In the world of brushless ducted quadcopters (whoops) I have been lucky enough to review most of the big hype products - Happymodel Snapper7 and upgrades, Happymodel Mobula 7, Full Speed TinyLeader and now the Eachine Trashcan. Clearly it is a silly but memorable name and it will surely be easy to search for online.
It is great to see a case included here and like the mobula7, enough battery power to get flying in earnest. The included XT30 is a small gesture but a nice touch nonetheless.
For this review I will make comparisons to the Happymodel Mobula7 given it is recognised as something of a performance standard and the popularity and obvious similarities. You can find the full review for the Mobula7 here. When the Eachine Trashcan was first announced the Mobula7 could not be found in stock for love or money, and the specs read like an upgrade of every single component of the Mobula7 - see below for my comparison. Other than winning the mine is bigger than yours prize, there were seemingly some key areas that were addressed that were a known point of discussion for the Mobula 7:
So from a specs perspective it looks to be superior to the Mobula7 in every way however it does pay for this somewhat in weight - up from 26g in the Mobula 7 to 34g but still much less than the 45g of the Tinyleader. Note, for the uninitiated these are all 2s ducted micro quadcopters with 40mm propellers.
So it does look like betaflight has been customised with a factory tune however it does seem to behalf baked? See my comments in the Betaflight screenshots below. Interesting to note that mine shipped with Betaflight 4.0 which although well regarded at the time of writing, is still only a nightly build.
The Eachine Trashcan is capable of both 1s and 2s power supply. The stock batteries are 1s but are designed to be used in series. If you are looking at new batteries I'd recommend converting to proper 2s 300-350mah packs and changing the connector to the included XT30. Unlike the Mobula 7 the Eachine trashcan will fit these pack natively. Packs I can confirm that physically fit the stock frame are:
Throttle limit (modified from my Mobula 7 review)
If you are looking at flying indoors I'd recommend against using larger 1s batteries (450-600mah) but instead use a throttle limit in betaflight. The advantages here are lower current draw and less battery sag. Putting the limit in betaflight rather than on your radio gives you better control and allows you to put throttle limits on an auxilliary switch. Full details on how to limit throttle in betaflight 3.4.0 and up here.
Straight off the bat, this quadcopter is very quick. In fact when I first took off on my initial flight and blipped the throttle to overcome the ground effect, I catapulted straight into the overhead louvres! The power is apparent in actual flight too particularly in the low to mid range where the power feels difficult to manage at times (for me anyway). I found I could manage better when limiting throttle to 80% as above through betaflight throttle scaling. All this thrust means that big power loops and pulling out of large dives very late is even more impressive than the mobula7 and is significantly better than the TinyLeader on 2s. The speed is such that it is hard to believe this is actually a ducted whoop when flying on the goggles - it looks very alien seeing this quad fly line of sight because it is speed and the tiny size.
In terms of handling I feel it is a little more awkward than the mobula 7. I am not convinced this is because of the extra weight alone - I think the more supports on the frame may have altered the aerodynamics. It is not bad by any stretch, just takes a little getting used to unlike the Mobula 7 (or emax tinyhawk) which feel a little more natural. I have not yet tuned to any real degree but this may well help. While still on handling I do get more yaw twitches than the Mobula7 (but not as many as TinyLeader) particularly on split-s and hairpin manouvres rather than pulling out of dives. Since these moves are typically asssociated with propwash it may be that I just need to add additional d-term on roll and pitch axes.
Efficiency - power consumption
The Eachine trashcan comes with 300mah batteries run in series for 2s and outdoors this will get you 2.5 - 3.5 minutes flight depending on how hard you fly and what voltage you come down at. This is the same sort of flight time on the Mobula7 which achieves it with 250mah batteries and smaller 0802 motors. I noticed early on that I was not using the top 20-30% of throttle because although the current draw increases, the thrust does not increase to the same degree. This tells me that on this setup the motor becomes inefficient in this range - specifically that the kV is a little too hight for 2s alone. My guess is this choice was a compromise to still allow reasonable 1s flight. My recommendation for this is to scale maximum throttle to 70 or 80% on 2s which should offer better efficiency, better throttle resolution and longer flight for very little practical loss in trust.
Although I personally do not need it, it is nice to have 200mW available close to hand via betaflight OSD switching. It will give you greater confidence at range for video signal which is an important consideration given the speed at which this tiny quadcopter can cover ground. Its worth nothing that the ability to go to 200mW puts this ahead of all other brushless whoops other than betaFPV 65x and 75x (which have questionable VTXs) and the Fullspeed TinyLeader which goes up to a staggering 600mW.
In terms of camera, the Caddx EOS delivers a superior picture in daylight compared to the AIO cameras of all other brushless whoops exept the Tinyleader which uses a full size micro camera. This was clearly a conscious choice as it contributes somewhat to the weight increase over the Mobula7. That said there are 2 things I do not like about this camera:
Conclusions and summary
The Eachine Trashcan is a 2s brushless micro ducted whoop-style quadcopter avaialble exclusively from Bangood. It builds upon the huglely successful Happymodel Mobula7 and it improves it in practically every aspect from a specs standpoint, most importantly for me from a frame strength perspective which I felt was the only real let down of the Mobula7 in my review. In flight it is a powerhouse but suffers a little from awkward flight characterstics which I suspect can be remedied with tuning. I believe this will be a very popular model and so PID tunes from users with know how will become more readily available.
If you are looking for a 2s brushless whoop and do not need HD recording (like the TinyLeader HD) the trashcan is probably the one to get - if you can get it. It is available exlusively through Banggood and at time of writing it is in pre-order status.
Update: I have just added a new article - how to improve the beeper using software only (for beginners)
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These can be found below and are interchangeable with other micro brushless quads, particularly the Happymodel Mobula7:
I will add more parts as they become available here but in the meantime check out all of the parts available on my Mobula 7 review