Cd/Crr vehicle drag coefficients chart - you need javascript enabled to see it

* Write your coastdown data in first two columns
* Click on first PLOT button to plot experimental data chart
* Press calc&plot to plot calculated-data chart
* Tune A and B parameters until the blue curve best fits the red curve
* Read resulting values for Cd and Crr.

Vehicle data Mass (kg): Frontal area (m2):

Coastdown data Experimental Model X Y (m/s) Y (km/h) Y (m/s) A: B:

Results

Idea and initial data from: http://www.instructables.com/id/Measure-the-drag-coefficient-of-your-car/

Credits: http://www.physicsforums.com/showthread.php?t=740343

Chart mad by jsCharts

Physics explanation

Comments: cassioli at libero dot it