Rotor dimension calculator
by Mark Hayton

Dimensions In Cm
Pitch diameter big gear
Pitch diameter small gears
Gear axis spacing
 
Rotor magnet diameter
Magnet overlap %
Magnet to rotor-edge thickness  
Radius calculations
Small rotor magnet radius
Small rotor radius
                 diameter
Large rotor magnet radius
Large rotor radius
                  diameter (constant )
Verification summary
Large:Small magnet radius ratio
Percent magnet overlap