EMAX RS1106-7500KV - Huge Super Power! 2S & 3S Thrust Tests

Available @ EMAX USA & Banggood: goo.gl/hPMVbi
emax-usa.com/em...
Available @Banggood: goo.gl/hPMVbi
www.banggood.c...
Pack of 4: goo.gl/VSnnMi
www.banggood.c...
Thrust table: www.dropbox.co...

[@narnasqueneth]

love these tests, thank you for your work

[@digranni128]

The best tutorial on KZbin! Thanks dude.

[@jos7709]

Very good video! Thankyou ! I want to test it with 1S , if 1s thrust is bigger than 60g , I can use it for upgrading micro planes with coreless motor

[@EngineerX]

I think too heavy and KV too low for 1S replacement for coreless. I think those are very high KV more than 15000

[@narnasqueneth]

well shit I've been running these RS1106 7500kv motors on a 2.5 inch at 4s! wondered why the motors were so damn hot after even a relatively easy flight! Super fun though!

[@EngineerX]

LoL.... must be a fun setup. Specially if it's super ultra light. Well, as long as motors are not on fire and keep going, who cares how hot they run anyway. Great to know you can run them on 2.5" and 4S. I would've never thought it would work for long. Thanks for sharing

[@narnasqueneth]

@@EngineerX yeah its an spc killerwhale frame with a mamba f405mini stack and eachine vtx02 so pretty darn light. I run it on a 800mah 4s and only do a few short bursts up then length of a Football-field sized park amongst some smoother flying between tree branches so I guess that's the time it has to recover from the punishment

[@achmadoskar]

@@narnasqueneth hi, I have same setup and worried cause its just hot. I was thingking of replacing the motor. How did your motor stand up the beating?

[@narnasqueneth]

@@achmadoskar still going strong. These are good motors. Just make sure you've got plenty of cooling if using them on a plane and don't hover in one place too much if using in a quad

[@ruftime]

Great testing and analysis! Thank you!

[@EngineerX]

Thanks for watching!

[@MichaelRogersJesusrules]

good man. love the sound.God bless

[@EngineerX]

Michael Rogers Thank you for watching. And blessings to you as well.

[@imemyself2820]

You just loooove being at the dentist, dont you?!

[@EngineerX]

LoL.... it sure sounds just the same as when dentist is drilling'em cavities ..... cringe!

[@blackmennewstyle]

Damn, this motor is really hungry :O Have a great weekend

[@EngineerX]

LoL.... no worries, small LiPos will put it on a diet, but will have to eat again after 2 minutes, maybe 1:30..... LoL Have a great weekend too!

[@adamk.3946]

For some reason, a lot of your motor tests don't give me a notification :-( thanks for the testing! Pretty beastly motor!

[@EngineerX]

mmmm... even if you click on that bell next to the subscribe button? I got a few more interesting motors to test, SunnySky 1106-6500KV, BH 1402-8000KV (perhaps only 2S voltage), rcINpower 1108-6800KV

[@adamk.3946]

EngineerX yep! The bell has been clicked for a long while, but still for a bunch of your motor tests I get zero notifications. Excited to see those other motors!

[@EngineerX]

That's odd. YTube revamped the way it looks now so maybe they screwed up something.

[@dannyg2845]

Are you gonna test the new rcinpower 1108? Very appealing motor with good efficiency.

[@EngineerX]

Yes I ordered the 1108-6800KV from Banggood, it arrived today. Also rcINpower factory said they would send me a batch of all their new motors yeay!! It'll be a couple of weeks before I can get all data on motor on publish test video, not having enough free hobby time lately.

[@Sugar_K]

Aweome work as always.. have the new props turned up yet?

[@EngineerX]

yeah, got them a couple of days ago. I actually ran these tests about 10 days ago, then got some cold virus .... wifey, daughter and me.... daughter was the worst, almost 10 days of fevers :( Gonna run them on the SunnySky 1106-6500KV and see how they compare to the others. My initial guess is that they won't show "good" numbers on the thrust stand but they shine in actual flight. What I've been noticing is that at this motor scale, the "larger" props overwhelm these tiny motors on the Max thrust runs on static conditions BUT when moving, these aggressive props are able to grab more air and load the motors better than the other "light" props. You can see and hear the DYS 3045x3 on 2S at the top end the motor just starts to heat-saturate and RPMs fall off quickly, but people are running that prop with very good results. Same thing you're experiencing with the 4-blade 3" RacerStars. I'll run them and see what numbers they can put down. Thanks for sending them. I really need to find some spare time to finish my 1106 build and my 1407 5" / 4" build

[@Sugar_K]

dude FPVtv just got the sunny sky motors.. i guess we know exactly where the spintechs are made now.. and what the 8000s are capable of looking at the numbers sunny sky have.. the 6500kvs look like they could be 4s monsters.. one thing I'm noticing about my spintechs is how much motor noise they generate.. its massive and takes a lot of tuning and soft mounting every thing to keep it out of the gyro trace. i have given them a bit of a run on 3s and while they work they need different and more aggressive tuning to 2s so once i have it dialled in the 2s i'll set up another profile for 3. I'm still struggling with batterys for those guys and can destroy a tattu 650 in 2min flat. i'm hoping to get some rline 850 4s batteries next month and mod them to 2s so i can actually run the motors WOT even just a little bit sorry for the shitty video quality ( I'm trying different cameras so find a good one ) but this with 50 degrees of camera and 50-60% throttle kzbin.info/www/bejne/nHTOmZJ7fst_Z9U

[@EngineerX]

I thought those SunnySkys looked familiar! We really need some good small batteries for these micro monsters. Pretty crazy to think these 1106s are killing LiPos LoL. Very fast and responsive setup you got there. Sure doesn't seem like it's on 1106 motors. Flies really well. Could be the super high KV is going to become a limit as far as noise? Or may be need just different BFlight filtering - I'm not good at setting up those darn filters. I just leave them at default.

[@Sugar_K]

my Emax build has noise too on the foxeer at high throttle settings much like the spintech build but not as bad.. i'm going to look at capacitors next and maybe some LC filters as well. i'm also going to try some different soft mounts on the spintechs as I'm not sure the ones that came with the motors are all that good. i use the dynamic filtering and all other filters shut down. the stock pids are ok but the D is too high. i drop the Ds to 22 to start and have found 15-16 is the number needed once you get the quad dialled. lower D to drop the motor temp.. up the P on an axis to stop the prop wash.. increase I to stop any drift on the throttle in a certain direction.. check out stingies tuning method its pretty good

[@kadenmcnamara1450]

How is the heat on 3s with the 2.5in blade? Smoked?

[@frasersteen]

These 1106 motors are starting to out thrust some of the early 1407s now on 3" - 3s and getting close to some of their 4s numbers.

[@EngineerX]

Fraser Steen Exactly what I was thinking when I saw the big numbers.... had to do a double check. Just need some equally powerful LiPos now

[@frasersteen]

The problem is that it's starting to get to the point where the weight is all lipo which brings different problems. I can build a 3" 1106 to

[@EngineerX]

Very true, you get that nasty pendulum effect with a heavy LiPo underneath, not fun to fly. Cool, thanks if you can setup the 1107's I forgot to mention I did order a rcINpower 1108-6800KV from Banggood that should arrive any day now (unless it got caught in the Chinese holidays) so that's going to be interesting on 3" tris. but yeah, we're reaching the limits of matching all components for best performance, so diminishing returns as heavier LiPos are needed to get the most out these motors.

[@therealjonnyd]

Fraser Steen Make a split 4s pack and mount 2s ontop and 2s on bottom lol.

[@EngineerX]

LoL ...it may just work

[@leftyfpv8263]

440grams on 3s , that is insane! Oh man I really wanna see the 4500 on 4s. I see you got the dys 3045 :)

[@EngineerX]

I had to double check.... could not believe this little motor could make all that thrust! yes, I had actually ordered them from ReadyMadeRC a few weeks ago and set them aside but remembered when you messaged me :) - my reply to SugaKane above about the more aggressive 3" props on these micro motors: My initial guess is that they won't show "good" numbers on the thrust stand but they shine in actual flight. What I've been noticing is that at this motor scale, the "larger" props overwhelm these tiny motors on the Max thrust runs on static conditions BUT when moving, these aggressive props are able to grab more air and load the motors better than the other "light" props. You can see and hear the DYS 3045x3 on 2S at the top end the motor just starts to heat-saturate and RPMs fall off quickly, but people are running that prop with very good results. Gotta make some time to run the RCX 1304's next. Also got the BrotherHobby 1402's but very high KVs, 8000 & 9500KV. Also ordered one rcINpower 1108-6800 from BGood and RCinPower may be sending other KV versions soon. Too many motors out too quickly - can't keep up LOL, EMAX 1106-4500KV results coming next... on 4S not as impressive as this one, but still good performance for 3" - maybe will give longer flight times.

[@leftyfpv8263]

EngineerX haha, awesome!! Thanks again for the hard work my friend. So many choices and combos, it's the micro revolution lol!!

[@ABLomas]

24A with some props at peak. Smoke generator, LOL =)

[@EngineerX]

On the thrust stand only. I always make the best effort to explain on the video that the high Amps are very exaggerated and definitely NOT what you'll see in-flight. Static thrust is like that, motors see much higher loads.

[@ABLomas]

I understand ;-) Still, should be ~15A with similar props when flying outdoor at WOT, a bit too much for those motors... ...but 3S + 2" combo looks very promising ;-)

[@ganon420]

Andrius Narbutas You also have to keep in mind that we use small batteries (less then 500mah) for micro quads. Lipos that size will have trouble supplying 60 amps.

[@RockTouching]

With some 1104 7500kv motors my Tattu 450mah already come down warm/hot. I have no doubt these motors would kill them.

[@therealjonnyd]

RockTouching no doubt. My SunnySky 1106s puffed my Tattu 650mah 75c pack today, it's only had like 3 cycles total -- this was the first flight on the big boy motors though. My GNB 450s take it like a champ, but obviously have plenty of sag at this power level.

[@kevinhagan8562]

how many amps are being added because of the motors and props being stationary would you say give or take?

[@EngineerX]

For micro motors I have not done actual flight tests as I have with larger setups, but my best guess is around 25% higher on Max Burst Amps. So if you multiply the Max Amps from the tables by 0.75 you can get an approximate Max Burst Amps in-flight. But gotta keep in mind that's an estimate because there are so many other variables such as overall weight of aircraft, and also a key factor is powersource: battery pack will dictate how many Amps it can deliver to motors.

[@joshuamiddleton5274]

Do you think running the 3020's on a light 2s build would be good?

[@EngineerX]

It should give you good performance, but I think the GF3025 is a much better prop if you're going to be doing any freestyle/acrobatics. The 3020 would be good if you're just cruising around and in that case, maybe the 6000KV motor would be better so you can get slightly longer flights. But if you want the most performance then it would have to be the 7500KV motor.

[@MajorProblemsStudios]

If I run this motor on 4s with a 2" prop will there be fire and flames?

[@EngineerX]

MajorProblemsStudios highly likely..would be my best guess. Even 6500kv would be the highest I'd venture trying 4S.

[@yourfavoriteaudience7460]

Hallo mr enginer, i need your opinion,you think it's better emax 1106 7500kv or sunnysky 1106 6500kv, im looking for longest flight and torque and offcourse the power thanks mr enginer..

[@EngineerX]

Both motors are good, However on some batches there have been reports that the SunnySky motor shaft would get a bit loose and needed to be fixed with glue/green Loctite, so the EMAX might be a better choice, but for longer flight go with 6000~6500KV. The higher 7500KV will discharge battery quicker. Also there are new motor sizes that will probably give you longer flights and also have more torque. 1206/1304/1306 are the new sizes but still need to see how well they perform on 2.5 ~ 3" props

[@yourfavoriteaudience7460]

@@EngineerX thank mr enginer very helpfull,so if im want to longer duration flight time i'll go to 6000/6500 kv right ? So you think the sunny sky are not good enough ?

[@EngineerX]

@@yourfavoriteaudience7460 SSky are good but problem is many people reported the problem with shafts. Maybe SSky already fixed it but you never know what motor you will get. 6000KV on 3S and 3" like GemFan 3025 two-blade propeller is a good setup for good flight times. You have to keep low weight to help times. Here's another way. 7500kv, ultra low weight, large Lipo- look at video description kzbin.info/www/bejne/boSpfIF8orZ_mtU 4500kv 4S kzbin.info/www/bejne/pJeaopWHqtCNj80 kzbin.info/www/bejne/hqC6aItqodmYbsk

[@carboncopters5674]

@@EngineerX 6000 KV motors in 1006 size lack of torque for 3 inch props therefore they got too hot on 3S and waste a lot of energy. Longer flight time will be provided by 4500 KV with 3025 and 2 / 3 S. It is quite easy to make 8-10min flight on them with total 250 g of weight micro including GPS and HD recording camera / additional sensors or 12-14 min with just light FPV camera cutting down to 140-150 g.

[@EngineerX]

@@carboncopters5674 Yes. That's what I've been finding out. 11XX 6000kv and higher match best with smaller 2" and some 2.5" props and lower KV 3800 to 5000 much better for 3". Also the newer sizes of micro motors will match better with 3". EMAX has the new 1306 and there are some 1206's. In the past RCX had the 1304 but not many people knew about it but it was pretty good then. Thanks for your very good and informative comment. I'll try and remember to mention about this in a future video.

[@redazu911]

I've tried using these with so many different props in the air on 650 3s and they are just terrible lol. My blackbox shows my vibrations are almost nonexistent and I've got it tuned nicely, even dropped D all the way down just to rule it out and these motors are reaching 145f just cruising around on 2035 props with it being 70f outside. Not to mention the massive voltage sag they cause and extremely inefficient. I only get like 2.5mins just cruising around. I get nearly 10mins using 6500 1105's cruising around lol.

[@EngineerX]

Interesting info - thanks for sharing!

[@omg133777]

Thanks for the information, i were close to buy them but now i prefer the 1106 6000 kv motors

[@EngineerX]

andi That would be a better choice. Should give you plenty of thrust on 3S.

[@omg133777]

Hey, engineerX thanks for your fast response. Can you give me some options for my 90mm build. I want to build the KL_EX90 on my own, but cant decide which Motors i should take. want to run it on 3s. On the BNF version of this drone used MC1105 7500KV Motors (Props: Gemfan 2035x4) but the maximum thrust of them is pretty low, around 108g on 8V. the link for the motors: www.fpvmodel.com/dragonfly-mc1105-micro-class-racing-motor-7500kv_g1335.html sry for my bad english, not my main language :)

[@EngineerX]

andi So first you determine what limit is for the prop. Looks like 2" is the limit. Then you decide voltage =3S. Then decide what motors and if you want emphasis on power or flight duration. Power =6000kv. Duration=4000kv. Then you select ESCs. 12A for 4000kv. 20A for 6000kv. Then select Lipo. 3S- 400~650mAh for 4000kv and 550~800mAh for 6000kv. You will want to get good quality high C rating Lipos. Same goes for 2.5" or 3" frames

[@Indy64738]

Hi, thanks for your reviews, I'm getting used to choose motors after watching your channel, pretty cool. I've two 11xx quads with3 inch props, Emax 1106 7500kv and DYS 1104 7000kv motors and same issues running 3S. I experience a lot of vibrations that I can ear even at middle throttle and NO issues at all in 2S even at full throttle...? same with 3045, 3035-3 and 2435-4... Can you explain that?

[@EngineerX]

Almost always you will have to adjust PID settings when going to higher voltages. Also, any weakness in a frame can show up when you increase thrust/rpms. So make sure nothing is too loose. Make sure the FC is nicely secured and that the frame is not too flimsy/flexible. In extreme cases you gotta softmount the FC. Also at these very high KV's some people have experienced electrical noise leaking into other electronics, so that's a possibility. I think they've had to use low ESR capacitors to get rid of noise. 200 to 470uF 16V Panasonic FR or FM series are very good for that. So first make sure everything is very well secured.

[@Indy64738]

EngineerX thanks for your answer, I’ll check all that... I’m just surprised, it’s an air vibration that you can actually hear, like when a prop is bent. Except that all my props are new and it’s the same with different props and only in 3S... strange isn’t it?

[@EngineerX]

That is very strange. Sometimes the high rpm may induce some sort of resonance frequency on the frame (especially when there's flex in frame arms) So unless a motor has a bent shaft, and PIDs are not the reason, next thing to check would be the frame. Hopefully you find the issue.

[@Indy64738]

thanks again, and experiencing vibrations when pushing the throttle, what would be the next move more like? Increasing P value? could increasing TPA be helpful? I'm not that good changing PID...

[@EngineerX]

Take off props and connect to Betaflight configurator. Go to motor screen and check each motor to feel any bad vibrations by spinning motor gradually upto around 75% TPA will probably not help, hard to say if you need to increase or decrease P. I would start decreasing but it seems it's either something mechanical (motors could be wobbling or frame is vibrating) or the FC doesn't work well with the setup.

[@MrOrangeman18]

would these be ok for a 3" setup?

[@EngineerX]

Possibly on 2S super ultralight with 3020 props... May still run hot. I'd go for lower KV 4500 to 6000. Most people are now favoring 1206 size motors these days

[@MrOrangeman18]

@@EngineerX yea ive watched a few vids with people comparing but everyone seemed to favour the 1106 over the 12xx, im finding it hard to know what to go for

[@EngineerX]

@@MrOrangeman18 there's also 1304s. I know. Everyone has his preference. It really depends on what you expect. For instance, ultralight setup and 2 to 3min flight ~> then 1106 6000 for 3S and maybe 4S would be ok. Some want more of a cruiser and longer flights, then 1106\1206\1304 4000 to 5000kv would be better. Right, you will find different opinions and they can all work almost the same.

