Birdbrain RC Fortress 5 "Opulence"

By BirdbrainRC on Apr 14, 2020

25  470  2

After my first box frame cut turned out better than expected, I figured I might make a backup quad. At the same sort of time, my carbon supplier got in touch and mentioned their coloured carbon sheet, and with the Fortress frame being all cut from one thickness of CF I figured it could look pretty sweet, so I ordered a sheet and a bunch of components to put together a build, colour coordinated of course!

Build used an Aikon stack this time, which turned out to be slightly easier to package in the confines of the body than the Hobbywing stack I used in the first build. Whilst a bit of an awkward size means it won't be ideal in every quad, the Race Dragon ESC looks to be a really nice board coming in at a great price. The rest of the build is much the same as the first, the exception being a switch from Xing 2208s to 2306s for aesthetic reasons. If I build a third I might try the 2207s just to establish which of the three I prefer.

Once the sheet came, I tore straight into it - turned out that whilst the carbon itself cut butter smooth as I've come to expect, the silk strands which give it the coloured accents wasn't cutting cleanly, leaving me with a lot of work to do cleaning up the edges by hand with silicon carbide paper. The end result really looks great though, especially with gold prints and the Xing 2306 motors. Lockdown time well spent!


Part List

Flight Controller

Aikon F7 Flight Controller (4 builds)
See Site


Aikon Race Dragon RD32 45A 3-6S 4in1 ESC
See Site


4 x iFlight XING 2306 2-6S 1700KV Camo Race Unibell Motor
See Site


Gemfan Flash Durable 5144 3 Blade Props
See Site

FPV Camera

MY CART (2 builds)

FPV Transmitter

Matek 40CH VTX HV Video Transmitter (11 builds)
See Site


Menace Thrasher 5.8Ghz Antenna (SMA) (RHCP) (2 builds)
See Site


FrSky XM+ Micro SBUS Receiver (International firmware) (1149 builds)
See Site


Rhino 1000mAh 6S 50C Lipo Battery Pack w/XT60 (8 builds)

Misc Parts

4PCS FLYWOO Frame Arm LED Board Light 4/6 Bits 30/35/40mm 3-6S For RC Drone FPV Racing Multi Rotor (5 builds)
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Kstone   Apr 15, 2020  

Love the frame, please list the .STL

Kstone   Apr 15, 2020 

It maybe possible to 3D-Print the individual parts using Oynx (CF filled Nylon), while still maintaining the needed rigidity. Ineresting thing is that often this can save a bit of weight too. If you share the .stl files i can verify this as well as get an estimate of the cost / weight.

Side note: Most of my 3" builds are using Oynx, which has proved to be nearly indestructable.

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