A fixed angle of 50 degrees and velocity of 150 ft/s was selected. In the actual experiment, neither the velocity nor the angle could be controlled exactly, so the actual angle and velocity varied from shot to shot.
The ventilation fans were set so that to the extent possible all the air was blowing in from the outfield toward home plate, providing a headwind. After waiting about 20 minutes for the air flows to stabilize, 20 balls were shot into the outfield, and their distances were recorded. Additional variables recorded on each shot include the weight (in grams) and diameter (in centimeters) of the ball used on that shot, and the actual velocity and angle.
The ventilation fans were then reversed, so as much as possible air was blowing out toward the outfield, giving a tailwind. After waiting 20 minutes for air currents to stabilize, 15 balls were shot into the outfield, again measuring the ball weight and diameter, and the actual velocity and angle on each shot.
The data from this experiment are in the file dome data, courtesy of Ivan Marusic. The variable names are Cond, the condition, head or tail wind; Velocity, the actual velocity in feet per second; Angle, the actual angle; Ball Wt, the weight of the ball in grams used on that particular test; BallDia, the diameter in inches of the ball used on that test; Dist, distance in feet of the flight of the ball.