How to Make a 3D-Printed RC Plane
A 3D-printed RC plane is printed in thin-walled sections, usually from lightweight PLA, glued together over carbon spars and fitted with standard RC electronics. The airframe design matters more than the printer: start from a proven printable design with tested print settings. This guide covers designs, materials, printer settings, assembly and the first flight.
By Kyle HilsonUpdated: October 20269 min read
Start with a proven design
Printed planes only fly well when the parts are light, and printing light parts requires designs made for it: single-wall outer skins with an internal lattice, printed in “vase” or special modes. Designers such as 3DLabPrint and Eclipson publish printable planes with build manuals and print profiles; many free designs exist too. For a first project, pick a trainer, glider or simple sport plane with plenty of finished builds and photos from other pilots.
If you don’t fly yet, learn on a foam trainer first: a printed plane is slow to replace after a crash. The RC airplanes guide explains how to learn.
Filaments
| Filament | Properties | Use |
|---|---|---|
| Lightweight PLA (foaming) | Expands when printed hot; much lighter per part | Wings, fuselage skins |
| Standard PLA | Stiff, easy to print, heavier, softens in hot cars | Small parts, early test prints |
| PETG | Tougher, more heat-resistant, slightly heavier | Motor mounts, landing gear parts |
| TPU | Flexible | Bumpers, wing tips, hinges on some designs |
Keep a finished printed plane out of hot cars in summer: PLA can soften and parts warp.
Printer settings
- Use the designer’s profiles: wall count, extrusion width and temperature are tuned to make the parts light.
- Calibrate flow first: lightweight PLA needs reduced flow; too much and parts get heavy, too little and walls separate.
- Bed size: many designs are split to fit a 200 × 200 mm bed; check before you buy a design.
- Weigh every part and compare with the designer’s listed weights. A wing printed 30 % too heavy will fly noticeably worse.
- Dry filament: damp filament prints weak, stringy parts.
Assembly
- Test-fit all sections before gluing; remove stringing and sand joint faces lightly.
- Glue wing sections over the carbon spar tube or rod with medium CA or the glue the designer recommends, on a flat surface so the wing stays straight.
- Join fuselage sections using the alignment features in the design; check straightness from above and from the side.
- Hinge the control surfaces with the method the design uses (printed hinges, tape or pinned hinges) and check they move freely.
- Reinforce high-load points (motor mount, wing attachment, landing gear) as the manual describes.
Electronics
Printed planes use normal RC parts: a brushless motor and ESC, micro or mini servos, a receiver and a LiPo. Follow the design’s recommended motor and prop, or size them yourself with our guide to sizing an electric motor. Keep the ESC in airflow, and route wires through the channels the design provides.
Balance and first flight
- Set the centre of gravity exactly as specified, with the flight battery installed.
- Check control directions and throws on low rates.
- Look along the wing for twist before flying.
- Choose a calm day and a soft landing area; printed parts crack on hard landings.
- Carry CA glue: small cracks are quick to repair at the field, and damaged sections can be reprinted.
FAQ
Can any 3D printer print an RC plane?
Most well-calibrated FDM printers with a 0.4 mm nozzle and a bed of about 200 × 200 mm can. Accurate flow calibration matters more than the printer brand.
Are 3D-printed RC planes heavier than foam planes?
Usually somewhat heavier than a comparable foam plane, which makes them fly a little faster. Lightweight PLA and good designs keep the difference small.
How long does it take to print a plane?
Typically dozens of hours of printing in total, spread over many parts, plus a few evenings of assembly.
Is a 3D-printed plane good for beginners?
Building it, yes; learning to fly on it, not ideal. Printed parts break more easily than foam, so learn on a foam trainer and print your second plane.
More on this topic: other building methods and learning to fly are covered in the complete RC airplanes guide.
About 20 years in RC. Mostly boats in the NAVIGA Mini Eco Expert class, with many self-made parts; also a King Motor Baja 5B, a home-built electric plane, home-built nitro planes he has flown, and an RC helicopter. More about SwellRC
