Library › Aircraft design › Wing planforms ·

Gull wing

Name: Gull wing dimension sheet
Creator: Xem Studio
License: https://creativecommons.org/licenses/by/4.0/

What is a gull wing and why was it used? · Standard part · basis: Design rules and figures from the cited sources; example geometry by Xem Studio

Also called: gull wing aircraft, gull wing seaplane, gull wing rc plane, gull wing glider, pbm mariner wing, bent wing aircraft, gull wing dihedral, gull wing flying boat

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

sizes: 3 in table

Notes

A gull wing rises steeply from the root, then flattens outboard. On the PBM Mariner flying boat the gull wing 'kept the vulnerable engines out of the salt spray' and avoided the external bracing a parasol wing like the Catalina's needed (Smithsonian NASM).
Wainfan notes changes at the wingtips matter more for lateral stability than changes near the root, and part-span dihedral needs slightly more outer-panel dihedral to match a constant-dihedral wing (Kitplanes).
Used on: Martin PBM Mariner.
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.

Gull wing size chart

parameter	value or range	source
PBM Mariner wing	gull wing on deep hull; engines above spray	Smithsonian NASM
Part-span dihedral rule	outer panels need slightly more dihedral	Kitplanes (Wainfan)
Reference build angles	illustrative (no published angle fetched)	illustrative

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

Smithsonian National Air and Space Museum	Martin PBM-5A Mariner	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

gull-wing-wing

gull planform: span 1000, root 200, tip 120 mm, LE sweep 0°, dihedral 5°, NACA 2412

STEP · STL

Let your AI pull this. Add 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.

Set it up →

Plain text: sheet.txt · JSON: /api/geometry?object=gull-wing