If you race “tiny whoops”, the Mobula6 is probably on your radar. It’s among the recent additions to a growing number of brushless 65mm craft with 31mm props, going up against BetaFPV’s Meteor65 and NewBeeDrone’s own brushless offering. The Mobula6 is offered with an “all-round” 19000Kv motor option, and in an insane 25,000Kv “Race” version.

When Banggood offered to let us take a look, we of course opted for the 25,000Kv beast.

Features, Specs, and What’s Included

HappyModel Mobula6 with spare parts and included accessories

Mobula6 with spare parts and included accessories

  • CRAZYBEE F4 Lite Flight Controller 28.5 × 28.5mm (Inductrix size)
  • Onboard 5A/6A Blheli_S ESC
  • Onboard 40Ch 25mW VTx with SmartAudio
  • Onboard SPI receiver—FrSky or FlySky
  • Voltage sensor, Current sensor, OSD
  • 1S battery input
  • 0802 burshless motor with 1mm prop shaft, either 19,000Kv or 25,000Kv
  • Gemfan 1219 3-Blade Propeller (31mm)
  • Runcam Nano 3 camera, 800TVL

In the box you’ll get the quad, a battery charger, a prop tool, 4× 300mAh 1S batteries, a small bag of screws, a screwdriver, and a spare set of props. You also get a printed instruction sheet.

Your options for a receiver are either FrSky or FlySky—there are no options for Spektrum or to bring your own receiver. We’re looking at the FrSky version. The FrSky will run in either D8 or D16 mode (original ACCST 1.0 only—you can’t control this quad with the upgraded ACCST 2.0).

Parts

Frame

The HappyModel Mobula6 underside, alongside the Beta65 Pro underside.

The HappyModel Mobula6 frame looks almost completely identical to the one from 2018’s Beta65 Pro.

The Mobula6 frame appears to be a direct copy of a BetaFPV design. There’s no innovation here on Mobula’s part, but the design has certainly proven strong and reliable over the past year of flying the 65 Pro on which it’s based. The canopy mounts directly to the flight controller as is common with micro quads. Since the camera board is a little larger than others, the canopy is taller than we’re used to seeing and takes on a ball-like profile. It offers freely-adjustable camera angle mounting.

Electronics

The flight controller is pretty standard from a performance perspective; an F4 processor is expected now as are BLHeli_S ESCs and the Betaflight OSD. The VTx is integrated on the main board; this helps save weight and reduce the number of fragile connectors. If there’s any innovation here, it’s the onboard current sensor. This provides a mAh readout on the OSD during flight and helps the pilot to understand battery consumption.

Flight Components

The 25,000Kv “Race” version is powerful. Flight times are short, as expected, at about 2:30. Compared with BetaFPV’s Meteor65, the Mobula6 has a higher Kv rating and retains the less-efficient PH2 connector, so I expected it to burn through its battery in record time. Instead it offers a flight time that’s at least 25% longer than BetaFPV’s brushless rival. The reason for this is that it definitely has less power than the Meteor. The Mobula’s punch doesn’t really compare. Since it’s tough to even use all of the available power in indoor flight, this might not be a strike against it.

Video

The Mobula6 comes with a Runcam Nano 3 800TVL CMOS camera. Usually I’m a fan of Runcam products, but this camera didn’t overly impress me. The picture is strongly sharpened, which appears to be compensating for poor spatial resolution. Almost every dark object in view appears to have a white halo. The camera’s white balance doesn’t ever seem to settle so the picture takes on various color casts as you fly around. It’s certainly flyable under many different lighting conditions, but that’s about all I can say for it. It’s a functional camera, but it’s not pretty.

The video transmitter (VTx) on the Mobula6 board doesn’t seem up to spec. It’s limited to 25mW output power—likely because higher power would cause heat problems on the AIO FC+ESC board it’s integrated into. There are no physical buttons so VTx control is strictly limited to SmartAudio—typically adjusted via the onboard OSD. Actual performance was really weak. The image was easily interrupted by 5G WiFi, showing the telltale vertical static bars as soon as it flew a few feet away. Flying in the same room on a high frequency (above WiFi range) was perfectly usable, but even just putting a wall between the VTx and receiver was enough to throw snow and make it difficult to see. A high-sensitivity receiver like the RapidFIRE and a patch antenna are needed to keep a good signal if you dare to put two walls between them. Other reviewers don’t seem to notice, so it’s likely that we got an under-performing unit.

HappyModel Mobula6 canopy detail

The fully-adjustable camera angle gives a wide angle range.

