Library › Ground-effect craft › Soviet experimental and scale prototypes ·

Alexeyev SM-5 ekranoplan (1/4-scale KM test craft)

What are the dimensions of the Alexeyev SM-5 ekranoplan? · Modern device · basis: Secondary source: Old Machine Press (copy of the maker's figures; the maker publishes none directly)

Also called: sm-5 ekranoplan dimensions, sm-5 alexeyev size, sm-5 scale km, sm-5 wingspan, alexeyev test ekranoplan sm-5, СМ-5 экраноплан, sm-5 ekranoplan especificaciones, SM-5 Bodeneffekt Versuchsträger

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

length
18000 mm
width
9500 mm
height
5500 mm

Notes

  • The SM-5 was a quarter-scale manned model of the KM used to prove the configuration before the full-size craft flew; it was lost in a 1964 accident.
  • The file is an 18.0 × 9.5 × 5.5 m box from Old Machine Press. Wing area is not published.
  • Marked secondary (magazine-style history site).
  • True size, no printing tolerance added. Only published numbers are used; anything not published is said so.
  • Secondary source: the numbers come from a retailer or magazine copy of the maker's specification.

Alexeyev SM-5 ekranoplan size chart

dimensionvalue
Length18.0 m (59 ft 1 in)
Wingspan9.5 m (31 ft 2 in)
Height5.5 m (18 ft 1 in)
Maximum weight7,300 kg (16,094 lb)
Engines2 × Mikulin KR7-300 jet engines
Ground-effect flying height1–3 m (3–10 ft)
Role25% scale aerodynamic test craft for the KM

Where the files are

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

Old Machine PressAlexeyev KM Ekranoplan – Caspian Sea Monster (SM-5 section)webPublisher's page; dimensions are facts

Free files

★ Free files 1 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

alexeyev-sm-5-ekranoplan-envelopeEnvelope 18000 × 9500 × 5500 mm (Real craft: overall length × wingspan × overall height as published)STEP · STL
Let your AI pull this. Add https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.
Set it up →

Plain text: sheet.txt · JSON: /api/geometry?object=alexeyev-sm-5-ekranoplan

length
Schematic, not to scale.

Fits with

Questions

How big was the SM-5?

18.0 m long, 9.5 m wingspan and 5.5 m high, with a 7,300 kg maximum weight.