Anhedral angle — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/anhedral/  (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/)
Basis: Design rules and figures from the cited sources; example geometry by Xem Studio
Catalog version: 2026-10-20

Sizes: see table below
- Anhedral (tips below root) reduces roll stability; it is used on swept and high-wing designs that already have too much stable dihedral effect, and on fighters for roll rate (ERAU; NASA Glenn).
- Jets like the Harrier, Jaguar and Alpha Jet combine high wings, sweep and anhedral to get a small stable net effect; on a straight-wing light airplane anhedral 'will almost undoubtedly' make it laterally unstable (Kitplanes).
- On ground-effect craft anhedral tips trap a high-pressure air tunnel; a reverse-delta study chose 15 deg anhedral (Frontiers 2022 review).
- Used on: C-5 Galaxy, Harrier, SEPECAT Jaguar, Alpha Jet, Wright 1903 Flyer.
- 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.

parameter  value or range  source
Wright 1903 Flyer  slight anhedral  NASA Glenn
WIG reverse-delta study  anhedral 8-45 deg tested; 15 deg selected  Frontiers 2022 review
Reference build  high swept wing, -3 deg  illustrative

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Embry-Riddle (Leishman), Introduction to Aerospace Flight Vehicles: Wing Shapes and Nomenclature — web — Publisher's page; dimensions are facts — https://eaglepubs.erau.edu/introductiontoaerospaceflightvehicles/chapter/wing-shapes-and-nomenclature/
- NASA Glenn Research Center: Beginner's Guide to Aeronautics: Wing Geometry — web — Publisher's page; dimensions are facts — https://www1.grc.nasa.gov/beginners-guide-to-aeronautics/wing-geometry
- Kitplanes (B. Wainfan): Wind Tunnel: Roll's role in lateral stability (2008) — web — Publisher's page; dimensions are facts — https://www.kitplanes.com/wind-tunnel-135/
- Frontiers in Aerospace Engineering (2022): Review of ground-effect experiments on rectangular, reverse-delta and delta wings — web — Publisher's page; dimensions are facts — https://www.frontiersin.org/journals/aerospace-engineering/articles/10.3389/fpace.2022.975158/pdf

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/anhedral/index.json
API: https://xemstudio.com/api/geometry?object=anhedral