Library › Aircraft design › Wing planforms ·
Mid wing placement
What are the advantages of a mid-mounted wing? · Standard part · basis: Design rules and figures from the cited sources; example geometry by Xem Studio
Also called: mid wing, mid wing aircraft, mid wing rc plane, mid wing aerobatic, mid wing vs low wing, mid wing interference drag, pattern plane wing position, 3d plane wing position
Exact dimensions. True size, with no printing tolerance added.
- sizes
- 4 in table
Notes
- A mid wing meets the fuselage at right angles, which wind-tunnel reports favoured for low interference drag (US Naval Institute, Corsair design history).
- With ailerons, McCombs recommends 'essentially 0 deg' effective dihedral for mid-wing and biplane RC models, and 7-8 deg for rudder-only mid-wing models (Model Aviation). That near-neutral roll response suits aerobatic aircraft (Kitplanes).
- A mid wing's spar crosses the fuselage, which can be awkward; the Corsair's designers avoided a long, heavy landing gear by bending the wing instead (USNI).
- 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.
Mid wing placement size chart
| parameter | value or range | source |
|---|---|---|
| RC with ailerons, mid wing | essentially 0 deg | McCombs 1994 |
| RC rudder-only, mid wing | about 7-8 deg | McCombs 1994 |
| FF scale, mid wing EVD | 0-5 deg | McCombs 1994 |
| Reference build | 1000 x 200 mm, 0 deg dihedral | McCombs |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| US Naval Institute, Naval History Magazine | Designing the Bent-Wing Bird (Feb 1995) | web | Publisher's page; dimensions are facts |
| Model Aviation (AMA), W.F. McCombs | Wing and Tail Dihedral for Models (Dec 1994) | web | Publisher's page; dimensions are facts |
| Kitplanes (B. Wainfan) | Wind Tunnel: Roll's role in lateral stability (2008) | web | Publisher's page; dimensions are facts |
Free files
★ Free files 1 parts. Xem Studio design: free to use, print and sell things from; not to be republished as files. Xem Studio Design License. index.json
| mid-wing-wing | rectangular planform: span 1000, root 200, tip 200 mm, LE sweep 0°, dihedral 0°, NACA 0012 | STEP · STL |
https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.Plain text: sheet.txt · JSON: /api/geometry?object=mid-wing

Fits with
Questions
Why do aerobatic RC planes use mid wings and no dihedral?
Near-neutral roll stability gives crisp, uncoupled rolls (Kitplanes; McCombs gives ~0 deg).





