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.
hi guys, i have a stick 1500 with: - 70 Amp opto Esc with 5Amp external ubec* - HXT 6.9kg / 39.2g / .16sec Twin bearing servo* - FrSky DJT 2.4Ghz Combo Pack for JR w/ Telemetry Module & V8FR-II RX* - Turnigy 9XR Transmitter Mode 2 with Turnigy 9XR Safety Protected 11.1v (3s) 2200mAh 1.5C Transmitter Pack* but i dont have motor, i saw this: -NTM 42-38 750 Kv/ 785W* -NTM 42-48 650 Kv/ 1295W what is the best motor for my plane, propeller and batery pack?? reguards
I ve now home my order of :two props: APC-e 14x7 and APC-e 12x6, Red brick 100A ESC, going to installed on the Skywalker X8 about max 3Kg.
What battery should I put on this above setup? 4S or 5S ? for calm FPV flying ? 80 km/h cruiser
for this motor.
waiting for suggestions....
this motor will pull out 1295watts at max and watt = amp x volt , you will using 5cells = 18.5v so 70amp esc should be enough ?? ( 18.5 x 70 = 1295 ) I got P51B Dallas Darling 1450mm but I have 4S so I will use 80A esc
Just some more info...
Tried 16x8 APC-E propeller with 4S battery.
Received ~70A and ~1050W. The thrust is about 3.8kg. Much better and after 10 sec full throttle in static the motor was not extremely hot. So I believe the maximal 70A current from the specification is correct.
Also I have 16x7 wood propeller VOX - it weighs 30g (APC weighs 56g) so it should be much better.
Conclusion: in case of 4S battery this motor would produce maximal thrust with 16x6..16x8 wood propeller.
Put this into my 1580mm Nemesis and it flat out hauls. On 4 cells with a 12x8 it's very mild at 650 watts. On 5 cells (4000) with 12x10 pulling 1030 watts at 51 amps and getting 5:30 mins. with 50% when I come back in. Going to try 13x8 and 14x8.5 apc-e on the watt meter tomorrow. Running a 60-80 turnigy esc and plan on keeping it under 65 amps.
Motor really wakes up on 5 cells.
Are you sure about the values? calculations does not match your measurements or you are not using APC-E propeller? could be very different for other makes. Please clarify.
I'm waiting weather to be correct here. I installed same motor and plan to use 11x11 APC sport with 5S for speed or 13x6 APC e for acro.
Please post here your experience then *-)
I'm looking to receive more thrust from this motor but I'm still not sure what should I do - should I keep 4S battery and try 15*10 or 16*6 prop or should I put 5S battery?
At the moment I have about 3kg thrust * 57A with 4S and 15*8 prop...
My goal is to receive 3.5-4kg of static thrust if possible...
Look at the graph for 4S. 57A is really high, you should not use more than 50A on a continuous base.This motor seems not to be very efficient. I discovered after I purchase :-(
Also ther is some balance between thrust and speed. More thrust, less speed. You did not decribe your plane. So here are some calculations:
4S max 14x10 APCE 107 km/h 3kg thrust 52A
5S max 13X6.5 APCE 91 km/h 3.6kg thrust 50A
When weather permit I'll do some test with 6S as I suspect this motor to need more voltage, but this will take some time because weather forecast is bad for till end of next week.
have a check and download "www # drivecalc # de" replace signs and spaces:-)
Actually I don't believe those charts. Where did you get info about motor for your calculations? I feel that engine is a bit underpowered...However it is OK at 57A full throttle - it is warm but not hot. I believe it is possible to load it more up to 65A for short time. I would like to receive more thrust for some 3D flights for my 2.6kg Yak.
FYI I've put APC-E 16x8 and measured about 75A with 4S battery. No info about trust because I didn't fly with it..However I believe the motor would work well with 16x6..16x7 prop with 4S battery...
PS. Drivecalc says 50A is a limit...I think the data is wrong there.