Setting Up

Binding is a little harder than normal for a micro quad. Since there’s so much stuff on the board, the bind button has been reduced to an even smaller button than usual. The easiest way to bind is to connect the quad to Betaflight and use the CLI. Once the CLI panel is open, use the “bind_rx” command to put the quad into bind mode. Turn on your radio’s bind mode as well and the two should connect up. At least it doesn’t require holding the button while connecting power, which would have been a nightmare.

After binding, it’s a straightforward Betaflight setup. A beginner won’t need to change much beyond a trip to the modes panel to make sure the stick positions all make sense. Advanced users have the full control that they are used to.

Flight

HappyModel Mobula6 underside view of 25,000Kv motor

Powering the Mobula6 race version are 0802 motors rated at 25,000Kv. They seem less powerful than BetaFPV’s 22,500Kv motors, but they do run more efficiently.

The Mobula6 is an enjoyable quad to fly. It’s reasonably smooth, and very fast. There’s a notable uptick in power and handling over any brushed whoop I’ve ever flown. I did find the yaw a bit slow to respond, but this is a tuning issue and a matter of preference. An abundance of power makes throttle resolution harder to manage than a traditional brushed micro whoop and pulls the pilot into flying faster. This can be great if you want to push the edge, but it’s easier to overshoot your limit—and crash harder. The Mobula6 feels like it has a harder time recovering from crashes than other micros, but I suspect that has more to do with a faster average speed in flight.

By adjusting the camera angle downward, the quad can be made to fly a little more like other whoops. Many pilots will prefer this since the 65mm size is great for smaller indoor spaces, but a high camera angle makes them difficult to navigate. I also enjoy the Mobula6 better in smaller spaces with a throttle limit of about 80 to 90%. Putting a throttle limit in place improves control at the cost of top-end speed. This quad has so much top-end speed that it’s rarely used in small spaces. Since this micro can cover ground quickly and operate on a larger scale just fine, all that power can be used outdoors instead! However, this will depend largely on where you live. The quad is so light that it offers no resistance to wind at all. Light winds make the flight experience jerky and unpalatable; moderate winds throw you off-course and might be difficult to recover from.

Build Quality

Happymodel Mobula6 camera connector and bind button

The bind button (right, above motor connector) is smaller than normal and the camera connector (top center of board) squashes wires up against the frame.

For the most part, the Mobula6 seems well-designed. There’s nothing super innovative, but it’s following a lot of tried-and-true decisions from predecessor designs. I do worry about the camera cable which is bent around the edge of the FC board. A similar connection eventually spelled the demise of my AcroBee V2‘s camera connector as pressure on top of the connector broke the wires there. The Mobula’s connector is more protected, but certainly not immune to damage.

Another issue was one of the canopy screws. These screws are very small and one of them wouldn’t bite the frame. A loose connection here introduced a lot of vibration into the video during flight, which is very distracting. I replaced the screw with one of the included spares and it held much better. At first I doubted the need for spare screws, but replacing this one made a big difference in how much I enjoyed the flights.

Finally, we can’t let this section close without mentioning the very poorly performing VTx again. Low power outputs makes it difficult to fly in other rooms, over longer distances, or with other pilots.

Modifications, Repairs and Upgrades

If you need some replacements, Banggood has a fair number of options:

If you want to replace the frame, Banggood doesn’t sell that seprarately. However, BetaFPV has theirs available:

HappyModel Mobula6

Conclusion

I enjoyed flying the Mobula6 once I got it dialed in, but it took some of work: I had to adjust the rates, fix a screw on the canopy, and find a throttle limit amount that I was happy with. While it doesn’t have the control and smoothness of a high-end brushed quad like NewBeeDrone’s AcroBee Lite, it does really rip up a race course—if you can keep it under control long enough to finish. The need to tweak it to my liking means it’s probably not the best choice for a beginner, but an experienced racer who doesn’t mind tuning will find it fun and competitive.

At least with the example sent to us, the performance is crippled by a strongly under-performing VTx. It would be tough to race this particular Mobula6 with other pilots at the same time, which is a shame. Hopefully this is a one-off issue with our unit and others work better. Despite this being the 25,000Kv race model, it doesn’t really compare to the BetaFPV Meteor65 22,500Kv. BetaFPV’s racer is definitely a level above the Mobula6 in terms of power, and I’d give the Meteor65 an edge in handling as well. But the Mobula6 is considerably more efficient, offering 25% more flight time than the Meteor. If you’re not interested in outright power, both the Mobula6 and the Meteor65 are available with more efficient 19,000Kv motors instead.

The Mobula6 can be purchased at Banggood.

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