Smooth Ball and Bald (No Felt) and Standard Tennis Ball - Tunnel Set-Up

Smooth Ball in the Tunnel - First, the Team Calculates the Drag Forces on a Smooth Ball and Compares the Results to Known Test Results - We Have to Match the Known Results Before We Continue

Tennis Ball

First Tennis Ball Placed in the Tunnel

Bald (No Felt) Ball

Bald Tennis Ball in the Tunnel

Close-Up of Bald Ball - Note the Seam Down the Center of the Ball - The Seam Should Create a Turbulent Flow

Bald Tennis Ball in the Tunnel