This is your motor, burn it as you want :-(
Remember some basic values: 65°*C MAX for magnets, 90°*C max for isolation varnish on wire, tumb power: 2,65W/gr.
Taking this in to account, the specs at HK are as always VERY optimistics.
I've made a few more tests and I've concluded that above the 1050 - watt range (5s) the motor is really not that efficient. Jumping from a 13x8 to a 14x8.5 apc-e produced little thrust/performance improvement, but sure drained my battery quicker and generated a lot more heat. I'd advise you all to keep the power output to about that range. Could you generate 1300? Yes, it is possible but don't expect much run time.
I bought this motor, want to hook her up to my 42" Pitts (balsa and mono covered). I am planning on running her through a 100a ESC with a 10A BEC to a 4S 3300 mah at 30C. I am figuring the Pitts should weigh somewhere in the neighborhood of 7 lbs completed with the battery installed. So if my math is correct, that should be about 185 watts / lb setup. I am thinking about running a 14 x 8.5 APC for thrust on her. Am I getting outside of what this one would be capable of? Still in the construction stage, so any insights are welcome.. Thanks for your thoughts/advice...
Your setup seems a bit low on the motor, your combination will develop only 460W output and 700W from the battery.this is only 100W per pound just good to fly. A 15x8 could be OK as a max on 4S. Also your battery is too small, flight duration will be very short like 4 minutes MAX
you better pass onto 5S and 4000mA and MAX 13x8 APC-E or 14x6. here you are with 800w input
Hope this will help you :-)
Also, your math is not correct: you should use real figure for the calculation (I mean the power used by the motor with the intended propeller, not the max possible power from the motor).
I ve now home my order of :
Red brick ESC
going to installed on the Skywalker X8 about max 3Kg.
What battery should I put on this above setup?
4S or 5S ? for calm FPV flying ? 80 km/h cruiser
Hello Werner Molder
12x6 with 5S is a good choice: roughly 3kg thrust and theoretical 90km/h (practical more likely 75 km/h) and 45A. So it seems you are about the max of the setup and a bit too slow from your request.
to fullfil your request you should use 12x8 (3.5 kg, 50A, real 95km/h)
With the 14x7 you are going too high: 75A same speed, and 4.6kg of thrust.
As such you should go on 4S but then you have not enough speed (around 65km/h real)
The correct one to be safe and within your request is 14X10 with a 4S (85 km/h, 65A, 3.5kg of thrust).
Only missing parameter is the exact type of Red brick you have. Be careful with them, they are cheap but not the best. You need to cool them properly.I have the 200A model and I use it only for 90A. Then it is OK, and still cheaper than a good 90A :-)
Hello my friend ! Chris.
Yeah ...the X8 is not exactly designed for speed, just for cruiser speed and long distances flying...I Think I will install the prop 12x, because is smaller and in the lauching my hand is under (this is from ppl who re telling this in blogs) the risk of harm. I will try to keep the total payload (including FPV Electronics) under the 3 Kg or exactly 3 Kg. You made me Think and concern about the RED BRICK cooling issues...hmmm..Do u Think that even if I dont reach the max load of 100A..this would be heat anyway?.
Are u curious for see the proyect pics ?
Hello Werner Molder the red brick is just cheap. as such all is cheap in this product. design, construction an transistor selection. So all will depends on theair flowing around it. Just make a test: let it run 5 minutes at full speedwhile measuring the temperature of the ESC and motor base. Then decide what to do. enjoy flying
this is because they are using multi wire together and the are turned as a single wire iwth the varnish. I like that as once you bend then with the correct anglethey will not change and touch the motor while flying.
Nice motor. My setup is 4S 3700mah 25C Zippy and 15x8 TGS Sport propeller -> Measured about 57A * full throttle. I'm going to receive more than 3kg of thrust on this setup which would be great for my 2.55kg Yak54 EPO 1.5m...
