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From 1922 to 1925 inclusive was used racing formula, which determined the maximum displacement under 2 liters minimum vehicle weight 650 kg. In the four years of existence of this formula car factories produced many new and improved cars, two-liter engines have achieved a high degree of development. Norma mass was introduced in order to preserve the similarities between racing and transport vehicles. This precaution proved to be largely unnecessary, because while making ultra-light structures have not been studied and the construction of a car weighing less than 650 kg was a great difficulty. Almost all cars had a lot of 50-100 kg overweight. The exception was a racing car 'Fiat 804', which not only corresponded to the minimum allowable weight, but also for many years remained an exemplary design, both in external form, and on the device of the engine. To copy European and American firms. Major design changes over the period of two-liter formula - go to the 8 - and 12-tsilipdrovym engines and compressors used for forced feeding of engines, which gave a significant increase in power.
In 1926-1927. Recognized expedient to reduce the maximum displacement to 1.5 liters and a modest increase in the minimum mass. Limiting displacement between 1914 and 1927 was the main reason that caused the rapid growth liter capacity and speed of racing engines. Liter capacity has grown from 25 to 100 liters. i.e., the rotational speed from 3000 to 7000 rev / min.
A small number of competitors in the race, 1926, and 1927 forced to abandon the 1.5-liter engines and limit in 1928, a lot of cars outside 550-750 lbs. This replacement has expanded the range of possible participants as well as a 2-3-liter cars fall into this interval of mass, approved rules.
Racing 1928-1931 year were marked by a noticeable superiority of the automobile, "Bugatti", almost all more or less important races were won by this famous French company. |
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