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Lippisch reverse-delta ground-effect craft

Name: Lippisch reverse-delta ground-effect craft dimension sheet
Creator: Xem Studio
License: https://creativecommons.org/licenses/by/4.0/

Why does the Lippisch WIG use a reverse delta wing? · Standard part · basis: Design rules and figures from the cited sources; example geometry by Xem Studio

Also called: lippisch wig, reverse delta ground effect, x-113, lippisch ekranoplan, airfish wig, reverse delta wing rc wig, lippisch planform, ground effect boat wing, wig craft rc model

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

sizes: 7 in table

Notes

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.

Lippisch reverse-delta ground-effect craft size chart

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

Where the files are

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

Progress in Aerospace Sciences (K.V. Rozhdestvensky, 2006)	Wing-in-ground effect vehicles (review)	web	Publisher's page; dimensions are facts
Frontiers in Aerospace Engineering (2022)	Review of ground-effect experiments on rectangular, reverse-delta and delta wings	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

lippisch-reverse-delta-wig-wing

Lippisch reverse delta: straight leading edge, trailing edge swept forward to the tips, span 700, root 400 mm, anhedral 15°, endplates 40 mm (scale to your craft)

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Plain text: sheet.txt · JSON: /api/geometry?object=lippisch-reverse-delta-wig