I'll cover this quad over 3 blogs. This first part will cover the build walkthrough, the second the software (betaflight/blheli32) setup here and the last part the flight review.
The Hobbymate Comet Kit is a premium 5" quadcopter that is currently available as a kit for $180 but will soon be available as a bind and fly version. Update: it is now available as a pre-build pnp or bnf with xm+ or r-xsr receivers. In the days since the Holybro Kopis 1 was released there have been some excellent ready to fly models (along with some not-so-great models) available including the Emax Hawk 5 (review here) and the HGLRC Batman (build here) which have been standouts because they have been well balanced, well built and good value for money overall. Since this is a kit, this particular blog is to walk you through the build and then software setup including a betaflight 3.5.1 cli diff.
The Hobbymate Comet from HobbyCool.com (or Amazon) is a kit the consists of higher quality parts than even the HGLRC Batman at only a fraction of the cost. Infact when bought on their own the parts come to $257 which is clearly much more than the $180 the kit costs (or even the $200 PNP kit). The Electronics are rated 6s from the factory (unlike the Hawk 5) and come with motors suited for either 4s/5s operation (2500kV) or 6s operation (1800kV). I'm especially excited that this include a genuine airbot ESC and flight controller. More details on the parts below:
Extra parts and recommended for the build
Firstly you will need extra parts for this build. I've used the following with links to Hobbycool as they tend to have the sharpest price:
And tools/sundry items:
On with the build
Captioned images below should walk you through the build process and I've noted anything tricky as I've gone through. Click on images to zoom.
T-mount propellers are those that are based on a 1.5mm diameter centre shaft secured by a 2mm screw either side. They have been the only mounting option for 2-2.5 inch props but are now becoming more popular for 3" due to the weight they save over a 5mm single shaft prop mount. There are only 4 different types of t-mount 3" prop currently available so I've compared them all plus the new HQ 2 blade which is due for imminent release plus a darkhorse prop in a smaller size to make up the numbers. Please note this is a subjective comparison based on my opinion but my help as a startpoint for your decision. This is based on real world feel, light time and bitter experience with motors I've burnt out.
Emax Avan 3 inch tri-blade
This is the first modern design 3 inch prop designed for a t-mount which was released with the 3" Babyhawk R (reviewed here).
HQ 3x3x3 v1s tri-blade
HQ props have the newest 3" t-mount prop design at present. This has been chosen as the stock propeller for the Full Speed Leader 3 (initial review here and flights here)
Gemfan 3035 triblade
This is quite an old prop and can be hard to find but is still suprisingly relevant.
Gemfan 3025 bi-blade
This is the original 3" t-mount prop and so can be found for sale in weird and wonderful places
HQ 3x3x2 v1s bi-blade
Just released at the time of writing: as per the 3x3x3 above but bi-blade rather than triblade. Disclaimer: I have not tested yet and below information based on assumptions from comparing bi-blades and tri-blades in general. Will update once mine arrive and I've tested.
Dark horse to consider...
Gemfan 2540 flash triblade
Yes this is a 2.5" prop but objectively it is so good it is worth considering downsizing. You can find an earlier review I did on these here and a review on the Skystars Bolt X120 which uses these on 4s here
Please note the King Kong 2840 propeller was not included here because I found the Gemfan 2540 superior in every way. Also I have not include the Rotor X 3044 because it is difficult to source where I am based. The feedback that I have had is that it is more aggressive in pitch than any of the above props and probably only suitable for for stator sizes 13xx and up.
I've had the Taranis X-Lite controller for 2 months now and in that time many reviews have been published, each adding to the information available in the public space. I have made sure I've spent a decent amount of time with this controller before writing my review and as a sneak preview I've sold my Taranis QX7s such is my impression of this controller. I've found that the universal comments that resonate with me are:
I am a thumber I don't care if I can or can't pinch
Let's face it, it's no surprise that this controller has taken design cues from console controllers to target those who have grown up with a controller in their hands. Further more it is suitable for any 'thumber' like myself where your hand naturally fall into a comfortable position with all controls and switches in close proximity. I'm all for the omission of a neckstrap because the weight, size and way you hold makes it unecessary in mind. What if you're a pincher? This review probably isn't for you because I can't empathise but there is no common opinion on whether this will suit you or not. For example two reviews I have a tremendous amount of respect for (NJTech and NickBurnsRC) have opposite ideas on suitability for pinchers. Check out their youtube reviews for more. All I can say is that it is excellent and feels natural for someone who has only ever been a thumber.
