Anhedral on ground-effect wings — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/wig-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
- Lippisch craft used inverse dihedral so the tips or sponsons touch the water while the hull stays above it, forming a high-pressure 'air tunnel' under the wing (Rozhdestvensky; Frontiers 2022).
- On a reverse-delta wing tested at 8-45 deg anhedral, 15 deg was selected; at h/c near 0 the anhedral configuration gave lift increases of 270% (8 deg) and 150% (45 deg) over free flight (Frontiers 2022 review).
- Used on: Lippisch X-113.
- 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
Anhedral tested / selected  8-45 deg / 15 deg  Frontiers 2022
Lift increase at h/c ~ 0  270% (8 deg), 150% (45 deg)  Frontiers 2022
Reference build  span 700, root 400, anhedral 15  Frontiers 2022

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Progress in Aerospace Sciences (K.V. Rozhdestvensky, 2006): Wing-in-ground effect vehicles (review) — web — Publisher's page; dimensions are facts — https://www.hassanhameed.com/wp-content/uploads/2016/01/wingingroundeffectvehicles-130120003005-phpapp01.pdf
- 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/wig-anhedral/index.json
API: https://xemstudio.com/api/geometry?object=wig-anhedral