PS. Prop adaptor sucks - the shaft is not balanced :-(
Heu? moteur pour planeur? Donc motoplaneur.
Avec une 14X6 et batterie 5S tu devraits avoir 3.8kg de traction pour environ 50A. Cela semble largement suffisant pour faire monter un planeur sous 30°*.
Is this motor too big for the 1.6m (2.8kg) beaver here at hobbyking (PRODUCT ID: 341000003)
I wanted a bit more power, just in case I want to fly with floats later on.
I intend to fly with 4S and a 3 bladed prop 12x7 or so.
They suggest the turnigy g46 or the ntm 42-38, both well below 1kW. (By the way is the turnigy g46 much better quality? Why so much more expensive?)
Any thoughts on configuration will be greatly appreciated ($)
Hi! I would save some money and look at NTM 42-38 look at the thrust figures there, plus it uses 4s batteries, save money on batts there also, that plane is a high wing and doesn't need tremendous power. This 42-48 is a nice motor, I have one for my Mustang, it would be just about right on 4s for your plane on 5s you could hot rod a bit. NTM motors are notorious for loose magnets, re glue before using, and the prop adpt is extra, see NTM parts, cost around $2.00 or so..
if you want to fly off water you NEED power..I have an old Goldberg Eagle on floats, this motor and 5s batts. In the dead of summer when the temp gets up there the plane is tough to get off the water. So unless you live at sea level and the temp is always 75F you might want to consider having more power on tap..Power can always be managed with the throtle stick.
Hi,my magnets fell out so I used cyanoacrylate or super glue medium thickness its the only glue tough enough, give it a coat inbetween the magnets let it set then coat it again, the glue will slightly shrink between coats, then you should be good to go, happy flying..Chris
A 3 blade prop pulls normaly 20 to 25% more current than a 2 blade prop. With a 2 blade 13x8 at 5S this motor is pulling 45A, so with a 3 blade it should(!) pull around 56A on 5S. The motor is specified to 70A, so this should be normaly no problem. But there are many other things, at first, as Scott said, there are different type of props, so there can be a differene. At second the NTM Series are famous for getting their magnets loose and at third, it is a chiona product, so I would not run it on the upper part of the specification. But to get assurance you should meassure it with a wattmeter and then you see the real current.
I ran this motor with a 5s Lipo and a 15x7 light wood prop on a 53" sbach, it has about 6 flights with this configuration but the last one, there was coming smoke out of the cowling, Im still not sure if the smoke was from the motor or from the ESC (Turnigy Trust 70 amps) what could went wrong?
Hi, your esc should be ample for this configuration so i would say you have a bad motor. let them know and they will replace it with a new one, You will have to pay postage both for the old one to be sent back and again for the new one to be delivered. good luck Chris
Hello Erwin Z
YES 15x7 is way to high for this motor.A realistic MAX is around 14x6 or 13X7. This is already a very high load for this motor if you are using 5S.At that level the efficiency of the motor is only 72% witch is bad. You should maintain around 11X7 or 12X6 to keep a decent efficiency like 78%. 11x7 APC-E will gives you 2400 g og static thrust and a max speed of around 110km/h
Hey guys I have a Cessna 182 with a 39.7" wingspan,weight:700G(24.7)it has a DST-kv1530 motor with a 3 blade prop(7X6).The battery is a 7.4v 2c 20c 1300mah lipo.What can i do to add more power and speed for vertical and to get away from counterclock 3 blade prop.I have a 11.1v 3c 25c 2200mah battery,a park 450 brushless outrunner motor,890kv made by e-flite,a composite prop 10x6e & a 11x7e composite prop.The ESC is a 20a.Will this do the job?
Hi Tyrone, It all sounds good apart from the esc, if you cant get your hands on a watt meter you should go for a bigger esc, I would go for a 40amp esc i think you might pull 30 amps with your suggested setup so a 40amp should cover it. Hope this helps you....Chris
Hello Black Rose
here are some data. please you should also confirm the values with a wattmeter.
