3d Printed Nanolongrange FPV Drone With DJI O4

This is an evolution of my NLR35 nanolongrange FPV drone design. It features a new camera mount for DJI's O4 air unit. With this new digital video transmitter you get crystal clear full HD image in your FPV goggles up to 10km distance. Moreover, you can record 46 60fps footage on the transmitter.

This build requires basic knowledge in 3d printing and FPV drones.

1. PETG
2. Betafpv Matrix AIO
3. 1203 11500kv motors
4. DJI O4 air unit
5. nano GPS
6. Gemfan 3018 props
7. LiIon 18650/21700
8. u.fl omni-antenna
9. m2 screws

Tools

1. 3d printer
2. soldering iron
3. spot welder
4. cutter
5. screwdriver
6. rubber bands

You can get the .stl files for 3d printing the frame on thingiverse and printables. I used PETG as printing material and 20% infill for my slicer settings.

The 3d printed frame features mounting holes for motors, the AIO flight controller and the O4 air unit. Use M2 screws to mount.

1. First solder motor wires and GPS to AIO
2. Then put O4 air unit first on frame. Install camera with included adapter in camera mount.
3. Put the AIO on top of the O4 air unit. Connect O4 air unit and AIO with included plug.
4. Mount AIO and air unit with M2 screws to frame. Use silicone dampener between both boards.
5. Mount motors on frame (2x screws per motor)
6. Use a small rubber band to hold secure the GPS on one arm. Ensure, that the ceramic antenna faces upwards.
7. Install a zip tie to hold the antenna with a piece of tape in place.
8. Dry weight should be around 60g

The flight controller comes with basic Betaflight setup. Connect the flight controller with a computer and go to https://app.betaflight.com/ for the individual setup. Basic knowledge is required, I will just point out some specifics to this build:

1. enable GPS: Matrix 3in1 doesn't come with GPS software. You need to update and add GPS to the new firmware. If you can't update, remove the 5V cable to the GPS.
2. after the update, enable GPS at UART2.
3. ensure correct motor position and spinning direction
4. setup your radio and OSD

You are ready to fly! For the full nanolongrangeexperience you should use 18650 or 21700 Liion cells. I recommend cells from Molicel like P30b and P50b.

I hope you enjoyed this (documentation of) build!