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 engineer checks and balances each motor before shipping to the HobbyKing.com warehouse.
Comparing the specifications of this motor with the NTM 3648 900KV, it looks they have made a mistake with the specs.
As I can see from the dynno graphs, power is certainly not 640W only, it should be over 1000W.
Also cell count should be 3-4s and not 3-5s.
Hello Moergo, before being rude and blaming me for my ignorance, did you check the graph of the NTM 900KV motor? I suppose no, because there the graph shows 510W Power Output at 50 Ncm torque, but hobbyking claims 815W of power.
And by the way, when I was referring to 1000W I was referring to the Power Input at 60Ncm.
Hobbying made a mistake with specs. they gave out output power for the 900kv, and gave out input power for the 1100 kv.
Thats obvious when comparing the data.
It wasn't my intention to blame you or sth, i'm not a native english speaker
Is it possible to mount the motor on the front side (where the cables are attached to). I would have to shift the shaft so that it comes out of the other end of the motor to install the prop on that side (the turning side) Is that possible ?
Anyone know if this or other motors will work on the Multiplex Acromaster 43" wingspan? The turnigy 35-42d is supposed to work, but reviews not good and backordered. It should be similar to Himax HC3516 1130KV motor.
You should use a watt meter when testing props. Remember that 640W is at 4S. You can not run more than 42 amps. the listing at 70 amps is wrong!
I would try a 12x6 on a 3S (2.42kg thrust)
i would Try an 11x6 on a 4S (2.95kg Thrust)
Good question. I not sure what the answer is not being a motor engineer but I know each magnet has a fixed north and south pole and the coils are energized to produce magnetic poles in the stators in such a way to push (or pull?) the magnets around thus to make the motor run. I suspect more poles make for higher torque and a smoother motor rotation at a given input voltage. Hmmm! I probably just failed this motor engineering test. Any good motor engineering guys out there with better answer to this interesting question.
Well, for me the more I learn about the technology of our great sport the better I like it. For instance the motor efficiency data is also important because it is an indicator of how much input energy results in output power versus heat to the motor. Heat drives some 95 % of all failure mechanisms thus a reduction in motor life expectancy. I suspect the number of poles designed into motor plays a role in these considerations. However, a better engineer than I will have to explain it.
ther is a motor made by aero nuat wich claims it has 90% efficienct rate and i was told beffore its impossable to heat this motor up. it is the same Kv and size as this motor but they spezlized the bearing and played around with the angle the the magnits are placed to acheave the 90% efficency
This motor has 10 poles meaning there are 10 magnetic poles in the airgap which corresponds to the number of magnets since they each have one side (hence north or south pole) facing the airgap.
I am a motor design engineer graduate student.
Yes it will !
I make some measurements with a Rhino 2150 and an APC-E 10x5 - the planes weight was about 1300g (Hurrican with 1.4m) and the motor had no problem to lift it vertical while only consuming 28 Ampere. The voltage drops due to the small battery to 9,6 Volt. So I believe if you use a better or grater battery and a 3 Blade prop there is no problem to get 1750 g thurst (which is your model's weight as far as I know)
there is a system that can be used to rate motors. often though different manufacturers simply ignore it and stick some random power stickers on their motors making a real comparison out if the question. only big brand supply true info on their motors and as for the hobby king, this series of motors has the best rating to actual performance. just read comment from what people actually tested in real world.
If you want to fly with 3s Lipo, it will be ok. But for bigger 3D Planes above 1.2kg you need another Motor.This one would spin to fast. Better a slower motor with a bigger prop for 3D. So tell us, what 3D model you want to fly.
That should work. With a 10x6 to 11x6 prop ist would fly. I think it would fly fast and very powerful. This motor perhaps wouldn't even get warm. These NTM really pack a punch! I ordered one, too. Will be placed in my aircombat thunderbolt.
Maiden flight today! Tons of power on a Ultimate 40 weighing 4.5 pounds using a Super Brain 80amp esc here are my numbers with a 4s Nano-Tech 5000mah 35-70C 11x5.5 APC style prop
Max amps 72.2 Min volts 15.2 (short flight, 4mins.) Max watts 1109 (1.49hp) Max temp 113* F Max rpm 12,808
Now have about 8ea. 5 minute flights on this motor and it is performing very well. TGS 12x6 prop, 3000 3S NanoTech battery about 46 A for over 500W input. Note that the mounting kit and/or prop adaptor is AVAILABLE but not automatically furnished, and NO set screw collar for the 5mm motor shaft is furnished in this kit (reason for 4 star rating). Collar is highly recommended when the NTM 35 Series Accessory Pack is used. If not installed, total thrust will be held ONLY by the small snap ring on the 5mm prop shaft. Considerable damage to motor and plane is likely should said clip fail. Should the 5mm shaft adaptor be used, the collar is not needed.
Well made, looks better than standard turnigy/HXT motors.
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This motor for a 3548, it has a little longer magnets and the and the stator windings go a little deeper also then the other three 3548 motors that I have of different brands. This allows for more wire onto the stator making it more efficient. I would like to see this same motor with a lower 800KV rating. It would make a super efficient motor.
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Prop and performance data
Well I got sick of waiting for HK to do something about Prop test data coming soon!
I have attached two files. One is a summary on 3S and 4S of a a few likely sized props I had lying around. Readings are all taken about 15 sec into the run so give the best case values after the initial short LiPo voltage drop. The 3S is a new Turnigy 3000mAh 25C, 4S is an aging Hyperion 3300 mAh 25C. Actual load is about 15C for these batteries.
The graph is a full run on 4S at full throttle on the 10x5 which is about as much as I would put on this motor. About 42 Amps, 560 Watts and 2Kg (4.5lb) of static thrust at 12000 rpm. Temp gets up to 40C at the end of the run while the cooling blast is still on it. Peaked at 62C when the motor had stopped. The dip in voltage and current in the first 30 sec is the old battery (high IR). As it heats up, it hits its stride.