Turnigy Aerodrive SK3 - 4240-740KV Brushless Outrunner Motor

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Hobbyking needs to sell parts for its motors

Jan 06, 2022

I love this motor, but despite being sold for 2+ years, the spares for it remain out of stock. Hobbyking, please support your motors. Otherwise, I love these motors.

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Disappointed

Nov 27, 2021

Don't know whether this motor is any good, snapped the prop shaft drive, and have been waiting 3 months for replacement which is still not in stock

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Runs quietly

Nov 08, 2021

I’ve bought this motor twice now. It runs well and unusually quietly.

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Yes

Nov 08, 2021

OK!

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Excellent motor

Jun 23, 2021

Ordered 2 . Worked as advertised.
Have used in past & will continue to use in the future!! Excellent, budget motor!

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Great service

Jun 14, 2021

Very good product & service great stuff

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TURNIGY AERODRIVE SK3 - 4240-740KV BRUSHLESS OUTRUNNER MOTOR

Feb 05, 2021

did earlier review on this, did wrong motor. this was put on a pt17 with 44 in wing span. works well on 4s 5000 60c battery esc 80 amp swinging an 10x7 3 blade prop

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TURNIGY AERODRIVE SK3 - 4240-740KV BRUSHLESS OUTRUNNER MOTOR

Feb 05, 2021

this little baby rips my f22 foamy from flite test with an 8x8 prop. Quiet, smooth running motor on 80 amp esc on a 3s 2200 battery

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Kv Lower than 740

Dec 18, 2020

This motor was recommended to me by Hobby King technical support, as was the propeller for my Kingcraft Pitts Special S2-B. This was the first electric powered ARF I bought, so I depended on HK to recommend the right motor/prop. The motor was not a good match for the prop because the Kv was more like 695 instead of their published 740. Spinning the motor with my drill press at a known RPM and measuring RMS then converting to Peak to Peak revealed this. Also, my all-up weight for the Pitts ended up being 3120 grams. Pretty close to 7 lbs. I've since learned that for an aerobatic airplane, you want roughly a minimum of 100 Watts/lb. I was only measuring 620 - 650 Watts. The best performance was with a 14x7 prop. Even then, I could barely pull through a simple loop. Maybe a larger PropDrive motor would be a better selection. I paid only $38, but not a good value in my opinion. The Pitts Special is not a .46-size aircraft, but rather a .60-size. Choose your motor appropriately.

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good stuff

Oct 08, 2020

quick delivery for good motors