[@MrOrangeman18]

@@EngineerX cheers for your help. i have decided to build these motors arounf the 2" class, with a small2-3s battery. should make for a little ripper,

[@EngineerX]

@@MrOrangeman18 sounds great. Im a bit on the "don't stress motors and batteries" thinking. So yes 2" to 2.5" on 2S/3S will be quite the ripper. These emax seemed to run just a little hot that's why I was reserved about running the 7500kv on 3S and 3". 2S should be fine as I mentioned. The main concern actually would be the batteries. 3" 3S 1106-7500kv would be very punishing on the tiny batts- Just based on what I saw on thrust stand: 23A for 3020x2. That's roughly 14A per motor unloaded (60% lower than static) Let me know how the build turns out. Cheers.

[@brassmonkey0300]

just bought some for a 2 inch build, meh too large for a 2 inch quad, and too small for a 3 inch.

[@Nici619]

Thx bro for the video. I buy the Sunnysky R1106 6500kv motors. Do you think they can handle 4s on 2030 Propellers?

[@EngineerX]

Nici619 I really can't say as I have not ran those yet. I bought one of that exact motor from BGood but haven't had a chance to test it yet. I think if the Amps are about same as the EMAX using the GemFan 2040x3 it should be ok on 4S but you'll need some good ESCs. 20A just to be safe. If motors are coming down barely warm on your setup then maybe 4S will be ok. Check motor temps for sure after a short run. It'll be a week or 2 before I can do the review on the SS1106.

[@Nici619]

EngineerX thx for the quick answer. Which kv-version did you buy?

[@EngineerX]

6500KV

[@therealjonnyd]

Nici619 I'm gonna say no on that. They're not even officially rated for 3s, let alone 4s. They can get quite warm even on 3s. They're monsters, though.

[@bezerkfpv624]

Holy cow 26 amps

[@EngineerX]

Static thrust, air not moving prop can "grab" more air - power supply - single motor - no voltage sag = high thrust high Amps, Dynamic thrust, air moving prop "grabs" less air - LiPo - 4 motors - voltage sag on high throttle = ~ 35% lower Amps and lower thrust.

[@bezerkfpv624]

But still!

[@EngineerX]

I forgot to add... the actual limit are the LiPos. Most small sub 600mAh packs can hardly deliver 45A sustained burst ;) That's why I always keep repeating ...... static thrust exaggerates both thrust & Amps You won't see these high Amps in-flight at all. BUT Still.... these motors will torture most LiPos, on constant full throttle, you'll have to land after 2 minutes. If you go easy on throttle, then not so bad.

[@bezerkfpv624]

Yea I am aware of this but take the racerstar same motor in the 3800kv it never got above 6a with prop 6 on 4s

[@EngineerX]

Half the KV.... more thrust = higher load & Amps, the go hand in hand. Good thing we got lots of choices so you can choose the RacerStar 3800kv on 4S and only have to use a 10A ESC ;)

[@aesthion3917]

Do you think that running the 7500kv variant on tattu 650 mAh 2s with GF3035 is possible? I calculated all my weights and my build comes out at 117g with the battery.

[@EngineerX]

3-blade 3035? it should be possible, but I would for sure check motor temps on first flights after a short run, flying incrementally more aggressive. I have not been actively researching how the 7500KV motor is being used. From my test results it does seem that in the air a 3" prop should do OK once it unloads, Amps will be manageable.

[@aesthion3917]

EngineerX Alright! Thanks for the quick answer. Worse comes to worse I have the new 2540 triblade gemfans as backups or the two blade 3020 gemfans. Ideally id use the 3035s though.

[@aesthion3917]

And on 2S with the same setup that i explained, would you go for 6000kv or 7500kv for these motors?

[@EngineerX]

I think the motor should be able to handle 3035x3 just fine but I always like being cautious on new motor/prop combos when I have not seen anyone confirm they work fine. So always good to check temps after a short lap. You can start with 3025x2 then if motors are not super hot, try the triblades. For 2S, based on KV the 7500 motors would be the better choice for a fast microquad. For a more balanced 3S, seems people are liking the 6000KV but I'm sure for those that like to really push the limits, 3S-7500KV is what they'll be thinking about. I wish I had the time and resources to fly every single motor I test but time doesn't allow it.

[@aesthion3917]

EngineerX Thanks alot for taking the time to answer my question! Really appreciate it. Ill be sure to give you an update when I get my build working. Keep up the great work :)