Use this applet to determine your settings, then run the other applet to display the effect of these settings at various propeller rotation speeds.

The upper display shows the bullet impacts (red and green) and triggers points (small black dots) on the propeller disk area. The red areas are the propeller blades, the green areas the trigger zones, and the blue areas indicate where bullets are expected to land.

The lower display shows the rate of fire. For every projectile, the inverse of the time between it and the previous projectile is plotted. The full vertical scale of the display corresponds to the maximal rate of fire.

If you don't see the applet running, then download the Java runtime environment and Applet Plug-In first. This applet uses Swing components, so it may not work with older browsers and plug-ins.