I'd love to put 4" props on this motor, but unfortunately, I don't know of any with the T-style screw mount. Perhaps there's some carbon fiber props that could work, but If you know of any, let me know and I'll give it a try!

I've been reading about how 14xx (1402 and 1404) have better torque to spool up the props even quicker supposedly, but the thrust is considerably less then the 500gr@3S thrust of these 1108 motors on GF 3025 = 369gr @4S on DYS BE1404 (which weighs a gram more), 229gr @4S on RotorX RX1404 3600KV (+0.5 grams lighter), and 296gr @3S on BH 1402 8100KV (1.1gr lighter). All motor weights are with full wire length. I think I'm going to give the Brother Hobby 1402 a try on 3S just to be able to compare.

This size build on 3S makes a perfect flyer for local parks. It's about the biggest / fastest I'd possibly want for my neighborhood park.

I've heard the superman motors are really good too. They are 1404 3850kv and can go up to 5s on certain props. It came darn close to 500grams on 4-5s depending on the prop. Over 400grams for suure, and with very impressive flight times. I believe it weighs 8.5g, about he same as the 1108.

I think I'm going to try out RotorX RX1404B 6500kv now - it puts out 420grams of thrust on 3S w/ 3025 props and weighs less then the 1108s. By the way, GF3025 props are my favorite 3" props due to their durability and weight. As most of my batteries are 3S 450-800mAh, I need a high KV. I've found when you start going to 4S and 5S w/ 400-650mAh batteries, the internal resistance is higher then larger packs 800mAh+, so the weight gain is noticable. I've broke 4 of my 5 quads now - it's rebuild time (currently waiting for Armattan to ship some frames), but I've been enjoying 3" LOS flying lately (since it's all I've got left).

i'll definately have to check that motor out. Sounds very promising. I picked up most of the 3 inch t style props but havent been able to try them out sadly. I'm in the same boat as you, I'm still waiting on frames from armattan productions. it seems to be taking longer than normal. I ordered it in the 17th and it hasnt even been machined yet. I'm getting too anxious to try out these builds lol. I want to build my brothers one too, but these machining times are killing me lol.

These motors are not light on batteries. My longest flight of 5 minutes was cruising on a 2S 850. I'm typically getting about 3 minutes on a tight course w/ a 3S 550 GNB (ie. not at full throttle for long). I get 4 minutes with a 3S 800 Turnigy graphene which is 30 grams heavier. I imagine a 30 gram heavier quad would significantly lower flight time - that's the reason I went light on this build. A side benefit is that this build has been quite durable so far.

One big note: these times are using gemfan 3025 bi-blade props (which produce ~500gr of thrust). I've got some 3035 tri-blades that I'll put on and report back, but the thrust test from EngineerX shows they are near identical for thrust and amps. A DYS 3045x3 prop was also tested and had far higher amp draw but lower thrust.

What flight times are you getting? What props? AUW? How hot are your motors?

Heyyyyy flight times are about 2-2.5mins, props are hulkie 2540 97 grams without battery, im currently using 650 tattu 3s. Motors come down screaming hot, i cant even full throttle without it KILLING the battery.

I'd try cutting down the P and D terms to lower your motor temps. I'm running about half of the stock Betaflight PID rates for my 3025 bi-blades for a tune that worked for me. Your 2.5 minutes isn't that far off since when the motors are hot, the efficiency goes down. I'd suspect it's specifically the D term that's causing your hot motors. Let me know if tuning it helps.

I'm not so familiar with tuning....is there any specfifc guide or video you suggest to help out?

This is the technique I use:

There are other techniques as well - if you have blackbox data on your flight controller and use plasma tree software:

One thing you could do before investing much time, is just lower the D values by a third and see if it's better. You might have to halve the D term (which allows you to turn on a dime at the expense of heat) to see a notable difference. Also try 2S and see if all the issues go away (that would point to PIDs). If motors are still hot, you really need to focus on softmounts for each motor and the flight controller. Stock PIDs worked great for me on 2S but it seriously shuddered on 3S. I reduced all stock PID rates by half and it flies great now...

Good luck - tuning is a continuing learning process for me.

Funny thing is I just ordered that same frame designer's Quattuor 4" 4mm baseplate for a build with rcINpower 1506 motors.  I'll use the same pod setup as this build. That tribus 117mm frame looks sweet! I wish I would have seen it before I got the minimalist 128 frame as I could have saved 4 grams. But, with that said, I like the camera view above the props and this 128 frame hasn't broke despite numerous hard crashes - and it's a bit larger between props which cuts down on prop wash.  I'd be really curious to see some DVR of the tribus 117 flying.  I just posted some DVR of this build in flight (nothing fancy). I think 1108 is the sweet spot for light 3".  When you go to heavier motors, bigger props take better advantage of them. But if you are going with larger motors on 3", that tribus 117mm frame with the carbon grain cut properly would for sure be superior, although you might want to step up to 3mm.  Be sure to post your build on the tribus - I'm super curious!

