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.
Hey Cecil. For this motor, the max thrust on a 3s lipo would be about 450 grams. Multiply that by 4 for 1800 grams total thrust. Unless you can build the quad for an all-up flying weight of 1/2 of that, these are too small for your quad. For great performance, you really need a 2:1 thrust to weight ratio. Estimate the weight of your quad's flying weight (select and estimate total of all parts) and look for a motor that can pull about 1000g thrust (or about 1/2 of your total flying weight). Hope this helps!
Update on motor, I contacted HK Customer support and sent them photo's of the defective motor, they refunded the cost of the motor in points(my choice) to my account, this was all done in less than 24 hours. Maybe HK is stepping up on the support, keep it up HK! Awesome.
5 thumbs up!
My setup : DIY p.b.f AUW : 300g Motor : 2730 1300kv(26g) Batt : 2s 800mah 20c Flight time : 7min @ 7.5volt (6min safely) TP mag8 12A Esc (9g) Prop : 9x6 SF : 8A @ full throttle Prop : 10x7 SF : 10A @ full throttle - slightly warm motor.
Great little Motor. I am using it for my 270gm J3 Cub. It is providing more than enough power. I am using both 2S and 3S Lipos. 3S I am using it with 8x4 props while the 2S I am using it with 9x7 props.