Free depron RC airplane plans

Sukhoi Su-31

Sukhoi Su-31


The Sukhoi Su-31 is an aerobatic 3D plane that is intended for outdoor use. Build it from the plans attached below.

I have marked out a slot for the motor, but you might want to modify it to for your particular motor and mount. I have included a motor mount that fits the slot.

This is quite a large model, so make sure to user proper reinforcements on the wing and elevator, like stiff carbon fiber rods.

The dimensions of the slots and tabs are made for 6 mm depron.


Wing span
105 cm (41 inches)
98 cm (39 inches)
CoG location
5.7 cm (2.2 inches) behind wing leading edge

Build instructions

Not available.

Forum discussion


CAD images

Build images

Not available.

Model images




All my plans are published under a Creative Commons Attribution-NonCommercial-ShareAlike license.

You are free:

  • to Share — copy and redistribute the material in any medium or format
  • to Adapt — remix, transform, and build upon the material

Under the following conditions:

  • Attribution. — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
  • NonCommercial. — You may not use the material for commercial purposes.
  • ShareAlike. — If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.

In plain English this means that

  • you are free to download my plans and build airplane models from them
  • you may not use my plans for commercial purposes
  • if you make any changes to the plans and want to publish or share your version you have to
    • attribute me as the original designer with a link to this web site
    • release your version under the same or similar license to this one