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hi to reply to tank1 the second motor has now seized up and that was in flight in the f86 sabre so i would say that rules out the motor over heating ?? as plenty of air travelling over the motor to keep it cool so back to the drawing board sorry but still not happy with this motor but who knows i may have dropped for a faulty batch ???
Just a quick question - did you balance the unit? It is surprising how quickly an unbalanced fant unit can destroy bearings. Even a couple of minutes can do some severe damage - all of course unseen until the bearings die.
hi bought 2 of these motors just before christmas just put one in a eflite f86 using a changesun 10 blade fan ran motor static for couple of mins bearing began to make a horrible sound before motor stopped and bearings locked up very disappointed ( pile of ****) sorry but expect it to last a lot longer than that, dread to think if the plane had been in the air at the time so its a big thumbs down from me
Maybe it was because you were doing a static test for a couple of minutes and there fore the bearings got a little to warm i would of thought,now if you had been flying with this unit in your plane you would of got some cooler air over the whole unit,so in turn it would of helped keep it form getting to warm,i've been using one of these motors in my Vampire coming up to a year now and no problems,also another one but different KV in a F-16 also another good motor,the forums are full of people using these motors with good results,so make up your own minds,just saying. :-)
Humbertomelo thanks
I have purchased 5 of these for 2 airliners (1 motor for a spare) after 2 flights on 1 AC I get a bad bearing, so I replace the motor, then running the new motor up on the ground another bad bearing, I will replace all 5 bearings before I fly again with these motors, I am using the CS 12 blade 70mm edf's
Mike
Hi
I am running a 12 blade C/S for the sound.(Durafly vampire)
my issue is I get to 60% throttle on 4's and it does nothing beyond this.
44amp draw. less then impressive vertical and dies off as if over heating.
what is happen?
If the throttle is 60% then I suspect it cannot make the KV and burns max amp flattening battery fast or has it made max KV already ( i suspect not).
have tested 6's but similar result except you will cook it if used at 45amp within a few minutes.
where should I go from here? I want to keep 4's so get a lower kv(say the 2100kv 900w) or 3000kv dr mad thrust & hope the suggested available watts can do it.
its already at its limit at 44 amp at full 4s battery pack.But did you try to change the timing of your esc it could help and what kind of batery pack you use it with . some esc can lower the power to protect the low C bateries
Hello all. I ask to answer that who has knowledge. The su 35 plane model weight is 2100 grams. impeller of 10 blades. battery of 35 c of 5000 Ach... There is an advantage of the motor or not. Thanks for the help.
difficult to say with only these infos. how many s??and advantage with respect to what?? 2kg will probably fly the model but not as a bullet... by the way depends on how many cells. 3 cell is not enough for sure but 4 most probably will work
So, Lets see if I have this all straight? If you are going to use this motor with the 70mm changesun 10 blade fan: You want to stick with 4s, max of 70c, Medium timing, 60A ESC. You should expect to see somewhere around 950g of thrust? Anyone want to add anything to this?
EZ400, It depends the duct design/size, EDF exit tube design/size, in some jets you get 1200g thrust and in another jets 900g thrust, in the same setup.
Hi mike. It is relative easy to find these bearings, but you must inform the bearing size...(diameter, height and axis) i have one of this motor instaled in my jet and i can't remove right now to check the dimentions. EX: diameter 10mm, height 4mm, axis 4mm
Mike - When a replacement for this motor only cost's $12.55? Why the heck would you want to go through the trouble of changing out the bearings in your old one?
If anyone has the bearing size, I would like to know, because I think the bearings that are supplied with this motor are very poor quality. I want to order replacement bearings before taking my noisy motor out of the mighty Vampire...
Has anyone run this motor with a standard Haoye 6 blade fan as available here ... on 5S ? What amps ? Any thrust figures ? Installed or not - please say which as thrust reeduces by significant amount once in the duct ..
Cheers
Well I just burned this motor today. I used it in the cs 10 blade. it was pulling 1600w on 6s. haha I should have put a wood spacer between the motor and the shroud. The motor was doing fine until it melted the plastic just enough to allow the blades to rub. PUFFF Im goint to try the dr mad thrust now.
