PHOTOS COMPARING THE INSIDE OF THESE TWO MOTORS
Here are photosshowing the inside of the Turnigy SK3 3542-1000Kv and Hacker A30-12 L motors, after the front circlip is removed, and the rotating can is removed from the stator. -This now explains why their performance is identical,because
INSIDE (as you can see) -THESE TWO MOTORS ARE COMPLETELY IDENTICAL ...
a. They both have an identical 3020 stator -i.e. a stator which is 30mm diam, 20mm long. Both stators have 12 “arms” or “slots”.
b. The stator is wound identically for both, and with the same copper wire.
c. They have identical bearings.
d. They have a basicallyidentical 5mm shaft. (-The Hacker shaft is very slightly longer (67mm) than the Turnigy SK3 shaft (63mm) because the Hacker motor itself is slightly longer -due to the deeper rear housing. However, the length by which the shaft protrudes from the front of the rotating can (31mm ) is exactly the same in both motors. And the distanceofthe circlip goove from the front of the shaft is alsoidentical between these motors).
e. They have an identical diameter can, both made with exactly the same thickness aluminium
f. They both have 14 magnet “poles”, and the 20mm long magnets are identical in both motors.
g. AndBOTH of them motors have CURVED MAGNETS -i.e. magnets which are curved on their interior surface, which is the surface facing the stator (“Curved magnets” have always been a “headline marketing feature” of Hacker motors ...).
h. AndBOTH of the motors havedynamically balanced rotating cans -we can see this easily in pic 5, which shows the blue plastic deposits that are added during the can balancing procedure in the factory.
CONCLUSION: Once these two motors are taken apart, and we can see the inside (the “guts” of the motor… ), it becomes extremely obvious that the Turnigy SK3 and the Hacker A30 are TOTALLY IDENTICAL AND EXACTLY THE SAME MOTOR.
Of course, this is precisely why the two motors produced exactly the same performance on the Test Stand ...
It is worth making the point here, that of course -
we would never guess from the outside appearance of these two motors, that they are EXACTLY the same inside and that they have exactly the same performance (-and especially because the Turnigy costs $27, whilst the Hacker is $101… )
-And of course this is precisely why allthe 20 or 25 or 30 different “SunRay Tech motor brands” all have a slightly different outside appearance. It is to try and prevent us realising that these motors are, in reality, all exactly the same on the inside.
-Clearly, the SunRay factory and also the re-sellers of these SunRay motors (-like Hacker, Extreme Flight, Common-Sense-RC, BMI-Models,etc etc) do not wish us to realise that Hyperion-Z,Gens Ace, Turnigy SK3, LiPolice, OK Hobby Infinite, Pelikan Foxy,Common-Sense-RC,BMISpitz, motors -are all, in fact,totally identical to Hacker motors, and to Extreme Flight Torque motors... (-on the inside ...)
But the fact is, they all are ….
Pics show: 1, 2, 3, Stator and windings of the 2 motors;Turnigy SK3 on left, Hacker on right; 4, Inside of rotatingcan; Turnigy SK3 on left, Hacker on right;Both motors have magnets which are curved on theinner surface; 5, Rotating can of both motors, to show that they are bothdynamically balanced (note blue plastic deposits between the magnets; Obviously, the Hacker is the purple one ..The actual
can part is the same forboth Hacker and Turnigy SK3 -it is just that the Hacker has a wider rear end housing than the SK3.
6,Closeup view of the front housing of both motors
