Yonas Beyer
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2026 · In progress

Ultralight 6" FPV build

A self-built 6" long-range drone under 400 g. How closely can I stick to the weight budget, and is the target even possible?

Year
2026
Status
In progress
Tools
Betaflight, PIDtoolbox
Ultralight 6" FPV build

Idea

Long range on 7.5” is too big and too loud. My new 6” build is meant to solve both problems. Of course, the drone should still look cool and be practical – which is why I put so much effort into the Bluetooth module.

Build

The base is the ultralight “Raptor6” frame from ProtoFPV. On top of it go lightweight motors from Vulcan Innovations (VCI), an AIO from Flywoo and a Radiomaster RP4TD. Of course, a GNSS module and a camera with a video transmitter can’t be missing either. As an extra, I’m flashing a SpeedyBee Bluetooth module with custom firmware, so I can control action cameras from my radio.

Current status

The SpeedyBee module has been successfully reprogrammed. The drone is fully assembled and already flies well. All that’s left now is the filter and PID tuning.

Progress

07 / 07Tuning

  1. 01Idea(done)
  2. 02Part selection(done)
  3. 03Bluetooth module(done)
  4. 04Delivery(done)
  5. 05Build(done)
  6. 06Maiden flight(done)
  7. 07Tuning(current)

Weight budget

382.8 gweighed · Target 400 g · Headroom to target: 17.2 g

Weight budget
Frame ProtoFPV Raptor6112 g
TPU partsapprox. 25 g
Motors VCI (4×)141.2 g
AIO Flywoo GOKU GN745 V39.4 g
Receiver Radiomaster RP4TDapprox. 3.7 g
GNSS module4.7 g
DJI O4 Pro (camera and video transmitter)36.2 g
Bluetooth module SpeedyBee1.1 g
Propellers (4×)21.2 g
Wires, screws, small partsapprox. 30 g
Sum of partsapprox. 384.5 g
Finished build, weighed382.8 g

Gallery

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