WIG hulls: steps, hydrofoils and hydroskis — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/wig-hull-steps-hydrofoils/  (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
- WIG craft must break free of water drag before flying. Designs used hull steps (m-Sky 2), front and stern hydrofoils to soften water landing (Lippisch X-114), bow hydroskis for pitch stability (Lockheed 1963) and aft ski structures to trim take-off and landing (Douglas DAW-S) (Rozhdestvensky).
- Weiland proposed hydroskis as an alternative to power augmentation, and the Hoverwing HW20 used a static air cushion with retractable skirts only for take-off (Rozhdestvensky). KM operated in waves up to 3 m at take-off (Rozhdestvensky).
- Used on: Lippisch X-114, m-Sky 2, Douglas DAW-S, Hoverwing HW20.
- 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
Lippisch X-114  two front hydrofoils + one stern  Rozhdestvensky 2006
Lockheed wingship study  V-shaped landing hydrofoil, 4.64 m span  Rozhdestvensky 2006
m-Sky 2  step on centre-body bottom  Rozhdestvensky 2006
KM take-off wave height  up to 3 m  Rozhdestvensky 2006
Hoverwing HW20  static cushion, retractable skirts for take-off  Rozhdestvensky 2006

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

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