In October 1950 a 12-hour race combined for SportsCars and Saloon Cars was held at the
Brno circuit
The Masaryk circuit ( cz, Masarykův okruh) or Masarykring, also referred to as the Brno Circuit, refers to two motorsport race tracks located in Brno, Czech Republic.
The original street circuit was made up of public roads, and at its longest m ...
.
The race organizers created an interesting and unique mathematical formula (the so-called power output indicator) to equalize the potential of all cars. The formula was based on a predetermined average speed that differed for cars with various engine capacity, and the corresponding distance expected to be covered by each car over the 12-hour period. The actual distance traveled by a car was then divided by this expected distance to arrive at a
quotient
In arithmetic, a quotient (from lat, quotiens 'how many times', pronounced ) is a quantity produced by the division of two numbers. The quotient has widespread use throughout mathematics, and is commonly referred to as the integer part of a ...
, and the results were based on the values of this quotient. Consequently, even cars with the smallest engine size could win the race if they reached sufficient distance, while anybody failing to complete the expected distance was not classified at all. The calculation was further complicated by a provision that any lap completed below the projected average speed was not counted toward the total traveled distance.
Consequently, the overall winner was Treybal with saloon
Bristol
Bristol () is a city, ceremonial county and unitary authority in England. Situated on the River Avon, it is bordered by the ceremonial counties of Gloucestershire to the north and Somerset to the south. Bristol is the most populous city in ...
, who reached a quotient of 1.268 while travelling 1121.158 km (4th longest distance). The pair Pavelka/Zd. Sojka with
Tatraplán Sport covered the longest distance of 1192.933 km but their quotient of 1.098 was good for only 14th place in final classification. The race was seen as a great success, yet initial plans to hold a 24-hour race in the following year and thus establish an endurance racing tradition in Brno were eventually abandoned.
24H Series
In 2015 the 24H Series returned to the Brno circuit for a 12-hour race, called the 12H Epilog Brno. It was the last race of the season.
See also
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Brno 2 Hours 30 Minutes
The Brno 2 Hours 30 Minutes was a sports car endurance race held at the Automotodrom Brno in Brno, Czech Republic. The race was first held in 1988 as a round of the World Sportscar Championship. It was revived in 1997 for the International Spo ...
References
[Svět Motorů magazine, Nos. 91, 92]
{{Automobile endurance races
Endurance motor racing
Auto races in the Czech Republic
Brno