4pcs USAQ 5010 Brushless Motor 360KV 2-6S High Torque for 14-18 Inch Propellers

So I'll write in that I bought these whilst waiting on a larger shipment of these to arrive from somewhere in China via ebay, so I was hoping for a preview of the motors I'd be working with for a project that required high-torque bldc motors of this diameter. I'll just be as honest as I can right now: These are nothing like the Gartt 5010's you might come across, but sorta close. The funny thing is, these are actually up to the specs of a 50mm dia and 10mm height bldc motor, but the the problem is just about everything else that is marketed as a 5010 bldc is 50x10 PLUS thicker gauge winding and a much more robust frame. HOWEVER: I bought these with the reasoning of their slim profile specs, but the problems I'm experiencing on day 1 are mainly torque...I can stop these motors at full throttle with my bare fingers and it's not a challenge. Granted, I'm using a 35a 1-5s ESC in my tests, but I've been completely unable to get a stable function out of this batch with another 40a ESC that works just fine with other motors. So I'm not really sure what to say here except they may not be either a.) that good at all even though they seem to look nice - or - b.) they are very picky BLDC '5010' motors with frequencies... Still mucking around with the esc firmware and driver electronics, but I'm not feeling particularly great as a first experience with these motors. ** These seem to be of generally decent build quality, don't get me wrong, but they don't seem to perform anywhere near the ratings they are advertising... I can honestly see why these are white label motors. REALLY hoping the rest of them I bought on e-bay are going to be of a different QC or wire stock, because I suspect they didn't do a great job on this batch that only had one in stock and one review since 2018 (at the time of writing it is July of 2020) SELLER: If this doesn't seem right, please let me know if this is abnormal and I'll be happy to update this review but this is just an honest first impression.

They are great looking units and preform very well. They have ends, shrink tube, propeller mounts - a complete kit. Build quality looks great and they preformed well with both Arris and Bel Heli ESC's.I wish I could find more info on them. No site, no manual - Nada. They are sold as USAQ but branded FlyCat i-Rotor. Very hard to tell. Maybe a rebrand. If the seller sees this I hope they respond because I am interested in over 100 of them.So yes. I do recommend them.Also, I bought them from my other account so I did get them from amazon even if the "verified" buyer doesn't appear.