- #1

golfz

- 17

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How do you calculate the drag coeficient of a golf ball without the use of a wind tunnel. I have been researching this for hours and have not found a solution. The equation for the drag coefficient involves a value for drag which I cannot find out. I need to find the drag force to find the drag coefficient. I am stuck with finding out the drag force.

Fd= 0.5Pv²CdA

Where P is the density of the air, v is the velocity of the ball relative to the air, A is the cross-sectional area and Cd is the drag coefficient (the value to be found).

I am sure there is a method besides using a wind tunnel. I have a machine which can caluclate initial velocity, rpm, air density etc. It even simulates the distance the ball would fly. Does anyone know how I would be able to calculate it so that I could get a graph like this: