D4023-850 Out Runner Motor

 Crono1124 120 points

Nadal, according to Ecalc using this motor and a 8X6 prop (on a 3S battery) will only output 100W. I use 12X6 3 bladed propellers on these motors and I have ~350W output at maximum power on a 3S battery. I have used these motors numerous times and by using the below #'s you will closely predict real world performance with Ecalc: 850Kv, No Load 1.8A * 12.45V, .039Ohm Resistance, 22mm case length, and 12 poles. Also of importance is that Ecalc ESTIMATES that your prop will stall at a pitch of 6 degrees. Best of luck and let us know if you have more questions.

 wellmanite 183 points

you should use a 30-40amp ESC

 tony 16 points

what would happen if you used a 18 amp esc will it over heat or just not run at 100%

 Dibrin 17 points

the max burst you can get off the ESC is the max it can send out kind of like a facet. It turns down some of the water(current) so you only get so much flow. What it cant use it burns off in heat so it is good to keep the discharge rate around 20C if you are running an 18amp ESC. Hope this helps.

 RonRC 1991 points

Tony, I ran one with a 30A ESC and no prop and the ESC started to heat up quickly. I put 40A ESCs on it and it all ran cool. Plenty of power, but my flight controller (i86) would not stabilize my big hexcopter.. Ha ha!

 wellmanite 183 points

9x7sf 3-blade, 11x7sf, 12x3.8sf, 12x4.5sf, 12x6sf, 12x8sf, 13x4sf are all good props

 wellmanite 183 points

There is a huge difference. It is a little heavier, but has a lot mor power. You could easily use 12x6 props if you want, but it will easily turn the 11x4.7 with low amps.

 Hiroyuki 1 points

Hi,I use the D4023-850 on a quad.If you want a intense fly like 3D it is not good.if you try to sky shooting then you get good result. this is too heavy but can fly 2 times minute than turnigy 3010c.pelese look Youtube beltheroe.

 mikec@aloha.net 220 points

i don't see spare shafts listed. given the low price, buy a new motor.

 TERRA Operative 94 points

I can't specifically select to post to Turkey, but the listing allows you to select Turkey for a postage quote in the 'change country' drop down list under the 'shipping and payments' tab.

 TERRA Operative 94 points

The item number for my auction is 130884460616.

 Nadal 5 points

Hi Irfan, i am relocating myself to Turkey in few months, and am concerns about shipments arriving to me while in Turkey, could you give me some advise if possible please!

 TERRA Operative 94 points

I'm the one selling them, I'll ship to Turkey. :)

 wellmanite 183 points

It's about time they restock in a couple weeks

 TERRA Operative 94 points

There's some on ebay.

 wellmanite 183 points

You can learn a rough estimate from me: with-in 1 month.

 mark7 173 points

add it to your wish list and wait.

 TERRA Operative 94 points

There's a set of four currently being sold on a well know online auction site.... *)

 NewToHobbyKing 6318 points

Mubark it would be just powerful maybe. But I say No. REC is 2826 Brushless Motor. The motor here is meant for a slow fly prop. It will not suit the Plane. Also it will be very hard to get the ground clearance for a 12" prop.

 mark7 173 points

Yes, the data is correct. If the motor is not to heavy for your plane (107g) it's a good choice.

 Norbert 65 points

You should gently heat the rotor head and the mount, because the little screws are good glued in. Use heat gun, but be careful! It will work, trust me! Best Regards!

 alex 1 points

Thanks mate,, Actually i found that they are stainless grubs screws.. I ended up hitting the mount with grinder to get motor out.. then the amazing removal of iron dust from the magnets.

 psguardian 33 points

Dual pipe clamps. (looks like an 8 with two clamping screws). Find one that fits the bearing shaft & then mount a dowel of the same diameter. The motor will be offset from the dowel, but it will be solid & eliminate that ****y mount & grub screw.

 Crono1124 120 points

Birdie ESC's refresh rate should function fine so long as you are not using a multiwii Quadcopter. Multiwii requires the 490hz signal. KK2 type FC's are able to function with a much lower signal.

 Crono1124 120 points

This motor has 13 Poles. You can tell from the # of "Clicks" as you spin the shaft.

 dabears720 4 points

thanks crono.

 TERRA Operative 94 points

You'll find it has 12 poles, but 13 magnets.

 Crono1124 120 points

You can easily attach a prop to the motor by removing the top nylon lock bolt and screwing the other bolt all the way to the bottom. Place propeller on the motor and then tighten the nylon lock bolt all the way down. Do not overtighten the upper bolt as you may damage the prop hub and induce a midair prop disaster and DO NOT USE LOCTITE. Loctite erodes the plastic props when its chemical reaction begins.

 mark7 173 points

At least you bought something...I'm waiting in line for new stock.

 andrew 10 points

It was a pleasure doing business.

 mark7 173 points

For 3s under 20A with full throttle you can try 10x5 or max prop 11x5,5 apc electric props. The smaller one will give approximately 14-15A and the bigger around 19-20A peak. You will get around 1kg of thrust per motor.

 Crono1124 120 points

Psguardian. I use these motors and with the specifications you have indicated I agree with Mark7. Although remember if you using 20A esc's running right at the limits 19-20A you run the risk of breaking your ESC's.

 psguardian 33 points

Sorry for delay in cred.... I would be running them on Turnigy 30a multistar ESCs, just trying to keep consumption under 20a p/motor for my lipo sake. 3s 2200 40c SAYS it can deliver 88a, but I don't want to prove it lol.

 mark7 173 points

You can get some extra power by upgrading ESC and run a 4s with max 11x6 apc prop.

 Carlosio 1 points

So this motor can work up to 4S batteries, is´*nt it? Does anyone tried it? I would´*nt like to burnt it in a few flights.

 Carlosio 1 points

I reply myself. Today I tried with a 1.8 4s batterie and my Cessna has flown much better. And the motor works perfectly. Thx for the advise Mark7

 mark7 173 points

Glad I could help *)

 dabears720 4 points

I forgot to mention 4s of course.

 Crono1124 120 points

Using my test rig i attached a 13X6.5" Prop pulling 31 amps continuous and peaked at 34A during runup with max throttle on a 3S. Prop was not tested for balance.

 Crono1124 120 points

Under test conditions across 10 motors I have found that the resistance indicated ~.035 - .04 and No load current was 1.8A * 12.45Volts (3S1P). When using E-calc these #'s more closely related to actual motor performance in flight. Hope it helps anybody interested in buying these motors.

 khairuv 196 points

dabears720, please credit crono1124 :) his tests proved the consistency of the data above. Also consistent with ecalc.

 beatnik1967 12 points

These are great motors for FPV. I use them with 1147 props at 3s when I am running light with no FPV gear then 4s same props with heavier FPV on board. I also learned to fly with these motors and wow can they take a beating and keep going.

 Gatux 20 points

Thanks *)

 Crono1124 120 points

Gatux, I'm using these motors on my scratch built quad frames and ecalc is very close to the actual performance that i get from them. At 3.5kg with a 12X4.5 SF prop and a 3S lipo you will be at about 80% throttle. If you use a 4S lipo with an 11X4.7 E prop you will lower your power required to about 62%. If you absolutely must use a 3S battery I would use the 12X4.5 props. Note: A 13X6.5 prop is over the limit of the motor at full power. Hovers at about ~14A per motor but at full power it exceeds the Amp rating by 1.5 amps. Use at your own risk.

 Crono1124 120 points

Once my Power analyzer arrives I'll find a way to post prop test data using a 3S on 8X4.5, 10X4.5, 11X4.7, 12X4.5, and 13X6.5 props. Hopefully some good thrust to Amp data to come soon (I have way too many props laying around...)

 wellmanite 183 points

OopS... see my reply above.

 Gatux 20 points

ok thanks !

 khairuv 196 points

There is no replacement for the mount, I believe. Just buy a new motor and you got yourself a new mount and a spare motor :)

 Crono1124 120 points

Does everybody else use loctite on their set screws to hold the motors in place? All of mine are starting to come loose after two flights causing the wires to spin with the motor and disconnect from the esc's. I already learned better than to use loctite on the prop bolts... that caused nasty prop explosions mid air.

 khairuv 196 points

ALWAYS use loctite for metal to metal connection i.e screws. Even sometimes on locknuts. They already have nylon for "locking" the screws but additional loctite will help. What do you mean by using loctite on prop bolts? Did that make your prop exploded? How?

 khairuv 196 points

The "ALWAYS" above applies only for dynamic connection i.e have some vibration etc. Static connection may not need loctite.

 Crono1124 120 points

The upper and lower bolts on the prop shaft for this motor. I applied loctite to the lower one then placed the prop on then loctite to the upper one to a snug fit. I came back 10 min later one prop had just melted. When I replaced it with a new prop and did the same with loctite. The one plus the new one just up and shattered to pieces once airborne on my quad.

 khairuv 196 points

Loctite doesn't work on plastic. That's all. Use them on METAL screws and bolts only. You can drop some loctite on the screws and leave them to dry. Then you can screw them on they dried up. It will be bit hard to screw but won't damage your plastic i.e props.

 Prop buster 82 points

There is a direct replacement www.link ID: 142000131 The Durafly Monocoupe uses the same motor system and the exact same mount. They are currently out of stock in both Internationals and States warehouse.

 Crono1124 120 points

Prop Buster, Thank you so much for the information about the Durafly motor mounts. They recently came back in stock and the 16 i was able to grab fit my DT850 motors perfectly. Now if only there was an easy way to remove the old stripped m3 grub screws...

 khairuv 196 points

Hi Rag, I tried the ecalc but it shows no overheat even for 12x6 3-blades. The overheat limit is just a bit after the max throttle. The specs also said that 12x6 on 3S draws 27A and gives 1600g of thrust. That matched my calculation above with ecalc.

 dabears720 4 points

Thanks for the input guys. When the motors arrive I'll test it with my wattmeter to see how many amps its drawing. If I am correct, it should not exceed 35 amps?

 Norbert 65 points

Hello Karel! What do you think? Is this motor good as replacement to FW-190 1200mm with longer shaft? Have you tested it? Thanks.

 EricBR 203 points

i belive it will be fine. i use a 12x6 2 blade with 4s and it pulls 36 amps. a 3 blade 9x6.5 prop will be easy!

 raghaven 7 points

12x6 with 4s can push this motor surely more than 36!!! 36 amps or plus surely push this motor beyond its limits and overheat too check ecalc!! i would surely say to go with 10x5 with safe amp rating if u willing to go with 2 blade props!! comparing ur prop size i think its a nogo buddy!! reconsider ur props

 dabears720 4 points

raghaven were you talking to me or Eric? how do you think my 3 blade 9x6.5 setup on 4s will do?

 khairuv 196 points

Hi bears, your setup will be okay. Don't worry :)

 dabears720 4 points

Thanks for the input guys. When the motors arrive I'll test it with my wattmeter to see how many amps its drawing. If I am correct, it should not exceed 35 amps?

 khairuv 196 points

The above prop test said 12x6 with 3S draws 27A. My ecalc said 12x6 3-blade on 3s draws 33A. But the max current this motor can handle is 35A. Better assume that's in burst (about 20 seconds) so the running current should be less than that.

 dabears720 4 points

Good news guys! I tested the motor on both the normal and reverse 9x6.5 3 blade fms propeller for the b-25. It's only pulling a max of 32.6amps, and I haven't even balanced the props yet! So if you have an opinion please comment, as I know there was some skepticism.

 dabears720 4 points

I forgot to add that it's still on 4s.

 khairuv 196 points

good, that's consistent with the prop-test data shown above and my previous calculation with ecalc.