How do you figure that? Why not??? That's crazy
All of my (real life) models will turn off at *any* speed.
This Twister must therefore exceed 8 m/s even in a vertical climb then (as a 27 cell F5B probably would), 'cos there's no way I can turn it off once it's flying.
What it needs then, if there is no other way, is a *limit motor run* function.
In real life F5B, the motor is never run for more than a few seconds (at 80 - 100 Amps!).
RR