# Elevon

> What are elevons?

- Category: Aircraft design › Control surfaces
- Kind: Standard part
- Basis: Design rules and figures from the cited sources; example geometry by Xem Studio
- Page: https://xemstudio.com/objects/elevon/ · JSON: https://xemstudio.com/api/geometry?object=elevon · Plain text: https://xemstudio.com/objects/elevon/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files Xem Studio Design License (free to use and sell from, not to redistribute as files: https://xemstudio.com/license/)
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

**Exact dimensions.** True size, with no printing tolerance added.

## Notes

- Elevons combine elevator and aileron: both move together for pitch and opposite for roll, which is how tailless wings and deltas are controlled.
- Concorde used only six elevons, replacing elevators and ailerons, with no flaps or slats, where subsonic wings may have more than 50 movable devices (Heritage Concorde).
- McCombs notes free-flight scale models can trim glide turns with elevons (Model Aviation).
- Used on: Concorde.
- The file is a reference example built by Xem Studio from the numbers above. Sizes the sources do not fix are illustrative; scale the example to your own vehicle.

## Sizes

| parameter | value or range | source |
|---|---|---|
| Concorde | 6 elevons; no flaps or slats | Heritage Concorde |
| Reference build | chord 200, 20% elevon, 15 deg | illustrative |

## Where the files are

- Heritage Concorde: [The Wing](https://www.heritageconcorde.com/the-wing) — web — Publisher's page; dimensions are facts
- Model Aviation (AMA), W.F. McCombs: [Wing and Tail Dihedral for Models (Dec 1994)](https://library.modelaviation.com/article/wing-and-tail-dihedral-models) — web — Publisher's page; dimensions are facts

## Free STEP/STL (1 parts, Xem Studio Design License, Xem Studio)

Index: https://xemstudio.com/files/hardware/elevon/index.json · license: https://xemstudio.com/files/hardware/elevon/LICENSE.md

- elevon-wing-segment: [STEP](https://xemstudio.com/files/hardware/elevon/elevon-wing-segment.step) · [STL](https://xemstudio.com/files/hardware/elevon/elevon-wing-segment.stl) — elevon: wing segment 200 mm chord × 300 mm, 20 % chord surface deflected 15°

## Questions

**Why do flying wings use elevons?**

With no tail, the wing's trailing-edge surfaces must do both pitch and roll (Heritage Concorde).

## Fits with

- [Aileron](https://xemstudio.com/objects/aileron/)
- [Frise aileron](https://xemstudio.com/objects/frise-aileron/)
- [Differential ailerons](https://xemstudio.com/objects/differential-ailerons/)
- [Flaperon](https://xemstudio.com/objects/flaperon/)
- [Spoiler](https://xemstudio.com/objects/spoiler/)
- [Trim tab and antiservo tab](https://xemstudio.com/objects/trim-tab/)