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Rollout comes from the drag strip. When you start a quarter-mile run, the timing lights don't start until the front wheel is all the way over the starting line. … approximated by subtracting the first foot of an acceleration run. Now a common substitute is to cut the first 3 mph from a run, cutting as much as 0.3 seconds off the time.
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.
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.
As with land-based drag racing, competitors race their vehicles for the lowest elapsed time (low ET) over a straight race course of a defined length. There are three standard drag race course lengths, 660 feet (1/8 mile), 1,320 foot (1/4 mile), and the most common length, used in professional drag boat racing, 1,000 feet (3/16 mile plus 10 feet).
1/4 mile: NHRA Camping World Drag Racing Series: Keystone Raceway Park: New Alexandria: Pennsylvania: 1968: Asphalt: 1/4 mile: Kil-Kare Raceway: Xenia: Ohio: 1959: Concrete: 1/4 mile: Las Vegas Motor Speedway
Motorcycle drag racing (also known as "sprints") involves two participants lining up at a dragstrip with a signaled starting line. Upon the starting signal, the riders accelerate down a 1 ⁄ 4 mile (0.40 km) or 1 ⁄ 8 mile (0.20 km) long, two lane, straight paved track where their elapsed time and terminal speed are recorded.
This division has specific rules about engines, components, bodies, etc. Pro Modifieds can either be raced on 1/4 mile or 1/8 mile tracks. Usually, the NHRA races Pro Mod cars on the 1/4 mile, resulting in high 5 to low 6 second passes, while the PDRA races strictly on 1/8 mile track setups, allowing for high 3 second-to low 4 second passes.
Drag is a force that acts parallel to and in the same direction as the airflow. The drag coefficient of an automobile measures the way the automobile passes through the surrounding air. When automobile companies design a new vehicle they take into consideration the automobile drag coefficient in addition to the other performance characteristics ...