NTM Prop Drive motors are rock-solid performance outrunners with tight windings, quality bearings, correctly rated magnets, balanced stator and flux rings, tool-steel shafts plus they are QC checked at 14 points, from material processing all the way through to final dyno test.
Because we design and build these motors completely in-house (from 3D/2D drawing to materials sourcing, machining, balancing, final assembly and dyno) we can completely control production and ensure product consistency from design right through to shipping the product to you. The removal of middle-men has meant we can drive better value to the market and retail these motors at factory(our) prices! All performance figures are real and tested on our own motor dynos.
Our QC engineers check and balance each motor before shipping to the HobbyKing.com warehouse.
I used this motor in my d-y-n-a-m SU-26 plane when the original motor died, it worked perfectly. This motor is a little larger diameter, but gobs more power. I also used the same 4S 2200mah battery, and a 13x8 Master Airscrew 3 bladed prop. The motor was pulling about 45 amps and 600 watts. The original X mount even worked for this motor, I just had to put the screws for mounting the x mount to the plane in the mount before attaching the mount to the motor. an excellent d-y-n-a-m replacement and more power! This would probably work for other d-y-n-a-m planes as well.
i just made a octocopter with those motors, the motors are running fine with 4 x 4s 45-90c LIPO's and RED brick 70A ESC's .. the bad part is i didn;t configured ok the FC... here's the awfull video of the crash https://www.youtube.com/watch?v=PDgn9AIuk1c
Engine has lots of power, however, after a few minutes a lot of vibration, after disassembly shows the fit of the front bearing on the shaft too broad.
The only thing you can do is to eliminate through doing. Loctite on the shaft clearance
Remains a source of concern, pity that this defect occurs* This engine is not recommended.
Very impressed with this motor. Very well made and no slop or bearing noise to speak of. I've installed it into a CMP cessna 182 weight approx. 2.7kg. Running on 4S2P 2650mah 20C Flightmax, Otter 55A ESC using a 3 blade 12x8 APC prop (no thrust measures as yet but I would guess approx. 2.5kg of pull). The following is a reading using fully charged packs for about 30secs. I will update the review after my first flight.
Great motor at a great price. You must buy the accessory pack as I tried fitting another prop adapter to it but they are completely different to the SK series motors.
Awesome quality for the Price...Used it on my .40 class Piper Cub (Balsa) lots of power stays cool!
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Im using this motor with a HobbyKing 60A ESC, and a 12x6 2 bladed prop with power coming from Turnigy 20c 3300 lipo. I have it mounted on a Hangar 9 Cessna 40 and although it does fly, it certanly struggles to get off the ground and is not very fast in the air. After 7 minutes of flying time the battery is very warm.
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I am very satisfied with this motor. I have installed it in a scratch built,68" span Ryan Navion. The motor is spinning a 13x8" prop on 4 cells. Plenty of power. I am using a 60 amp esc. This is a great value from Hobbyking. Motor runs very smoothly and is quiet. I plan to buy another. Quality is outstanding.
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Yes, not so bad! The quality is really good, no any magnet was loose.
Weight of motor is 205g with the accessories.