EMAX BabyHawk R 136mm 3 INCH micro quad review

The Emax BabyHawk R 136mm with all the gear I need to fly FPV

The Emax Baby Hawk R is a micro brushless quadcopter that was launched by Emax in early 2018 as a follow up to the highly successful Emax Babyhawk (not r). It was launched as a 2 inch but 2.5 inch aftermarket arms quickly became available in the aftermarket and hugely improved the power to weight ratio, disc loading and efficiency. Emax themselves have now taken this one step further with the Babyhawk R 136mm (3 inch). Compared to the 2 inch version is has the longer arms with the new Avanflow 3 inch 3-blade propellers and a reduction in motor KV from 6000kv down to 4500kv although motor size is still the same 1106. Weight of the 3 inch is 86g compared to 82g. I will review the Babykawk R 136mm (3 inch) here.

Specs and discussion

• 136mm motor to motors. This is relatively compact for a 3" stretched x frame.
• Emax Magnum F3 Magnum flight controller with MPU6000 gyro. Will run the latest versions of Betaflight (3.3)/Butterflight (3.4) with pretty much all options available up to about 4k/4k gryo pid loops. F4 would have been nice for better future proofing but F3 is fine for now. The flight controller is nicely softmounted on the frame. Not usually necessary for the MPU6000 gyro but a nice option nonetheless.
• Emax Magnum 12A BLHeli_S esc. On paper looks weak but the reality is that EMAX have rated this for 4s on the 1106 motors so it is all that is required. There could be an argument for going with BLHeli_32 but probably falls in the same camp as the F3/F4 discussion.
• Emax RS1106 4500kV motor. Nice torquey kv rating to spin the 3" props. Designed in the good efficiency/power range for 3 or 4s.
• Foxeer Arrow Micro Camera. Solid branded CCD FPV camera
• Emax Magnum 25mW / 200mW VTX. Basic VTX with two most common operating frequencies for a micro. No smart Audio is a minor disappointment but cannel change button is easy to access as display LED.
• Avan 3 inch props. Will comment more on these since the specs alone don't leave us a lot to go with.

On paper none of these components are especially exciting or on the hype-train. A big HOWEVER though - all are very tried and true, solid and well balanced. This means reliability and reduced cost. The each have a job to do and do it without fuss or flair. It's fair to say though that when you bring them together they are greater than the sum of parts.

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Quick rambling thoughts how 3 inch quad weights

I think of 3 inch quads in 2 ways - a shrunk down 5" based on large motors and 4s batteries or an embiggened micro based on 11XX series motors and 3s. This clearly fits in the camp of "embiggened micro" since it is based around 1106 motors however it is farily unique in that the ESC, motors as well tough frame and cowling are well and truly engineered for 4s - best of both worlds as it were. By constrast my lightweight FlexRC komori (build blog is here) can take 4s but the frame would not hold up to carrying the extra weight of a 4s. Conversely something like the Furibee X140 (review blog here) is pretty gutless on a 3s where it can't overcome the 120g+ weight of the quad.

The Flex RC komori is a 72g 3 inch. It is limited to 2 or 4s because of the lightweight frame's ability to take a hit.

The Furibee X140 is a 125g 3 inch and is by no means heavy for a 3 inch. It can run 3 or 4s but really needs 4s IMO

The Babyhawk R weighs 86g and is designed for 3s or 4s

Setting up

I haven't delved into all the betaflight screens this time because for the most part this is down to preference and your gear. What I can say though is that although not installed from the factory, EMAX have provided some VERY good PIDS for both 3s and 4s. Here is the link to their page or for convinience please see below:

3s PIDS. Click to enlarge

4s PIDS. Click to enlarge

Fly the damned thing

At the time of writing I've only run this on 2s and 3s. 2s was using a 46g 950mah turnigy nanotech battery and was very uninspiring but hey, at least it can be done! 3s was much better than I thought it would be. I used the Turnigy Nanotech 3s 460mah battery (about 42g) and got 2.5 - 3 minutes flight depending on how hard i pushed, coming down at about 3.75v per cell at rest.

The first thing I have to say about the flight is that all of these solid if unspectacular components do come together so nicely - they are all well suited which not only make for an enjoyable and reliable fllight experience but means the cost does not blow out. In addition the protection offered by the 3mm carbon-armed and cowled frame means that even after tumbles there is a good chance you can just rearm and get flying again - it is tough! The other benefit of the cowl is that it looks cool, different from the top plate/bottom plate or side cage frames that are out there.

In the air I think the standard emax 3 inch props props are a real star. They have a pitch that starts of very slight at the tip and gets more and more aggressive with larger blade area the closer you get to the motor. It means that even on 3s with a realtively slow spinning 4500kV motor you can get really good performance. Combine this with the excellent PIDs as above and it has honestly been one of my favourite flying experiences, particularly staying tight and low around trees in parks where I do most of my flying. I do find the blades bend relatively easy but do bend back fairly easy as well. I'm pleased that they are a good prop because there is a realy dearth of 3" propellers with a t-style mount. A quick note that the motors come down barely warm.

Here you can see the unique design of the prop the emax officially calls: AVAN MINI 3 INCH PROPELLER 3X2.4X3

Punch out power is ok on 3s but will hold my judgement till I get some 4s packs. understandably the light 3s packs make for great agility which is why I had a lot of fun with proximity around the small trees in the park that I have close to work.

For FPV camera performance is good - as to be expected from the foxeer arrow micro CCD. VTX is clear in the right conditions and is better than most other micros however I do undersand this can be improved significantly with an AXII ufl antenna (or the cheaper UXII). Channel and power level is easy to change via the small button but as suggested above there is no smart audio or tramp protocol to do this over betaflight OSD.

Summary

Obviously I haven't tried on 4s yet (I am just choosing a 500-700mah 4s to order), but based on the performance of 3s I think this quad is a real winner.

Emax have done a fantastic job on not getting carried away on needlessly overspeccing the quad in areas you cannot really taking advantage of. In doing so they have a solid, robust and well priced offering that I can see becoming very popular like the babyhawk before it albeit with less shortcomings. Better still the support that emax appear to be offering beyond regular customer service such as offering tuned PIDs means that community support will mean there are always going to be clever fixes and modifications that will be available, making obsolesence for this model is less likely. Make no mistake obsolesence is a real issue with quads because once the community moves away from a model there is less support in total available.

Although experienced builders and customisers will still likely want to build their own, It is very easy to recommend this as a first 'racing' micro quad becuase of it's inherent features and support. As a micro quad builder myself it's hard for me to say but this is actually more enjoyable to fly than most of my custom builds because it all comes together so nicely. For that reason it is easy to recommend this to the more experienced set that just want to fly and not fiddle with the micro electronics etc - for example if you have come from 5 inch racing or freestyle quads.

The Emax BabyHawk R is currently available from Gearbest with or without receiver. The model without receiver is $166. If I get access to any specials I'll post on my coupons ans discounts page.

Flight videos

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