3" Red Black concept

By baze_fpv on May 24, 2019

9 20 3

I wanted to build small and slim 3" quad and I decided to use Alien frame for this build.
FC and ESC are installed side-by-side (not on top of each other) to make this build really slim.

I wanted to install FC and ESC side-by-side (which requires two 20x20 places), but this frame only had one 20x20 place. So I had to design additional 3D printed stands to make side-by-side installation possible. After these modifications distance between top and bottom plate is only 12mm.

I didn't paint the frame like I usually do (See my previous quads "Red-Black Tree" , "Bianco Arancione" or "Orange Pudang" ), but I did play around with colors red and black.

Custom 3D printed parts

Camera mount
VTX antenna mounts
ESC mount
All these parts can be found here https://www.thingiverse.com/thing:3654010

Other 3D printed parts

Arm protectors ( https://www.thingiverse.com/thing:3633602 )

Technical details

Smartaudio used to control the VTX
XM+ with RSSI

Updates

Updated to Betaflight 4.1 and JESC. Also enabled RPM filters and did some overall PID tuning.

"red/black concept refers to the careful segregation in cryptographic systems of signals that contain plaintext information from those that carry encrypted information" - https://en.wikipedia.org/wiki/Red/blackconcept

Photos

Part List

Frame	LEACO Micro Alien 3 Inch 135mm Carbon Fiber Frame Kit 2.5mm Arm for RC Drone FPV Racing (4 builds) Banggood.com	$20.37
Flight Controller	MAMBA F405 Mini Betaflight Flight Controller & F25 20A 3-4S DSHOT600 FPV Racing Brushless ESC (40 builds) Banggood.com	$43.99
Motors	4 x 4pcs EMAX 1306 RS1306 Version 2 RS1306B 2700KV/4000KV Brushless Motor 3-4S for RC MultiRotor Fpv Racing Drone Spare Part Aliexpress.com	See Site
Propellers	Emax AVAN Mini 3inch 3-blade Propellers Props Support RS1106 4500KV Brushless Motor suitable for Babyhawk 3 Aliexpress.com	$1.68
FPV Camera	Caddx Turbo EOS2 4:3 1200TVL 2.1mm 160 Degree 1/3 CMOS Mini FPV Camera NTSC/PAL For RC Drone (40 builds) Banggood.com	$14.90
FPV Transmitter	Holybro Atlatl 5.8G 40CH 25mW 100mW mini FPV Video Transmitter 19x16mm for RC FPV Racing Drone (6 builds) Banggood.com	$19.14
Receiver	Frsky XM XM+ Plus Micro D16 SBUS Full Range 2.4ghz Mini Receiver Up to 16CH for RC FPV Racing Drone w/ Antenna Aliexpress.com	See Site

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Discussion

HunterCustom May 29, 2019

What size standoffs did you use?

baze_fpv Jun 11, 2019

distance between top and bottom plate is 12mm.

Rice_Bowl May 26, 2019

YOOO THATS SICKKK i think i might use youre quad as a basis for mine!! its also cool that you used an eos2 because it does makes sense to use a 14x14 to make it slammed. Do you have a link to your 3d printed parts for the fc and camera mount?

baze_fpv May 26, 2019

Thanks :+1: . Just uploaded STL-files here https://www.thingiverse.com/thing:3654010 with instructions. Have fun building :)

Jodie Froster May 25, 2019

You have a LOT of unsupported top plate that's likely to crack from the weight of the battery when you crash, but HOOOO-SHEET does she ever look goooooooood!

Rice_Bowl May 26, 2019

just dont crash, how hard can it be hahahah. Ive used the same frame before in a build i havent shown but its possible to put something above the boards so when the topplate flexes, it has soemthing to lean on. I havent broken any toplates so far, but i did wreck the arms ahhaha.