December 26, 2025
Description
I’ve been wondering for a while: how small can you build a digital FPV drone that still records in 4K?
For this project I used a DJI O4 Air Unit and stripped away everything that wasn’t absolutely necessary.
The frame is designed so that the motors run in an extremely tight space. It was a fun project – nothing you’d really want to fly seriously – but in the end it turned out to be surprisingly agile.
Probably the smallest whoop you can currently build that’s still actually fun to fly.
But see for yourself in the video…
Parts Needed:
Matrix 1S Brushless Flight Controller: (https://s.click.aliexpress.com/e/_c40ZrCnR) (https://www.mepsking.shop/betafpv-matrix-1s-brushless-flight-controller-3-in-1.html?inviterId=1915291648945373186&utm_source=affiliate)
BetaFPV 0702 II 30000 KV Brushless Motors: (https://www.mepsking.shop/0702-ii-brushless-motors.html?inviterId=1915291648945373186&utm_source=affiliate&utm_medium=affiliate)(https://s.click.aliexpress.com/e/_c2wYuni1)
DJI O4 video transmitter: (https://amzn.to/44otxKT) (https://s.click.aliexpress.com/e/_c3FoI4aN)
Gemfan 31mm 1209-4 1mm Propeller Clear (https://s.click.aliexpress.com/e/_c3tV4OSH) (https://s.click.aliexpress.com/e/_c3PM8T3r)
BetaFPV 300mah 1S BT2.0 Battery: (https://s.click.aliexpress.com/e/_c42EHac1)
💥 exclusive 10% OFF code on Mepsking Motors: fpvgeek
Disclaimer: Some Parts provided for free by mepsking. All opinions are my own. Affiliate links help support the channel at no extra cost to you.
Frame:
PLA+ / PETG / ABS
Layer Height: 0.12mm
3 Walls
15% Infill
Support: Yes, normal
Camera Mount:
TPU
Layer Height: 0.12
2 Walls
15% Infill
Support: yes, tree
License:
Creative Commons — Attribution
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