Determining Motor Speed?

[45Auto]

Our dual 775's running through cim-u-laters freespin our 8" wheel up to just over 3600 RPM, as measured with a photo-tach. Works out to about 125 fps, or 85 MPH. We use around half power to shoot from the key, but since we're using a single axle we only get half the wheel velocity as ball velocity (the rest is backspin).

At full power it's max range was right around 30 feet. We're using a high angle fixed hood, so it's not optimized for max range.