only way to know is to run it and check temps often. It'll spin that no problem, but the load, i.e. gearing will determine temps and whether the motor will last
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It's "Dr. _paralyzed_" actually. Not like with a PhD, but Doctor like in Dr. Pepper.
I am guessing it is a b50? I would go with a lower kv motor for 5s use. Like a 13l. The rotors on the b50 motors are not wrapped so the magnet may come off!