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Turnigy Aerodrive SK3 - 4240-740KV Brushless Outrunner Motor

Turnigy Aerodrive SK3 - 4240-740KV Brushless Outrunner Motor

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$35.43
Rating:
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Weight:
339 g
SKU:
SK3-4240-740

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Product
Description

Turnigy SK3 Motors are the next leap forward in motor quality and design. We instructed the engineers to source the best quality magnets, bearings and materials available to them and develop a motor that would not only rival but surpasses the quality of many leading motor manufacturers on the market today.

The result is an efficient, high caliber motor using quality double shielded bearings, sintered Neodymium magnets and a string wound stator ensuring an accurate and consistent winding each and every time.

The Turnigy SK3 motors are suited to modelers who are seeking a quality brushless motor without compromise.

Specs.
Turns: 10T
Voltage: 4~5S Lipoly
RPM/V: 740KV
Internal resistance: 0.013 Ohm
Pole Count: 12
Max Loading:50A
Max Power:870W
Shaft Dia:5.0mm
Bolt holes: 25mm
Bolt thread: M3
Weight:195g
Motor Plug: 3.5mm Bullet Connector

Product
Specifications

Additional Information

  • SKU:
    SK3-4240-740
  • Brand:
    Turnigy
  • Weight(g)
    339.00
  • Length
    140.00
  • Width:
    40.00
  • Height:
    65.00
  • Kv(rpm/v)
    740.00
  • Max Currents (A)
    50.00
  • Power (W):
    870.00
  • Length B (mm):
    48.00
  • Can Length D(mm)
    23.00
  • Max Voltage(V)
    19.00
  • Shaft A(mm):
    5.00
  • Unit Weight (g):
    195
  • Diameter C(mm)
    42.00
  • Total Length E(mm)
    70.00
  • Resistance (mh):
    13.00
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Quality motor let down by the screwed on monkey metal prop driver but I still rate these motors highly.
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Very good motor,but the prop adapter is really short and the prop adapter broke while I was trying to fix tight my prop on the motor
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zeer goede motor veel power in de citabria
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Guter Motor zu einem absolut tollen Preis. Habe ihn in einer AT-6 von VQ Model verbaut. Erstflug steht noch aus.
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After 5 years of running HK motors, this one failed. Max static amps was limited to 50. Third flight the airplane slowed. Landed it and the motor was hot! I took it apart and a magnet had come loose and ground itself up. All the HK motors I have used, I have not had a problem by limiting max static amps. Thus I rate the motor high, the value good, but in this isolated case, poor assembly quality. The motor had to be defective form the manufacturer and HK, being nice people should at their expense replace it.

Okay, having said that, I ordered a new replacement motor form HK along with other parts. Over 5 years using HK motors and ESC's, I have now had one motor failure which I believe to be a manufacturing defect. Thus, I am continuing to use HK products and I have and use many HK motors and ESC's and recommend them to friends as good, inexpensive, reliable hardware.
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I put this motor in a Dynam P47. The motor mount requires some slight modifications, which I did with a Dremel tool. I only need one-half throttle for most flying. With full power, I have unlimited vertical. acceleration is smooth and easy to set up ESC, which I use an 80 amp ESC.
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Shaft on prop adapter broke the first time I tightened it. I am certain I did not over-torque it. Ordered new accessory kits. Only available at global warehouse.
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Tested on brand new TGY 5S 3000mah 30C (fully charged)
1, 11x6 Cam Carbon (Aeronaut) 2780g Thrust, 38Amps, 770W
2, TGS e 11x10 2830g Thrust, 48Amps, 930W

I needed thrust around 2300g so goal achieved. 11x10 prop should give my MP Tucan brutal speed. Cant wait to maiden!
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I bought this for my Maxford GeeBee E, which is a 3 lb., 10 oz. plane. I've got a 14" wooden prop on it and this motor does the job well. It gets hot, but not "burn my fingers" hot. I could keep it cooler, but this plane looks it's best going fast. I'm very happy with the motor. (I meant to give it all 5 crowns above, but accidentally hit the 4. Sorry about that)
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4 Crowns because the 2nd one I received had total different specs. Most likely it became the wrong sticker and is 500kv or so.
The first SK-3 4240 740kv has 48amps with 5s and 10x7 APC prop.
The second SK-3 4240 740kv had only 33amps with 5s and 10x7 APC prop.
The faulty one I did send back, so awaiting replacement motor from HobbyKing.
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