the 200 mile races of the sports car series, it was almost impossible to beat. It proved that in 1965 by winning the 12 Hours of Sebring on one of the roughest tracks in North America.

Read more at Wikipedia.org