Aerodynamic and Rolling Horsepower Calculations By Bowling & Grippo

The following calculates the aerodynamic horsepower loss in propelling a vehicle with given coefficient of drag, frontal area, and speed. Also calculated is the horsepower loss due to rolling friction from a given vehicle weight and speed. Click here for a chart of coefficients. As an added bonus (and who could not use an added bonus), a calculation for the vehicle front-end lift force is performed, derived from the coefficient of lift input.

Program Inputs:

Coefficient of drag:

Frontal Area (Square Feet):

Test Temperature in Degrees F:

Test Barometric Pressure in Inches Hg:

Vehicle Miles Per Hour (MPH):

Vehicle Weight in Lbs:

Tire Inflation Pressure in psi:

Vehicle Coefficient of Frontal Lift:

Press this button to submit a computation: .

To reset the form input: .

Bruce Bowling
Al Grippo