Open TX is the operating software
The Taranis X-Lite runs open TX which is the most common transmitter software in FPV (The Flysky Nirvana and new Jumper Radios use open TX too). The X-lite runs the latest version 2.2.2 and find navigating easier than on the X9d or QX7 with the new 'nub' control. I won't cover Open TX here but for those familiar with the system there are no surprises here. The latest version of Open TX for the X-Lite can be found here
I now have a better appreciation for the battery size
When the X-lite was first released everyone was upset about it using 18500 batteries instead of the more commonly available 18650. 18500 batteries were not as common but have now popped up in most stores like Gearbest, Banggood, Piroflip etc. Since battery shipping is still dicey I found an option to use "AA" sized 16500 batteries in my X-lite in this blog. I can now appreciate FRSKY's no compromise approach to choosing the 18500 over the 18650 - it is much more compact especially when considering the batteries used in the QX7 and X9D. Below is a picture of how the X-lite would have looked if they'd gone with 18650 batteries - awkward. Here is the link to thingiverse however if you wish to print.
It is so portable!
Unfortunately the thumbing/pinching has dominated discussion on this transmitter (at least in reviews) that many tend to gloss over what I believe is the strongpoint that sets it aside from most controllers out there - it is very small and very portable. My last controller was a Taranis QX7s which is up until recently has been the most popular transmitter, particularly in the cheaper QX7 form. Although it is an excellent controller, it is large in size (especially if you fly mostly micros!) and it is not especially robust, particularly the auxilliary switches. Really it needs to go in a protective case first and then in your backpack where it tends to take up most of the room. In contrast the X-Lite is small and even if you use the protective case it still doesn't take up much room. Furthermore the Aux switches are smaller, stiffer and overall stronger meaning if you can find a way of protecting gimabls and the screen you could chuck this straight in your backpack without any other protection. Gimbal protection is included but these are loose and would easily come off if the controller was placed directly in your bag. I've recently ordered the "Realacc Stick Rocker Protector & Screen Guard For FrSky Taranis X-Lite" from Banggood which is a 3d printed minimalist gimbal - screen - joystick protecter that *should* allow me to place this directly on the bag and leave a helluva lot more room.
It's worth noting the space and portability was a big reason I preferred Aomway Commanders over box goggles (blog here) and saving room with transmitter is similarly important now I know firsthand what a benefit this is to me.
It takes time to adjust but performs really well
It's no lie saying that my flying was significantly worse than usual when I started out with the X-lite because it felt unfamilar. Yes the gimbals are smaller and yes the have shorter throw. What this meant in the first few packs there was a lot of over correction because it makes you feel like you are running higher rates. Don't adjust any settings though because your brain will adjust and correct. Now I genuinely prefer the X-Lite after this adjustment phase becaue I could never reach full deflection comfortably with the QX7s but can with the X-Lite - I get to make use of the entire gimbal. Bottom line - stick with it, it will feel awful at first but you'll soon come right.
And on to the switches - they are bloody brilliant. They have a much more positive 'click' than other taranis radios and much shorter length meaning no accidental switch flicks plus they will be way more robust (I broke several switches on the QX7s). All four are much easier reach from your index fingers. The practical outcome for me is a can disarm just off the ground during landing rather than trying to land, boucing because of airmode and the disarming... a minor quibble no doubt but definitely still an advantage. There are 4 switches in total - top left and right are 3-way and bottom left and right are 2-way. You can swap these out for other variants including momentary switches if you want. Lastly there are 2 slider style potentiometers (pots) for progressive rather than binary control over gimbals, servos and the like. For most FPV quadcopters these will not be used.
It has a proprietary expansion port
Historically most modern radios including the Taranis range (X9D, QX7) have used the JR expansion port for additional functionality. This includes multiprotocol modules such as the MTX9D and IRange-X IRX4 Plus for control over other receivers and the TBS Crossfire module for a long-range 900MHz control link. For reasons that are becoming clearer now this has changed on the X-Lite. The module is smaller in size and profile and is unique to the X-Lite. At this stage only 3 modules fit the X-lite - the Vantax MPM Lite multiprotocol module, the IRange-X IRX4 Lite multiprotocol module and the FRSKY R9M slim long-range 900MHz control link. The TBS crossfire modules do not physically fit BUT since the pin out is the same, some clever cookies have made 3d print designs that allow the crossfire module to connect to the X-Lite ableit a little ungracefully. As a side note I have a $6 multiprotocol module that I will look to adapt to my X-Lite in order to control my NFE silverware bayang protocol micro brushed quads.
