Birdbrain RC Fortress 5 "Opulence"

By BirdbrainRC on Apr 14, 2020

24  465  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!

Photos

Part List

Flight Controller

Aikon F7 Flight Controller (4 builds)
Hobbyrc.co.uk
See Site

ESCs

Aikon Race Dragon RD32 45A 3-6S 4in1 ESC
Hobbyrc.co.uk
See Site

Motors

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

Propellers

Gemfan Flash Durable 5144 3 Blade Props
Quadcopters.co.uk
See Site

FPV Camera

MY CART (2 builds)
Foxeer.com
$36.00

FPV Transmitter

Matek 40CH VTX HV Video Transmitter (11 builds)
Hobbyrc.co.uk
See Site

Antenna

Menace Thrasher 5.8Ghz Antenna (SMA) (RHCP) (2 builds)
Hobbyrc.co.uk
See Site

Receiver

FrSky XM+ Micro SBUS Receiver (International firmware) (1529 builds)
Dronejunkie.co.uk
See Site

Batteries

Rhino 1000mAh 6S 50C Lipo Battery Pack w/XT60 (8 builds)
Hobbyking.com
$14.72

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)
Banggood.com
$5.99
Show stores (6)

Discussion

Sign in to comment

Kstone   Apr 15, 2020  
1

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.

Guides & Reviews

Jun 21, 2021

AirbladeUAV has done it again and this time they've brought long range to the 5" class! Based on the popular Transformer Mini, the new Transformer 5" Ultralight adopts a lot of the same design philosophies with larger props and more payload capacity. It can fly upwards of 20 minutes on a 4 cell Li-Ion battery pack and in ideal conditions it's got a range of over 4 to 5 miles. In this guide I'll walk..

Read more
Mar 04, 2021

With the release of the DJI FPV Drone cinematic FPV has become a lot more accessible, but you certainly don't want to crash a $750 drone! The QAV-CINE Freybott is a compact, lightweight cinematic FPV drone that can take a hit and keep going. It's a lot safer to fly indoors and around people. With a naked GoPro or the SMO 4k you can capture some great stabilized footage. In this guide I'll show you..

Read more