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Quarter Mile Speed Formula:
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The quarter mile speed formula calculates the estimated speed of a vehicle at the end of a quarter mile (1,320 feet) drag strip based on the elapsed time (ET). This formula is commonly used in motorsports to estimate terminal speed.
The calculator uses the quarter mile speed formula:
Where:
Explanation: The formula provides an empirical relationship between elapsed time and terminal speed at the end of a quarter mile drag strip.
Details: Quarter mile performance is a standard measurement in motorsports that indicates a vehicle's acceleration capabilities and overall performance. Both elapsed time and terminal speed are important metrics for comparing vehicle performance.
Tips: Enter the elapsed time in seconds. The value must be greater than 0. The calculator will provide the estimated speed in miles per hour at the end of the quarter mile.
Q1: How accurate is this formula?
A: This is an empirical formula that provides a reasonable estimate for most vehicles, but actual results may vary based on vehicle characteristics and track conditions.
Q2: What is a good quarter mile time?
A: Performance varies by vehicle type. Sports cars typically run 12-14 seconds, while high-performance vehicles can achieve times under 10 seconds.
Q3: Does this formula work for all types of vehicles?
A: The formula works best for typical automobiles. Extreme performance vehicles or those with unusual power-to-weight ratios may show variations.
Q4: Why is terminal speed important?
A: Terminal speed indicates the vehicle's power and aerodynamic efficiency, while elapsed time shows acceleration capability.
Q5: Can I use this for tuning my vehicle?
A: This calculator provides estimates for comparison purposes. For precise tuning, actual track testing with professional timing equipment is recommended.