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Bracket racing is a form of drag racing that allows for a handicap between predicted elapsed time of the two cars over a standard distance, typically within the three standard distances (1/8 mile, 1,000 foot, or 1/4 mile) of drag racing.
'Rollout' is the distance travelled by a vehicle before the timing lights on a drag strip are triggered. … can affect the final run time by up to 0.3 of a second. … important to discount this first foot of movement from the final run time, to ensure that the run time captured by the GPS data logger is as close as possible to the official ...
Back half – the second half of a track, e.g. from the 1/8 mile to mark to the 1,000 foot or 1/4 mile mark for a standard track; Beam – electronic device (e.g. an optical beam) at the starting line to detect a car's staging position; Big tire – Car with a set of rear tires taller than 28.5 inches tall and or wider than 12.5 inches of tread.
Although a quarter mile (1320 feet, 402 m) is the best known measure for a drag track, many tracks are eighth mile (201 m) tracks, and the premiere classes will run 1,000 foot (304.8 m) races. The race is begun from a standing start which allows three factors to affect the outcome of the race: reaction time, power/weight ratio, and traction.
The term tractive effort is often qualified as starting tractive effort, continuous tractive effort and maximum tractive effort.These terms apply to different operating conditions, but are related by common mechanical factors: input torque to the driving wheels, the wheel diameter, coefficient of friction (μ) between the driving wheels and supporting surface, and the weight applied to the ...
Since one-foot rollout before the timer starts is used by some North American publications, times which exclude the time of the first foot of acceleration are included. [ 1 ] [ 2 ] [ 4 ] All times are independently tested and verified.
Tracks range from 1/4-mile (400 metres) to over 1 mile (1,600 metres) in length. The sprint format is a series of short-duration races, normally for a small number of laps, that qualify for a final which last 20 minutes or more, with a variety of point scoring calculations to determine the event's overall winner.
So, for example, if a route is 20 kilometres (12 mi) with 1600 metres of climb (as is the case on leg 1 of the Bob Graham Round, Keswick to Threlkeld), the equivalent flat distance of this route is 20+(1.6×8)=32.8 kilometres (20.4 mi). Assuming an individual can maintain a speed on the flat of 5 km/h, the route will take 6 hours and 34 minutes.