Originally Posted by Gerry__
Indeed, desert, and I have never, ever had an ESC that needed trim, as the calibration process takes care of everything.
Absolutely! but in my experience sometimes the TX sends just enough signal to trip the esc safety features.
When I started flying electric helis about 8 years ago I had the ole HBFP v1 you could never have any trim in your throttle or the heli wouldnt initalize. Also if you crashed and you had trim in your throttle the heli would do the chicken dance and you would smoke your 4n1 even though you chopped the throttle before impact.