Fantrainer 50mm EDF
Published: July 31, 2026
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Well, this my version of the fabulous Fantrainer.
The RFB Fantrainer (or Fan Trainer) is a two-seat flight training aircraft which uses a mid-mounted ducted fan propulsion system. Inspired by this jet I made an RC variant of it with a 50mm EDF.
The plane has an easy to handle character, very easy to handlaunch and belly land.It can handle the wind nicely but will also glide like semi glider. A very broad flight envelope. The build is easy, use small pieces of filament as fitting pins on assembly with CA glue.
Flight times are long when flying scale. 6 minutes on a 3s 1300 (100gr) what i prefere.
1300 4s is 9 minutes. I have used up to 1600 4s of 200gr.
The wingspan is 850mm. Weight excl. Lipo is about 450 gramms.
- Thrusttube tail with rudder as option 1
- 50mm edf housing tail with rudder as option 2
- or original tail, no rudder as option 3
Video of a prerelease version with a bit of damage on nose and bit of rough landing.
https://youtu.be/yos8PJPcmBI?si=ZwDSJhO0iOfA1Nu5
Parts:
50mm EDF
~40A esc
3 x 9gr servos, no rudder.
3.5 mm carbon rod is optional for ripping style flying. The rod channel works already as reinforcement for normal scale flying.
CG to start is ~ 1 cm before Fuse 3 and 4 joint.
3d pint settings:
Active foaming LW pla.
1 wall
2 top 2 bottom
3% grid infill or gyroid.
Print tail piece with servo elevator with 6% or 2 walls for more stifness and durability.
