Acrobrat Duo 3" 4K

By NicJ on Aug 31, 2020

4  124  6

This is an Acrobrat Duo frame with a Lumenier FC/ESC/VTX stack and a RunCam Hybrid 4K FPV+DVR.

The quad weighs about 209g (without a battery), and I've been flying with a 850mAh (106g) 4S RDQ battery.

After building it, I see that it's eerily similar to this FPVCrate build, and that's probably because I got inspiration from several other builds on RotorBuilds that used similar parts. It all goes together great on the Acrobrat Duo frame!

This is the first 3" frame I've built, and I'm really enjoying its nimbleness. It will last for 5-6 minutes on the 850mAh battery and takes great 4K(30) or 2.7K(60) footage.


Part List


Ummagawd Acrobrat Duo 3" Frame

Flight Controller

Lumenier LUX MINI F7 Flight Controller (7 builds)


Lumenier Micro Razor 4in1 20x20 F3 BLHeli_32 30A 2-6s ESC (5 builds)


4 x T-Motor F1507 3800Kv Micro Motor (3 builds)


HQ Prop 3x4x3 Durable Tri-Blade 3" Prop 4 Pack - Choose Your ColorPurple (4 builds)

FPV Camera

RunCam Hybrid - Dual 4K HD & FPV Camera (17 builds)

FPV Transmitter

Lumenier LUX Mini 20x20 5.8GHz FPV Video Transmitter (25-800mW) (11 builds)


Lumenier AXII 2 MMCX 5.8GHz Antenna (RHCP)


TBS Crossfire Immortal T Antenna V2 (6 builds)


TBS Crossfire Nano Rx (764 builds)


RDQ Series 14.8V 4S 850mAh 75C LiPo Micro Battery - XT30 or XT60 (24 builds)


FrSky 2.4GHz ACCST TARANIS X9D PLUS Digital Telemetry Radio System (Mode 1)


Fatshark Dominator HD3 Core 3D FPV Goggles with HDMI DVR Support Head Tracker (72 builds)

Misc Parts

Multirotor Foam Landing Pad 4 Pack - Choose Your Color (6 builds)

Radio Module

TBS Crossfire TX LITE (3 builds)

Battery Charger

HOTA D6+ 325W 15A 1-6S Dual Channel AC/DC Smart ChargerDefault Title (3 builds)


Hakko FX888D-23BY Digital Soldering Station FX-888D FX-888 (blue & yellow) (29 builds)
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lorenzo220580   27 days ago  

why the vtx antenna in this place?

Show 2 more comments
NicJ   27 days ago 

Thanks! I may try to get an extension cable and route it up.

Jodie Froster   27 days ago 

The issue isn't that it needs to be on top. If anything, BOTTOM is better, since MOST of the time the quad is above you. The issue is attenuation to the frame. If it's not distorting, or causing interference in your video, I say leave it. It may be a little VOULNERABLE run across the bottom like that, for landings. On that note: your front and rear motor wires are in preeeeeety sketchy proximity to your rear props.
Honestly the vtx antenna thing was my first question too, but if the signal is clear, there's no need to change it.

NicJ   22 days ago 

Ah, makes sense! Yeah I'm a little worried about it getting scuffed up on landings. I've added some additional landing pads around it.

The motor wires are about 0.75" away from the props and don't move, I'm not to worried about them getting chopped.

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