Hobby king provides good average quality for the price of the item, but beware that, despite what they say, practically there is no warranty.
If you have a problem they ask evidence (photo and/or video), which usually require motor disassembly* at that point they say (testually) "I am sorry you should not have dismantled the item.
This has voided the warranty." even if you did provide evidence that the motor was faulty.
Power Density at a cost. I put 2 on my 40" twin and performance was very good. Unfortunately a crash caused crushed wires in my stator (it's dead). These have too little clearance internally and the rotor hit the windings. Most other motors have a clearance that makes this impossible... It appears there are many fates to befall these wee beasts.
Very good motor! Prop GWS 8x4 3s-610mAh, with flying time about 6 minute. The punch is higher when using 30C
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I bought 2, used one to replace a geared 5:1 brushed 280, the other to replace a geared 5:1 brushed 370. This motor is about half the weight of the motors ithey replaced. Used a 25 amp brushless esc (I already had them) This motor likes 3s with a 9.47sf prop the best about 7000rpm, 120 watts about 21 oz thrust. 3s 10.47sf prop about 5000 rpm, 155 watts, 20 oz thrust and gets a bit too hot (for me). Mine had the second e-ring grove so I could put the shaft out the other side. Support the hub near the shaft when pressing out the shaft or you will have to get 2 small v block and a dial indicator to straighten the bell.
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I have put given motor ADH300L Brushless Outrunner 1100kv on Kinetic 600. The axis has been turned concerning regular position. It is necessary to pierce deepening in an axis under the screw a fixing rotor. Holes have approached ideally. Flies Kinetic with this motor very well, draft suffices for launch vertically upwards. The controler 18A is heated with the given motor, I have put turnigy 30А, it isn't heated Я www.link данный мотор ADH300L Brushless Outrunner 1100kv на Kinetic 600. Ось была www.link www.link www.link www.link www.link www.link www.link в оси под винт www.link ротор. Отвер