The air drag constant for different nose shapes of projectiles is determined with the help of a simple method combining a projectile launcher, video tracking technique and spreadsheet computer code for simulating the motion. A projectile launcher with low-cost components is developed to study air drag in projectile motion. The launcher is based on air pressure and is easy to modify for different projectile types. The projectile motion is tracked using a video camera connected to a computer. The trajectory of the motion is then simulated with the help of the spreadsheet, and the air drag constant is adjusted to fit the observed data. The minimum error is used as the criteria for the best fitted air drag constant. Three types of projectiles, i.e.: conical, round, and cylindrical shape, are used in this experiment. The obtained air drag constants are in the range of 0.025-0.134. The conical shape has the lowest air drag constant as predicted.