My son has had a phantom 3 standard for a few years It took a hard landing a while back and broke a prop. Put new props on it then, not sure of brand. It did want to take off. Motors sound a little sporadic. He put it up for quite a while and got it out this week. I know my son is not one to read a manual, but he used to fly it quite a bit. We recalibrated the drone and updated the APP. The drone will come off the ground, it is a little shaky, and hold a little altitude. It doesn't like to throttle down to land or shut off when at idle speed. I don't know if he ever tried an auto take off. It seems to be having some issues with inputs setting it back down. Trying to find a direction to go with trouble shooting. One motor looks to idle a little slower than the others but I understand that is not uncommon. I'm use to flying RC planes but I'm a lot more knowledgeable about these things than my son, which isn't saying much. Talked to my son again, he said he did get max rpm warming on the motors while only being at part throttle. Could it be possible if it had a bad motor and the others were trying to match thrust of the other 3 and maintain drone orientation could be causing the shaky takeoff and response problems. He also kepted it the back of his SUV a while after the crash. It has a ridiculous amount of large subwoofers and speakers. Grabbing straws.
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