Lippisch reverse-delta ground-effect craft — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/lippisch-reverse-delta-wig/  (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's planform has chord decreasing linearly from root to tip, which limits the longitudinal shift of the centre of pressure with height, combined with moderate AR above 3, inverse dihedral to hold the hull above water, and a large high tailplane (Rozhdestvensky).
- The X-113 reached L/D around 25 (Rozhdestvensky). Experiments show the reverse delta has delayed stall and higher L/D than a regular delta, and in ground effect its tip-vortex circulation rose 65% (Frontiers 2022 review).
- Effective in-ground-effect height for reverse deltas is given as below about 40-45% of chord, and 15 deg anhedral was selected in one study (Frontiers 2022).
- Used on: Lippisch X-113, Lippisch X-114, Airfish-3.
- 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
X-113 L/D  about 25  Rozhdestvensky 2006
X-114 weight  1.35 t  Rozhdestvensky 2006
Lippisch AR  above 3  Rozhdestvensky 2006
Selected anhedral (study)  15 deg  Frontiers 2022
Effective height  < 40-45% chord  Frontiers 2022
Reverse delta CLmax  1.175 at 38 deg  Frontiers 2022
Reference build  span 700, root 400 (AR 3.5), anhedral 15 deg, endplates 40  computed

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/lippisch-reverse-delta-wig/index.json
API: https://xemstudio.com/api/geometry?object=lippisch-reverse-delta-wig