RPM / V：1800kv
Unit Weight (g):
Dvouplopnk z EPP rozpt 500mm, vha 195g uveze pohodln s 2S LiPo a vrtul 8x4E.Very small in size, includes 3 motor mounts & pre-soldered connectors .
Prop has to be connected with included prop saver. There is no other way to mount props as shafts do not extend past motor, so keep that in mind.I just finished a rough static test on my bench here of my friend's SK3-2122-1800kv.
Overall, the motor is small, but packs a pretty big punch. Good solid feeling magnets. The only odd thing is the back of the motor has a screw and self-locking nut (the kind with nylon built into them to keep it from coming off). I'm not sure what that's all about, but the built in prop saver works fine. I didn't have to unscrew the set screws to get the o-ring on, but did have to stretch the o-ring to slip it under the screws. No biggie there.
As noted in the Discussion section, the best prop for 2S operation does appear to be an 8x4 which in my tests gave 230 grams of thrust @ 6.7 V, approx. 46 Watts input power, and approx. 7A input current.
I also tested using a 3S setup and for thrust, the best (of the props I had) was a 5.7x3 which yielded 157 g of thrust @ 4A, 50W, 12.3V.
Here's my numbers:
V : prop : Watts : Amps : Thrust
6.7 : 8x4 : 46 : 7 : 230 g
6.x : 7x6 : 54 : 7 : 215 g
6.0 : 6x5 : 41 : 6 : 153 g
12.25 : 5x5 : 70 : 5.6 : 75 g
12.3 : 5.7x3 : 50 : 4 : 157 g
**NOTE** the above numbers are _rough_ and not meant to be scientifically accurate! They are static and eyballed. Just to give you an idea of what one hobbiest has seen with this motor.
I hope someone finds these number useful. I like the motor. Would be good on a 100 - 150g plane I'd say... doing 3D. Or for sportthis motor has extreme vertical climb power !!!!! i run on it 2s 20c 610mah rhino pack and it give me around 9 minutes of hard 3 d flying and i use 8x4 gws prop it has more power then original hacker but it drain the battery more then hacker motor but power is awsome!!!!!!! recommendo