With the Hobbywing the ESC has to be calibrated to suit your Tx (unlike the Castle where you asjust the Tx to suit the ESC)
The procedure for this calibration is in the instructions but basically:
- Start with everthing turned off, those of nervous disposition might choose to remove blades (though the motor should not start)
- Turn on Tx, set a linear 0-100 throttle curve and fully open the throttle (throttle hold must be released)
- Plug in heli battery
- Listen for a double beep, when you hear the double beep fully close the throttle
- ESC will give normal arming tone
- Calibration is complete
Now re set your throttle curve to what you need for flying and you are ready to go.