RE: Which chinese factories make various brushless motor brands?
Here is the data for 40 size motors:
It seems that the: Turnigy SK3 4240-740kv, 10T isthe same motor as the: Hacker A40-10S V2 14-Pole, -which also has 10T and an almost identical Kv of 750.
<span style="font-size: medium"><u>40-SIZE MOTORS</u></span> (42 mm diameter)
(listed in order of weight, ascending Kv, and number of turns -descending), (LP =LiPolice)
(For Turnigy SK3: Stated "Can length" is 3 to 4mm longer than stator length, and can be used to identify stator length of each motor;
"4240" -size motor has 3520 stator; "4250" motor has 3530 stator )
(Turnigy SK3 40-size motors: Quoted length includes ~6 to 7 mm collet at back of motor; Actual length of the main motor body is ~6mm shorter than this )</p>
<span style="font-size: medium">182g
</span>Hacker 182g, A40-16S V2 8-Pole, Kv 1000, 16T, 8pole, D42 L42</p>
Hacker 182g, A40-12S V2 8-Pole, Kv 1350, 12T, 8pole, D42 L42</p>
<span style="font-size: medium">208g
</span>(these motors have 3520 stator)</p>
Hacker 208g, A40-14S V2 14-Pole, Kv 530, 14T, 14pole, D42 L42=Turnigy SK3 4240-530kv, 14T,D42 L50 (motor body has L43 )</p>
Hacker 208g, A40-12S V2 14-Pole, Kv 610, 12T, 14pole, D42 L42=Turnigy SK3 4240-620kv, 12T</p>
Hacker 208g, A40-10S V2 14-Pole, Kv 750, 10T, 14pole, D42 L42=Turnigy SK3 4240-740kv, 10T</p>
<span style="font-size: medium">246g
</span>Hacker 246g, A40-10L V2 8-Pole, Kv 1100, 10T, 8pole, D42 L42</p>
Hacker 246g, A40-8L V2 8-Pole, Kv 1300, 8T, 8pole, D42 L42</p>
<span style="font-size: medium">275g
</span>(these motors have 3530 stator)</p>
Hacker 275g, A40-14L V2 14-Pole, Kv 355, 14T, 14pole, D42 L52=Turnigy SK3 4250-350kv, 14T, D42 L58 (motor body has L52 )</p>
Hacker 275g, A40-12L V2 14-Pole, Kv 410, 12T, 14pole, D42 L52=Turnigy SK3 4250-412kv, 12T</p>
Hacker 275g, A40-10L V2 14-Pole, Kv 500, 10T, 14pole, D42 L52=Turnigy SK3 4250-500kv, 10T=Torque 4016T/500 500 Kv, D 41 L 50</p>
Torque 4014T/570 280g, Kv 570, 14T, D 41 L 50=FURY SA-40-14S, 270g, 570Kv, 14T, D 41 L 50</p>
Hacker 275g, A40-8L V2 14-Pole, Kv 630, 8T, 14pole, D42 L52
</p>