An easy tool to calculate the main rotor speed of an electric RC helicopter. It allows you to play with the parameters to match you needs and i.e. select a new pinion for an new/other motor. Supports currently only simple conversion (pinion/main gear) setups in _governor_ mode.
Includes an option to calc the required pinion by simply entering the desired head speed.
This is a Basic version, it displays Ads on the top of the screen.