4S 3 blades 11x6 32A thrust 2500g
5s 3 blades 11x6 47A thrust 3800g
4S 3 blades 12x6 41A thrust 3100g
5s 3 blades 12x6 61A thrust 4500g
4S 3 blades 13x6 52A thrust 3600g
5s 3 blades 13x6 74A thrust 5200g
remember that MAX current for the motor is 70A for 10 secconds only!!!
so a current no more than 50A should be considered
Christ, Thank's for the info on the prop, amps & thrust, I needed them badly, you don't always find someone that's willing to take the time to answer someone, Thank's again. I can't afford to buy props that might not work. I will take current reading faithfully, being an electronic engineer for over 35 years have taught me that. it's like tying your shoes, becomes a habit.thanks again- reward granted.
you are lucky! if using full trottle you are above specs and you controller is really over the limit. This setup gives you 107A! and the motro will be above 100°*C after 1 minute!!
The efficiency of the motor is also very bad (less than 65%)
Reduce down to 11X8 for being safer (60A)or change the battery
WOT is rarely used. The Cub lifts off in ease at half throttle. I tried 12/6 triple prop, still had lots of power, likely better efficiency like you said. 12 min flight time on 50006s. The cool motor may be due to the sub zero temps that I fly in of late... nice solid motor.
Hi, I would try a bigger prop 14x8 or 15x8,
my setup is 5s 20c 80esc 14x8,
so you having 4s you might want to try a prop even bigger,
say a 15x8 if you have a watt meter please use it so you dont go over your esc rating. Chris
I tryed running this motor on my rebuilt money shot with a 60amp sc, 4s 6000ma 20c batt, 12x6 apc prop. plane weight is 2.25kg. plane has trouble with power as not much there. Can anybody suggest what how to get more power please.
Hi, I would try a bigger prop 14x8 or 15x8, my setup is 5s 20c 80esc 14x8, so you having 4s you might want to try a prop even bigger, say a 15x8 if you have a watt meter please use it so you dont go over your esc rating. Chris
What is the right timing settings for this motor?
I,m planning to use it in my HK Sbach 342 EPO to replace the stock motor.
I,m using 4S3300mAh, best propp 13x10 or 15x8?
Planning to use Turnigy Trust 70A Sbech
First chart shows performance on 4S. Efficiency (red line) peaks at 75% between 22.5A and 30A, and drops back to 60% at 52.5A. INPUT Power (pink) and current (green) increase linearly with current. Not sure why they plotted current against current - that correlation will always work! If you multiply input power by the efficiency you get the output power (that the prop gets). Rpm shown in blue, declining with increasing load, mimicking the use of a variable pitch prop to load up the motor.
Does enny budy know if this motor is realy 650kv and not 700kv or 600kv ? a 650kv motor is sepose to idel at 4-5s at 667kv - 669kv a 600 will give 615-620 idel . i ask it because the use is not for aradio contole plane but for power tools and i use 4250 motors and meny times i buy motors that are mistakevly the wrong kv. thanks
I bought this motor as a replacement for a 4250 SK 650kv. I am running it in my 63" P-51D with a 13x8 prop 5s 5000mah 30-40C Lipo. I get excellent performance.
Put it on the box and it ran at 1375 watts 77amp draw at full throttle. It seemed fine. It didnt get all that hot and I am comfortable wit these numbers.
However this motor lacks a prop shaft. Lucky for me I have access to a full machine shop (metal lathe and Mill) and I was able to myself a prop shaft from 6061 Aluminum to match the plane. BEAUTIFUL. Couldnt be happier and will certainly buy another soon.
2 comments. Reply..
Motor looks great, but it doesn't come with prop drive or mounting plate and attendant screws. I think you should mention that in the description.
Also the prop drive is 3 screw mounting so the mount will have to be peculiar to this motor. I can't use my other Turnigy prop drives.