YoungRC 8.5 x 20mm 8520 Coreless Motor High Performance Brushed Motors for Micro FPV RC Quadcopter H107C + 55mm Blade Propeller Prop

This is a new technology for me. I thought motors are supposed to be heavier and lass power.... from my many years of playing with them.

Got motors today and had quad back in the air in less than 30 minutes. Worked perfectly. One of the clockwise motors on my potensic d20 quad stopped working. Potensic sent me a replacement quad but i wanted to see if i could fix the broken one. At $2.50 a motor i didnt have much to lose. I measured the motor, found the right size on amazon, and ordered these motors. The fit was perfect and the motor works flawlessly. Repair required removing five screws, removing a couple body parts, soldering off two wires, removing and replacing motor, reinstalling the body work and replacing the five screws. Too easy.

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Received 4 clockwise motors. Was supposed to come with 2 clockwise and 2 counter clockwise motors. Motors are tiny and at 5 volts didn't have much lift.

Bought because I wanted to add motorized helicopter to my train set. It was an easy install, and will run for hours if you hook up the battery