It's really easy to recommend this to a thumber
For a long time there was a lot of hype around project dark knight (now FLYSKY Nirvana) which was due to be the spiritual successor to the Turnigy Evolution. However, the Taranis X-Lite has come out of nowhere with a set of features comparable to the best Taranis controllers in a smaller package at an extremely competitive price and so has kind of knocked the stuffing out of the Nirvana launch. It's a simple upgrade for many in the FRSKY ecosystem because we can use the same receivers which on the whole are the smallest, cheapest and best performing - e.g. the XM+ with excellent range at aroung 1g can be had for around $9 at Hobbycool. The controller is so easy to like and obviously a lot of work has been put in by FRSKY to make this an extremely competitive price - it is only $20 more than their entry level QX7 and includes the much more expensive Hall-effect gimbals as standard rather than an upgrade part.
If you are a thumber or are coming from a game controller I would recommend this highly as a first (and last) controller. Likewise I would strongly recommend this as an upgrade from any other controller especially if you are looking for better portability.
Quick note on the FLYSKY Nirvana
This looks like an excellent controller but is $40 to $50 more expensive that the X-Lite. It has support for a standard sized Crossfire module, better grip options for pinchers and a more colourful touch screen display. It is bigger though - closer to the QX7 in size than the X-lite. If these things are important to you, consider the Flysky Nirvana but if they are not (like for me) then go with the X-lite if you are looking for a console controller style of remote. One potential downside of the Nirvana is that is uses flysky receivers by default which have historically been lacking in features (RSSI, Telemetry) and range although this will supposedly be rectified soon. If you have come from FRSKY though it would mean a full set of new receivers rather than just a re-bind.
Please note this Taranis X-Lite was kindly provided by Gearbest.com. If you find this review help you in your decision to purchase, please consider purchasing from them at this link
Accessories currently available for the X-Lite
Note: Any replacement parts can be purchased from HORUSRC.com
The Hobbymate D6 Pro Duo is quite simply this is the most complete charger I've come across. Up until very recently the charger I have been using most is the ISDT D2 smart charger than can charge up to 6s lipos x2 at a time on separate channels. This has been and excellent charger and the allowance for charging 2 batteries at a time (entirely independently) means that I have no used my balance board since I got it. User interface is very simple and it is a joy to use but there is a glaring omission - it only has AC in put meaning although it can be directly powered from a wall plug, it cannot be powered from a DC (battery) source when you are travelling or have no access to AC power. I'm happy to say the the Hobbymate D6 Dup Pro addresses this and allows you to power and charge from a dc source ranging in 6.5v - 30v meaning you can power from a 2s to 6s lipo/li-ion or a car battery for example.
It's fair to say there is more than passing resemblance to the ISDT D2 as you can see in the image above - the interface although different graphically is almost identical on a functional level. Menus are simple and intuitive as is the way you navigate - a click wheel that is mounted horizontally rather than vertically on the ISDT. The menu and options are a little more extensive in this charger as you can see below. The wireless mobile phone charge is a nice touch but for me at least I haven't had a wireless charging-ready mobile for some time. If I did though I often have my phone floating around when I'm charging lipos so probably makes sense.
In use it works as expected. There are 3 simple modes for your battery - charging, discharging and storage. A very wide range of voltages are available for each mode meaning you can charge, discharge or store rechargable batteries with any chemistry (e.g. Lipo, LiFe, NiMH, NiCd, Lead Acid etc.). The charger will automatically balance each cell in any mode up to 6s as you'd expect. It's easy to adjust current to suit your needs up to 15A on each channel meaning you could easily run 2 parallel boards at a time if you wanted. Current adjust is also available after you have started charging.
I've been using the Hobbymate D6 pro duo for about 2-3 months now and it has become my charger of choice to to flexibility. For the most part I no longer bother with the stress of parallel charging and matching voltages with 2 independent charging channels but with 15A available per channel it is easy to do so. You'll find that many reviewers in the community including Joshua Bardwell and Kabab FPV have also reviewed this charger with a similar conclusion - it simply does everything that is asked of it. It has clearly taken inspiration from the ISDT D2 but they have innovated with additional functionality without losing any of the intuitive functions of the ISDT D2 meaning that they look to have improved on an already excellent product. This charger is made by Hobbymate (HobbyCool) and they are starting to get a number of local retailers but I'd recommend buying from the source at HobbyCool.com here: http://hobbycool.com/d6-duo-pro-ac-dc-battery-charger-w-wireless-smartphone-charging/