2s35: The Ultimate 18650-Powered 3.5"–4" FPV Drone

Boost MeHello MakerWorld community 👋
If you find this model useful, I would really appreciate a boost. This design was developed with print reliability, clean geometry, and real-world applicability in mind, and it has been tested to work well on common printer setups. Boosts support further development and new free models. Thank you for your support and happy printing! 🚀🖨️

The 2s35 is a custom 3D-printed FPV drone frame designed around the longevity and accessibility of Li-ion 18650 batteries. Perfect for long-range cruising, cinematic flights, or park flying, this frame features a clever, integrated commercial battery tray that makes swapping packs as fast and easy as a traditional LiPo—no more tedious battery straps or loose cells.

 

## Technical Specifications

• Frame Type: 3D-Printed FPV Drone Frame
• Propeller Size: 3.5"to 4" (e.g., Gemfan 3520)
• Motor Mounting: 9mm hole distance
• Battery Configuration: 2S Li-ion (2x 18650 cells)

## Recommended Electronics & Hardware

Component	Recommendation / Compatibility
Flight Controller / ESC	Any 2s AIO (All-in-One) board rated for 20A or higher
Motors	High-KV micro motors (e.g., Happymodel 1404 4800KV)
FPV System	DJI O4  Air Unit / Camera
GPS Module	12mm or 18mm footprints supported (e.g., BZGNSS P18)
Battery Tray	Standard 2x 18650 commercial battery holder (buy 2s version!)

## Bill of Materials (BOM) & Tools Needed

To complete this build, you will need:

• 4 M2 heat inserts
• An assortment of M2 screws (various lengths depending on your print orientation)
• Silicon hookup wire
• Soldering iron and solder
• Wire cutters/strippers

## Print Settings & Assembly Tips

• Material: I used PLA+
• Walls/infill: I went for standard strength to save weight