Readytosky2212 920KV Brushless Motors CW CCW for F330 F450 F550 S500 S550 X525 DJI Phantom Quadcopter(4PCS)

I have purchased this set of motors twice now. The first set went towards a 9" quadcopter and those motors worked flawlessly. I especially appreciated that the motor shaft was very thick and so it never bends during any sort of crash. This did require me to drill out the hole in my prop, but well worth the extra durability in my opinion.My second batch of motors wasn't as good, as one of the motors was dead on arrival. I did not use the motor until 2 months after my purchase, but I reached out to Readytosky through the Amazon Customer Service Chat and they send me a new replacement motor. The new motor arrived within a week of my notifying them of my issue, which was very nice. For additional information, the ad motor I received would not spin up fully when connected to a known-to-be-good ESC. It would start spinning slightly, but never go to the full speed as one would except. The replacement motor worked perfectly however.All in all I think these motors are a pretty good deal, especially knowing that Readytosky will replace a faulty motor should you receive one.

The media could not be loaded. I love my new bright red motor. It has the power to lift a large drone I'm building with a 1045 prop and a 40amp esc (might be a little overkill), but the windings look nice and tight with a very thick wire that looks like it can hold a lot more current than it's rated for. Also, the bearings on the look great; they have a very smooth feel, and the casing is a thin light aluminum, which is ideal for people who like to fly their drone on the edge (it makes me feel better than saying crash a lot).

Motors are ok. I am using 4x of those for my X525 Frame with 10x45 props.*BUT* Had to re-solder two motors connectors (total 4 connectors fixed), they came with a really bad solder job, I could tell whoever did the cut of the insulation prior to solder, also did cut 4 of 5 conductor threads. So those two motors had no "punch".Made me lost maybe 4 hrs, after checking/recalibrating ESC's, Removing heat shrink (which by the way was correctly installed, hiding the problem)After the solder job, Voila!Honestly, I don't know if will order again, still mixed feelings, the motors have endured a pair of very ad crashes without any damage. Maybe luck ? Maybe they are sturdy?

Everything came as described and looked okay, good quality feel, All motors rotate as they should and spin nicely, shafts are all straight and the motors tested good for me! I feel like these will work great on the frame there going on. Fitment is nice when mounted as well. Great value for a set of motors of this quality!

One of my motors came broken but the seller replaced it quickly. One thing to look out for is the propshaft is way too large for most propellers so you would have to use the same company's 1045 props. Also make sure you have your own screws because those arent supplied.Otherwise, the motors deliver good power and are excellent quality. They worked well in my Eclipson Model A 3d printed plane which i crashed into many pieces

I installed a set of these on my Phantom. The motors did not feel the same when spun by hand. When powered up one had an odd sound to it. The quad took off and immediately spun out of control and crashed. I pulled the motors out and reinstalled the original ones. It flew perfectly. Not recommending due to quality. You may have better luck.

I have just set these up on my S500 frame and they are working nicely. I am using 1045 props right now but am looking forward to experimenting with other prop sizes to find the right balance that I am looking for. Just be aware that these are DJI keyed shafts so keep that in mind when choosing props. Overall, I am impressed with the quality in workmanship and definitely recommend these.

Motor weight with wires = 54gThrust test results with dji 8045 props on 4s.2a 35w 145g3a 50w 200g6a 100w 335g9a 150w 450g14a 225w 580gThese seem ok for continuous use at 225w. Motors were not hot after 1 min at 225w.Quality is ok. One bearing had higher resistance out of the box. Bells are not 100% true.