Im planning to use this motor with a ZIPPY Compact 3300mAh 4S 35C Lipo Pack and a High-Speed EDF Ducted Fan Unit 3Blade 2.75inch 70mm for an Avro Arrow inspired design i'm building which will weigh around 3 to 4 lbs maximum not including the electrical components and servos. I want my plane to fly with ease and does not even need to do aerobatic maneuvers. Is this a good idea? If not, can you reccommend a good solution? and what ESC should I use?? Sorry, im newbie at all of this hehe
Thank you very much Maxduca63 I am currently trying to choose between the following engines for 70mm EDF: Turnigy L2855-2800 EDF Outrunner (630W) Turnigy L2855-2300 EDF Outrunner (450w) HK2839 EDF Outrunner 2800kv the problem is that I have no idea which one to use. It's my first experience and I have certain parameters. The thing that I realized is that by increasing the number of blades to reduce the number of revolutions of the engine. Then by a 3800kv for 4 blades remains the choice between those listed above. Perhaps one of the first two would be fine but aquestione is 2800 or 2300Kv?
thought about using a 2500kv motor - ESC 60A - drums 4s 5000mAh 40c 70mm edf hope that holds 12 blades. unfortunately I do not know is the first experience of assembling an airplane 737
With a good 3s battery I got 950g thrust pulling 534Watts ( 11.3 volts, 47 amps) using a HK Blue series 70Amp ESC. With a 4s battery I got up to 1350g thrust but pulling nearly 800 Watts - too much.
This was using the intake ring, but not mounted in an aircraft - when you mount it in a plane, the thrust may be reduced significantly.
humbertomelo, I was replying to the particular question that was asked by harstrat - the question was if anyone has used the L2855-2800 motor with a CS 70mm-10 blade fan on 3s and how much thrust is achieved with this combination - My answer was very specific to this question. Of course the EDF I used in my tests was the Changesun 70mm 10 blade.
linus-p, i think that the motor NTM Prop Drive 28-36 3000KV / 755W is better for this edf. i think that on 3s it will have more thrust than the L2855-2800kv becouse it is 200kv above. and also i think that you can use it and on 4s becouse it is only 3000kv and can produse 755W. more than the L2855 (630W). i think that i will buy this motor for this edf but i dont know if it fits. what you think about it?
Today I tested this engine in changesun 70mm 10 blades fun, TURNIGY Plush 60amp Speed Controller,
Plane : Durafly D.H.100 Vampire Mk6 EDF Jet 1100mm = 1100g without landing gears
3S Zippy 30C series 2450 mAh
Amp max : 30A
Watt max : 330W
Trust in vampire : 540g
max speed of Vampire 135 km/h
4S Turnigy nano-tech 3000mAh 25-50C
Amp max : 56A
Watt max: 840W
Trust in Vampire: 970g
Engine HOT
Note: on the engine is a label on which is written the value of 730 watts
Luka, I think you must be getting quite a bit of voltage drop with your 3s battery. A high-spec 3s battery should give around 500W with this setup. The battery you are using is dropping to 10.1 Volts under load. A good 3s battery for this setup should not drop below 11 volts.
linus-p, i think that the motor NTM Prop Drive 28-36 3000KV / 755W is better for this edf. i think that on 3s it will have more thrust than the L2855-2800kv becouse it is 200kv above. and also i think that you can use it and on 4s becouse it is only 3000kv and can produse 755W. more than the L2855 (630W). i think that i will buy this motor for this edf but i dont know if it fits. what you think about it?
You are correct, you may get more thrust with the 28-36. The problem is that this motor is not designed for an EDF, so it may overheat - the cone on the back of the L2855 is designed to suck a lot of air through the motor and keep it cool. Without this cone you will most probably burn the motor quite quickly.
Hola, Mira, es un motor muy potente y su maximo rendimiento es para cuatro celda lipo (unos 14 V), en un caudcopter, deberias poner 3 como minimo, y el peso seria algo importante. Este motor es para un EDF.
Hi all, I just bought this motor and found that you do not get mounting screws with it. Can you please tell me what length and thread size that I need to mount this to the 10 Blade High-Performance 70mm EDF Ducted Fan Unit as recommended by HobbyKing
The screw holes are 3mm, length is for you to decide, it depends on the mount thickness, the windings are 5mm from the mounting face of the motor and for max thread strength you need at least the same as thread diameter, so with all this in mind,nthe amount of thread in the motor should be 3-4mm.
I bought this motor because people had set it fits perfectly into a changesun 70mm. However I'm trying to install the motor into the changesun fan and the wires have no where to go without cutting part of the motor mount of the fan housing. Wondering what everyone else did to install their motors? Also mine had no motor screws? What size screws do I need to attach the motor to the housing?
I use mine for propdrive (CamProp 5,5x5,5 3s 2800 lipo, gives 497 Watt, nice for the Pylon class under 500) so I don't had to tackle your problem. I used some screws from an old PC. M3 and nicely tapped. But make sure that they are not too long and damage the wires inside (otherwise you screw your motor)
I figured out how to get the wires through without cutting. Now I just need some motor screws. Off to the hardware store today although I have a feeling they wont have anything that small. LHS is over an hour away. Pretty ***med this product doesn't come with mounting screws.
