Quote:
Originally Posted by M_a_t_t
To find the change in drag that the template add-on would make using the pressure change would require him to
My summary: 1. Plot the pressure over the entire car. Then 2. integrate that data to see the change in drag. Then repeat those 2 steps with the modified version.
So it would be infinitely easier to just do throttle stop testing, which is probably why he suggested it.
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Even worse than that!
To find the change in drag that the template add-on would make using the pressure change would require
1. Plotting the pressures over the entire car in very fine detail (ie hundreds of readings)
2. Working out the horizontal resultant forces for each measurement
3. Integrating with respect to area
Far easier and more accurate to just measure total drag. Given that Vekke just wanted to prove/disprove a shape, simply pick a car where this is easiest done - ie one with a mechanical throttle. There's only a few billion to choose from!