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Props Off on the Bench Sticker
Every pilot learns this rule once. Usually the hard way.

Details
Most pilots never test their failsafe until the day they need it. On the bench it takes ten seconds: props off, arm, switch the radio off, and the motors should stop within about two seconds. If they keep spinning, the quad would keep flying with no signal, so don’t fly it until it’s fixed.
Written for quads with the default drop failsafe. If you set up GPS Rescue or return to home, the motors are meant to keep running.
A black and white checklist with the last line in red. Stick it on your radio, your bench or the field box.
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