How to Calculate Peak Net Horsepower from Vehicle Weight and G-force?

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SUMMARY

To calculate peak net horsepower from vehicle weight and G-force, use the formula for power, which is force multiplied by distance over time. By applying Newton's second law (F=ma) with data from an accelerometer, one can determine the force exerted by the vehicle. This force can then be used alongside the vehicle's speed at the time of measurement to compute the peak net horsepower, which is essential for ensuring compliance with the 5 bhp limit for Motor Driven Cycles.

PREREQUISITES
  • Understanding of Newton's second law (F=ma)
  • Familiarity with accelerometer data interpretation
  • Knowledge of power calculations in physics
  • Basic understanding of vehicle dynamics
NEXT STEPS
  • Research how to interpret accelerometer data for vehicle performance
  • Learn about calculating force and power in physics
  • Explore methods for estimating frictional losses in vehicles
  • Study the regulations surrounding Motor Driven Cycles and their horsepower limits
USEFUL FOR

Automotive engineers, motorcycle enthusiasts, and anyone involved in performance tuning or compliance with vehicle regulations.

<3.7kw
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If I know the vehicle weight in pounds and I know peak G-force.
Can I find peak net horsepower? If yes, how would I do it?

I have an accelerometer on my “Motor Driven Cycle” and I have weighed myself and the cycle. To keep the cycle legally a Motor Driven Cycle it must be under 5 bhp. If I can get net hp I can account for the other relevant frictional losses to estimate bhp.

Thank you for any help you might give.
<3.7kw
 
Last edited:
Engineering news on Phys.org
Welcome to PF.

Power is force times distance/time, so if you use f=ma with the accelerator data you can find force, then you plug-in speed at the time of the measurement.
 

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