Eachine Trashcan: Setup and Full Review

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Introduction
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. 

What is included?
For a budget micro quadcopter it comes with a remarkably well thought out and generous set of parts including

• The quad itself (duh)
• 4 x 300mah HV 1 cell batteries (that are used 2 at a time)
• A PH2.0 bridge to allow 1 cell battery operation
• XT30 connector if you wish to convert to true 2s packs
• Basic USB charger 
• A spare set of props
• A nice carry case (The Emax Tinyhawk is the only micro to offer this till now)
• spare screws and screw driver
• A decent, well written colour manual in English

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.

Spec comparison
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:

Component	Mobula 7	Trashcan	Improvement
Frame	Mobula7	Trashcan	Much more bracing, native support for 2s cells. Props sit in ducts correctly unlike Mob7
Motors	0802 16000kV	0803 15000kV	Taller stator suggest more power and lower kV should improve throttle resolution
Flight Controller	F3 with one UART (update: now F4)	F4 with 2 UARTs	F4 will allows higher gyro rates. Extra full UART allows another periperal e.g. crossfire
Camera	AIO unit	Genuine Caddx EOS	Brand name camera with native 16:9 should give better image
VTX	Smart Audio 25mW	Smart Audio 25mW + 200mW	200mW standalone VTX allows better range & penetration
Batteries	1s HV 250mah (update: now 300mah)	1s HV 300mah	Both include four 1 cell batteries for running 2 cells in series at a time. 20% more capacity for the Trashcan

Props sit correctly in frame ducts

Mobula7 props sit slightly proud of the frame

More and more thoughtful frame bracing

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.

 Setup (Betaflight)
So it does look like betaflight has been customised with a factory tune however it does seem to be half 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.

Binding
Like the Mobula7 and Snapper7, the Eachine Trashcan contains a SPI-integrated receiver meaning you can press the bind button after you connext USB or battery power which is great because the button is tiny. The good news is unlike the Mobula 7 you dont need to take the canopy off... see right for bind button location. If binding on FRSKY use D16 mode.

Click to embiggen

Battery options
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: 

GNB Gaoneng 7.6V 300mAh 80C/160C 2S HV 4.35V XT30 Lipo Battery

​Turnigy nano-tech 300mah 2S 45~90C Lipo Pack

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. 

Flight Performance
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.

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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.

Genuine Caddx EOS camera included

FPV Performance
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:

• It does not handle as well in the dark as the AIO Mobula 7 Camera
• The 16:9 view seems to crop the vertical field of view rather than adding horizontaly field of view. This means that there is less visibility up and down compared to the fisheye look of the AIO cameras we are used to on brushless whoops. Took me a pack or 2 to adapt to but felt weird to start.

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Durability (So Far)
Rather than try convince you how great the frame is, I have made a brief crash roll video below to give you an idea of the (not always on-purpose) crashes I have had. Not even the slightest evidence of damage by now. At this point my Mobula 7 would have already had a few E6000 glue repairs! P.S. the frame is great and I will be upgrading my Mobula7 with this rather than the V2 mobula7 frame as soon as it is available.

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.

When I find the Eachine Trashcan on special from time to time I'll always capture on my coupons and discounts page

Update: Check out my complete and final list of upgrades for the Trashcan (and mobula 7) including PIDs, filters, budget upgrades here

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Upgrade parts (New section)
Given the success of the Eachine Trashcan and Mobula7, there have been many new upgrade parts released in addition to the spares further down

Latest Happymodel EX1102 superlight motors

Available in a range of kV variants, these are the best motors for mobula, trashcan builds. Completely plug and play

Happymodel 0803 motors

Improvement over the 0802 motors especially with a bearing present.

Happymodel Crazybee F4 pro V2.0

This has an upgraded BEC, better solder pads that won't lift and is 3s capable

Happymodel 2s 350mah battery

This fits perfectly in the traschan/v3 battery tray

TPU Camera Mount for 19mm Runcam Split 

​Somewhat crude but effective way to add HD recording to your mobule/trashcan

Happymodel 3s 300mah battery

For use with the new F4pro v2 board only!

Gemfan 1635 3 bladed prop

Fastest prop for the trashcan and mobula 7

Gemfan 1636 4 bladed prop

​Not as fast as the 3 blade but better grip. Superior to stock props.

Spare parts
​These can be found below and are interchangeable with other micro brushless quads, particularly the Happymodel Mobula7:

Eachine TRASHCAN 75mm FPV Racing Drone Spare Part Frame Kit 5.7g

Eachine TRASHCAN 75mm FPV Racing Drone Spare Part RC Head Cover Camera Canopy

Eachine TRASHCAN 75mm FPV Racing Drone Spare Part TC0803 15000KV 1-2S Brushless Motor

Trashcan 40mm props

Trashcan FC/ESC  Betaflight F4 Flight Controller OSD Integrated 4 In 1 10A Brushless ESC 1-2S for RC Drone

5.8G 40CH 25mW ~ 200mW Switchable VTX

Eachine 3.8V 300mAh 40C/ 80C Battery

5Pcs 3.8V 300mAh 40/80C 1S HV 4.35V Lipo Battery for Eachine TRASHCAN

Eachine TRASHCAN Damping Ball Screws

Eachine TRASHCAN 75mm FPV Racing Drone Spare Part Taillight LED Strip Light with Cable Wire

Eachine TRASHCAN  Case Bag

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