Ekranoplan layout (low wing + high tailplane out of ground effect) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/ekranoplan-wing-tail-layout/  (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 airplane-type ekranoplan pairs a low-AR main wing in ground effect with a high tailplane kept outside ground influence; the KM's tail area reached up to 50% of the wing's, reduced to 27% on the MPE-400 using S-shaped central sections (Rozhdestvensky).
- The KM (Caspian Sea Monster) had 550 t take-off weight, length over 90 m, AR 2 and cruise above 500 km/h, using eight 10 t forward engines for PAR take-off and two for cruise (Rozhdestvensky).
- Orlyonok (120 t, AR 3) and Loon (400 t, 74 m, AR above 3) followed the same layout (Rozhdestvensky).
- Used on: KM (Caspian Sea Monster), Orlyonok, Loon, MPE-400.
- 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
KM tail area / wing area  up to 50%  Rozhdestvensky 2006
MPE-400 tail / wing  27%  Rozhdestvensky 2006
KM: TOW / length / AR / cruise  550 t / >90 m / 2 / >500 km/h  Rozhdestvensky 2006
Orlyonok: TOW / length / AR  120 t / 60 m / 3  Rozhdestvensky 2006
Loon: TOW / length / cruise  400 t / 74 m / 450 km/h  Rozhdestvensky 2006
Reference build  span 600, root 300 (AR 2), endplates 40  computed (KM AR)

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/ekranoplan-wing-tail-layout/index.json
API: https://xemstudio.com/api/geometry?object=ekranoplan-wing-tail-layout