Copter Parts aims to make it easy and affordable to build autonomous quadcopters for learning, experimentation, and recreational flying.
- Free STL file downloads are available in the Download Parts section. All STL files use millimeter units.
- The CAD models behind the STL files are parametric, allowing easy customization of part dimensions. Requests for alternative sizes are welcome!
- Material guidance is provided in the Materials section.
- Assembly instructions with illustrations can be found in the Assembly section.
- 3D printing advice includes infill settings, print orientation, and support structure recommendations.
- All parts are printable using standard home or hobby 3D printers.
Alternatively, parts can be produced by commercial print shops. Costs may be as low as $100 or less for a complete set. Two services I’ve used are:
- PCBWay (China)
- 3D Printing Tech (Atlanta, Georgia)
NEW – Version 2 Parts
New Version 2 components are now available for download. In most cases, these parts are interchangeable with the original versions.
Fuselage
- Walls are 1 mm thinner, reducing weight while maintaining strength.
- Machine screw holes are now self-tapping:
- Standard metal M3 machine screws will tap threads directly into the fuselage.
- Avoid over-tightening. After threads are formed, screws may be replaced with nylon alternatives.
- Manual tapping is no longer required when using metal screws.
- Wire passthrough holes have been enlarged to accommodate new “capsule” profile arms.
- Electronics mount standoffs are taller for improved clearance.
- Spring latch support notches added beneath the lid seat.
- Includes 30.5 mm × 30.5 mm mounting area for ESCs or power distribution boards.
Arms
- New “capsule” profile arms:
- Allow internal mounting of standard 20 A ESCs for cleaner wiring and body space optimization.
- End caps available to secure electronics in the arms.
- Motor mounting plate is 2 mm larger, improving access to M3 nylock nuts.
- Oversized motor mounting plates available to match the new arm profile.
Fuselage Lids
- Two lid styles:
- A version with an integrated spring-loaded latch.
- A version with four screw holes.
- Spring-latch lid includes a tab that fits into the fuselage notch opposite the latch side.
Battery Trays
- New trays feature thinner walls, reducing weight without compromising strength.
Landing Gear
- Updated gear is larger and stronger, improving stability.
- Now solid rather than hollow, enabling higher strength when printed with infill.
Builders are free to use any electronics that fit the frame. Supported motor mounting dimensions are 16mm and 19mm. I’ve also included examples of quadcopters I’ve built using these parts.
Typical components—such as motors, ESCs, flight controller, radio receiver, GPS, current sensor, and Remote ID—must be selected and installed by the builder. First-time builders may find this challenging, so I recommend checking online guides and community support forums for help.
Once built, the quadcopter must be configured and tuned using the flight controller’s firmware. This critical step isn’t covered in this documentation. Each firmware has its own learning resources to guide you.
Please note: Copter Parts assumes users have basic familiarity with sUAS equipment, including control radios, battery safety, and local flight regulations. We accept no liability for drone operation by others.
💬 Questions are always welcome—don’t hesitate to reach out!