Tandem-wing ground-effect craft (Jorg type) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/tandem-wig-configuration/  (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
- The Jorg tandem airfoil boat places two wings in ground effect one behind the other; its stability is 'very sensitive' to the combination of pitch angle and ground clearance (Rozhdestvensky).
- The 3-ton SM-1 tandem had a high take-off speed and a narrow range of stable heights (Rozhdestvensky). Ground-effect stability needs the aerodynamic centre in height upstream of the centre in pitch (Irodov criterion, Rozhdestvensky).
- Used on: Jorg TAB, SM-1.
- 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
SM-1 weight  3 t  Rozhdestvensky 2006
Stability  very sensitive to pitch/clearance; narrow stable height range  Rozhdestvensky 2006
Reference build  two 600 x 150 mm wings, endplates 30  illustrative

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/tandem-wig-configuration/index.json
API: https://xemstudio.com/api/geometry?object=tandem-wig-configuration