Repair Predator FPV drone.

Started using a new Predator.  Had a small hard or crash landing.  Now I cannot get equal or consistent power to all blades.  I’ve repeated the set up process several times but only get power to 1, 2 or 3 blades, not 4.  Then, the 4th blade turns a little but not consistent. What may the problem be?

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if it is the same blade every time, perhaps the motor axis is bent or the blade itself is broken

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Can I fix that and how

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try to spin the fourth and the third for example motors with your hand then compare the force that you applied between them.

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