<span style="font-size: large">NOW:THE BIG QUESTION: -</span><span style="font-size: medium">HOW does the Turnigy SK3 3542-1000Kv COMPARE with the Hacker A30-12 L motor ?</span></p>


<u><span style="font-size: medium">MOTOR TEST:</span></u><span style="font-size: medium"> Turnigy SK3 3542-1000Kv-</span>Supplied by: HobbyKing (HK): Price $27.76
(-Compare with price of the Hacker A30-12 L motor -which costs $ 101.53 in Europe (=&pound;66.20); -and $66.99 in USA )</p>

<span style="font-size: medium">I WILL GIVE THE BOTTOM LINE ANSWER </span><span style="font-size: small">TO THE MAIN QUESTION, RIGHT AT THE START OF THIS MOTOR TEST:
</span> -As you will no doubt see below, from this careful, objective and rigorous test:
<span style="font-size: medium">The Turnigy SK3 3542-1000Kv turns out to be <u>A TOTALLY IDENTICAL MOTOR</u>- in every single way -to the Hacker A30-12 L motor</span><span style="font-size: large">.</span><span style="font-size: small">
-Indeed, all the scientific testing and all the de-construction of the motor carried out in these tests, shows that underneath the outer case, the Turnigy SK3 is actually the EXACT SAME MOTOR as the Hacker A30-12 L </span>(-they are both, of course, made side-by-side in the same SunRay Technology factory in Shenzhen ...).
-Indeed, as you will also see, <span style="font-size: medium">the Turnigy SK3 - in some respects - is actually a better motor than the Hacker &hellip;!</span>
-The only real difference between these two motors is that the Hacker is purple on the outside, whilst the Turnigy is chrome ...

<span style="font-size: medium">-And let us also note, once again: The Turnigy SK3 3542 only costs 27% of the totally identical Hacker A30 motor &hellip;</span></p>

<span style="font-size: large"> Read on &hellip;</span></p>


<span style="font-size: medium">MOTOR TEST: Turnigy SK3 3542-1000Kv:
</span>Motor Weight:141g (HK data)
Rated Kv: 1000 (HK data)
Max current: 45A; Max power: 670W; Internal resistance: 31milliOhm;(HK data)
External dimensions:diam 37mm, length 44mm(HK data -despite D37, L44, HK still call it a "3542" motor) (-some retailerscall ita&ldquo;3742&rdquo; motor)
Stator size:diam 30mm, length 20mm (-some same-size motors arecalled a &ldquo;3020&rdquo; motor on basis of stator size)
No. wire turns: 12 (12T); Stator arms: 12; Magnet poles: 14; Length of magnets: 20mm (i.e. same as stator length)
Shaft diam:5mm
X-Mount (black) weight: 5.1g; Hub Prop adaptor (bolts to hub on rear housing) weight: 10.2.g; Prop driver (collet-type which attaches round shaft) weight: 11.3g</p>

MANUFACTURED BY: SUNRAY TECHNOLOGY: http://sunraytechnology.com/
Retailer / Re-seller website: HobbyKing:
http://www.hobbyking.com/hobbyking/s...ner_Motor.html</p>

Measuring equipment used: -Exactly same as for Hacker A30; No need to repeat.</p>

Description of motor:
The Turnigy SK3 3542-1000Kv motor, with wires and 3.5mm connectors, weighed 141.1g. The motor has a 12-arm stator (Retailer states: wound with 12 turns, 12T) and 14-magnet poles. Externally, it is 37mm diameter; the main motor body is 36mm long, and with the 11mm diam hub on the rear housing, it is a total of 43mm long (see pics).Thesupplied hub prop adaptor fixes around the hub with 3 small cross-head bolts (also supplied). The actual rotating can (i.e. the chrome cylindrical part which hasmagnets fixed to its internal surface) is 22mm long-exactly the same length as for the Hacker purple rotating can.The rear motor housimng extends back for 3.5mm from the can(see pics). Motor came fitted with 3.5mm male connectors. The 4 mounting holes on what I will call the "front" motor housing are 3mm thread at 25mm centers (these are for fixing the X-mount). The motor has a 5mm shaft, of which 21mm protruded from the "front&rdquo; housing and on which the supplied collet-type prop adapter can be fitted.
-One of the "give aways" of being a motor manufactured at the Sunray Technology factory -is a brass washer and retaining black horse-shoe circlipon the shaft just outside the front housing -and of course this Turnigy SK3 motor has this feature.</p>

Standard procedure: Same as for the Hacker motor; No need to repeat.</p>

Standard Motor Test Procedure:
-Exactly same as for Hacker; No need to repeat.
I wanted to get this motor test completely correct, with no possibility for error. So I actually made 4 runs in this motor as well, so that I could be totally confident of the results. All 4 runs gave readings which were almost identical. Therefore, I am very confident of these results.


Pics show: 1,2, Turnigy SK3 3542 box and packaging; 3,4, Turnigy SK3 3542-1000Kv motor with supplied accessories;5,6, Turnigy SK3motor mounted on the Test Stand.




























</p>