Thats crazy man! i just built the quattuor! but I used the 3mm version. Ill post pictures soon. I'm using all titanium screws too, not a single aluminum or steel screw on the whole quad. I'm running cobra motors 1407 4100kv with 4045x2 props. they put out 900+ grams each on 4s. My auw with lipo is 207 for 700mah 4s and 242 for 1050mah 4s. Without lipo its 129/130grams. I highly reccomend cobra motors! they are super smooth and dont get hot even on 4s with 4 inch props. ill  have to look up the specs on the 1506 that you mentioned. Rcinpower always seems to make powerful stuff, even if they do tend to be power hungry lol. I'll get working on the tribus build here soon too. I have to replace a fried fc on my quattuor first :/.

That's an awesome weight! I asked the Quattuor designer and he suggested 4mm for my 17.6gr motors. Wow - 1407 @ 4100KV - I'd expect that to be for 3S.  If you check out my other build, I'm running 3400 KV 1506 which produces 900 grams of thrust on HQ 4x4.3x3 with better grip than a bi-blade. I can also run 5" bi-blades (but tri seems too heavy). I've found rcINpower is an even better value for what you get then RCX = similar quality but lighter and more powerful (at least for the 1108 & 1506).  But, price aside, Cobra is among the best.  I look forward to seeing your builds!

Yeah youd think 4100kv would be too much on 4s, but they dont even get hot. if you look up the motors they mention something about a new, self cooling design. I was skeptical at first, but it definately does work! The reason I went with these motors was partially because they run cool, but also because I wanted the increased rpms. I think RPM's are just as important as total thrust, especially if you can keep it light enough. My motors dont have as much torque as yours, but they do spin a little faster which im hoping will translate to a little higher top speed. On the downside, I dont have the option to run triblades, but I dont really mind. I've always liked dualblades for some reason. Oh and btw! inov8tive designs has cobra 1407 motors on sale. Its a USA based shop. I got my motors for cheaper than banggood with 2 day shipping! They were only about $13 usd each! I cant wait to see your quattuor build. I'm amazed that more people havent tried his frame. I used to have a superlight 4r by catalyst machineworks and the Quattuor is soooooo much better its not even funny. It's also about 20 grams lighter and stiffer. You are goin to love it!

Wow - I never imagined Cobra motors could be that inexpensive! Checking them out though, it looks like they weigh 17gr w/ 3" leads & prop nut – lighter then my rcINpower 1506 @ 18.2gr w/ 5” wire & prop nut but heavier then my RCX h1407 @ 15gr w/ 6” wire & prop nut. Did you have to splice on some wire for the Cobra's to use it w/ a 4-in-1 ESC (that'd be a bummer)? I'm actually pursuing 4" builds on multiple fronts. Not including camera mount/plate, my current posted 1506 build Schnapp Dragon V2 w/ 5” arms has a carbon weight of 35.9 grams (4” arms only save 2 grams total), the Quattuor V2 4mm @ 25.5gr, and lastly a under 20 gram Adam Wilkinson 4” 4mm arms (16gr total) w/ Lemon Tree Quad Lite 1mm plates (~3gr total). I can attest to the durability of the Adam Wilkinson 5” arms w/ the RCX h1407 motors on a 250gr AUW w/ Runcam V1 Split build on gf 5035 bi-blades (I'll post it once I get it updated w/ the new plates). I have broke two arms but they were serious crashes – I imagine the 4” arms will be even more durable w/ less length. The arms are so thin I have ZERO prop wash – equivalent to flying a vertical carbon frame I imagine. I haven't braved putting 1506 motors on the tiny arms as +3.5gr would break the arms even easier. I wish the arms had motor protection, though I haven't killed an h1407 yet. I was thinking about a Rotorgeeks 1407 with equal weight to the h1407, but w/ a third higher thrust but don't know about their durability. Stay tuned for some exciting sub 250gram builds!

True, they weigh slightly more, but im using "deez nuts" prop nuts, I save about half a gram per motor with these, plus the motor has a little less weight to spin! so extra gains there. as for soldering them to a 4 in 1 esc I has zero issues and used the full wire thickness. i even have 12 gauge wire and xt60 on this quad although i might switch to xt30 to save even more weight. btw, you should add me on facebook and we can share builds. look  for Alex Crowder. My  picture is of my Nile monitor. Its a 6ft lizard in a cowboy hat. You literally cant miss it lol. send me a request and ill send you some pics of my setups.

Ps: wherever you filmed that video is gorgeous! looks like a really fun flier! also I posted my 4 inch setup finally heres the link. https://rotorbuilds.com/build/12841
I'm going to start on my 3 inch setup soon too! all the parts are ordered. I'm going to try the rotorx 3044tx 3 blade props with these motors. ive got 3035x3 and 3025x2 also just to test everything out.