I'm with KC on the bind/set failsafe @ -150% but I always use -100% to +100% after that.  Works fine on every radio I've tried and for thousands of runs.</p>

The manual is the result, over the years, of people having trouble getting the failsafe set right, mostly, probably, because folks didn't change the low throttle end point before binding and then found they had to change the range after.  Many newer radios allow you to set the throttle failsafe point in the Tx so you can set it once and forget it.</p>

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