I ran this motor with 6s LiPo, 4 blades 70mm changesun EDF, great thrust and hi velocity, Esc, Motor and Batt just warm. My best EDF experience ever!
Cheears
Humberto
2800kv - it is more suited to 5S and I am sure it will run fine at that. Thus more power output than their wishy-washy "likely to be wrong" specs suggest. I would also expect it to run fine on 6S, but that would be stressing it more thus 5S would be best.
Am I missing something the motors are rated at 43 amp? How possible can you run a 6s on a motor rated for 43 amps. This is meant for a replacement of a stock LX or Starmax motor you get in a ARF or RTF. Why risk your beautiful plane. You guys need to pick up a watt meter and see how many amps you pull on 6s even with a 4 blade rotor...
***bleB, if you play by the book, you never get a real EDF jet experience. I fly my mirage with CS 4 blades and 2800kv with 6s lipo, pull 70amps at full throttle. The motor after flying gets warm aprox 60 celsius, after 20 takeoffs and landings i think i have a great setup...
This motor works well with the CS 10 blade fan. It fits well, and really no modifications are required to the housing. The performance is pretty good. Don't expect it to break any land speed records, but it does hold its own. And of course, the sound is fantastic.
In fact it's not. It gets fully into CS housing with a 0.2mm clearance to the walls. I had to remove the sticker and wrap it in paper during installation. When it gets hot or slightly off center there is a burning plastic smell. Also there's almost no cooling airflow - only inside the motor.
hi guys, i am stuck on what motor to put into my 70mm edf f-35....i am concerned because the specs state not to go over 15v, but on a 5cell, would that damage the motor? here is what i am hoping for this motor, 60amp esc, 5cell 2200 35c batt...thoughts?
I have over volted many different brushless motors. It does work for a while, and if you can keep them cool they will last for quite a while. but it does shorten their life. just do not let then over rev and cavitate the prop or turbine fan. Don...
As long as you keep the current down, you should be fine. Motors are damaged by current, not voltage. The problem is Ohm's law: more voltage means more current - all else being equal.
If you can change your fan, e.g. from a 7 blade to a 5 blade, it will reduce the current due to the lower load. I realize that's not always an option. Also, look at the motor kv. If you use a lower kv motor than what you currently have, you'll be able to run higher voltage.
Customer Reviews
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Burdo
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Bought 2 of these to run in my F-4 Phantom. Using them in a HET 6904 EDF, Otter 55amp ESC and Turnigy nanotech 4S1P 2650mah 35-70C lipos.
Ran 3 tests. Here is the data from the Wattmeter:
Test 1
WH 2.8
AP 38.9 (amp draw)
VM 14.81
WP 555.2 (watts)
AH .188
Test 2 (same battery, voltage drop)
WH 2.1
AP 31.6
VM 13.78
WP 454.4
AH .151
Test 3 (new battery)
WH 2.9
AP 37.34
VM 14.91
WP 577.6 - not quite 630W as advertised
AH .180
I'm very happy with the motor. Word of caution, pull it apart and put some oil on the bearings. Got some noise when first fired them up, but have been great since. Great buy for the money, even at test 2 data. Only slightly warm after running it for the 3 tests.
I'll load a video soon to show the last test results....
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jeanc365
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j'ai monté ce moteur sur un SKYFUN avec un controleur turnigy plush de 60 ampères et une hélice 6X4 e sport, le résultat est terrible, plus de 200 km/h ( accus zippy 2200 mah 40c 4s) déja une saison et ce moteur fonctionne toujours impeccablement, super produit
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Brian
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Bought 3 of these motors. All of them work perfectly! Fan matchup is critical to get the best benefit from these motors. Ran them with 4S 2650 with a CS10 fan and got 750g of thrust pulling right at 40A. Same exact setup with a ZD Fly 80MM fan and I got 1.2 kg of thrust with only 42A draw. Both using 60A ESC with medium timing set. ZD fly F86 is a rocket with this setup as it's weight is 850g and the stock 80MM fan is putting out 1.2 kg of thrust!! Highly recommend this setup!!!!!!
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mcgoughman
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Received this motor and could tell right away there was a problem. Spinning it with my fingers there was an obvious interference issue. Took it apart and found both front and rear bearings extremely looses where the OD fits. All the magnets were contacting the stator. Unfortunately I have had this motor in the box for about a month before I had a chance to check it out so it's too late to return.
I purchased the 2100kv type motor and was very pleased with the results. But as a result of pulling so much power I have lost some flight time. I am trying out this version with a little higher kv and lower battery cells to gain some of the flight time back. The price is still right and the product works.
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This motor works well with the CS 10 blade fan. It fits well, and really no modifications are required to the housing. The performance is pretty good. Don't expect it to break any land speed records, but it does hold its own. And of course, the sound is fantastic. 
