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Alexeyev KM 'Caspian Sea Monster' ekranoplan (1966)
What are the dimensions of the Caspian Sea Monster (KM ekranoplan)? · Modern device · basis: Secondary source: Wikipedia, Old Machine Press, GlobalSecurity.org (copy of the maker's figures; the maker publishes none directly)
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Exact dimensions. True size, with no printing tolerance added.
- length
- 92000 mm
- width
- 37600 mm
- height
- 21800 mm
Notes
- The KM (korabl-maket) was Rostislav Alexeyev's 544-tonne test ekranoplan, flown on the Caspian Sea from 1966 until its loss in 1980.
- The file is a 92.00 × 37.60 × 21.80 m box using the Wikipedia figures (sourced to Komissarov, Russia's Ekranoplans); Old Machine Press gives 97.4 m length and 22.0 m height, so the length varies by source.
- Figures come from encyclopedic and magazine sources, not a design-bureau drawing, so the entry is marked secondary.
- 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 KM 'Caspian Sea Monster' ekranoplan size chart
| dimension | value |
|---|---|
| Length | 92.00 m (302 ft) |
| Wingspan | 37.60 m (123 ft) |
| Height | 21.80 m (71.5 ft) |
| Wing area | 662.50 m² |
| Tailplane span (GlobalSecurity) | 37.00 m |
| Empty weight | 240,000 kg |
| Maximum take-off weight | 544,000 kg |
| Powerplant | 10 × Dobrynin VD-7 turbojets (8 canard/nose-mounted boost, 2 on the fin), 127.53 kN each |
| Maximum speed | 500 km/h |
| Cruise speed | 430 km/h |
| Range | 1,500 km |
| Ground-effect flying height | 4–14 m |
| Max sea state | 1.2 m wave height |
| Alternative figures (Old Machine Press) | Length 97.4 m (319 ft 7 in), height 22.0 m (72 ft 2 in), span 37.6 m; wing aspect ratio 2.0 |
| First flight | 16 October 1966 |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Wikipedia | Caspian Sea Monster (specifications, after Komissarov 2002) | web | Publisher's page; dimensions are facts |
| Old Machine Press | Alexeyev KM Ekranoplan – Caspian Sea Monster | web | Publisher's page; dimensions are facts |
| GlobalSecurity.org | Ekranoplan KM | web | Publisher'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-km-caspian-sea-monster-envelope | Envelope 92000 × 37600 × 21800 mm (Real craft: overall length × wingspan × overall height as published (Wikipedia/Komissarov figures); the box is a size envelope, not the hull shape) | STEP · STL |
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.Plain text: sheet.txt · JSON: /api/geometry?object=alexeyev-km-caspian-sea-monster
Questions
How long was the Caspian Sea Monster?
Wikipedia gives 92.00 m with a 37.60 m wingspan and 21.80 m height; Old Machine Press gives 97.4 m long.
How heavy was the KM ekranoplan?
240,000 kg empty and 544,000 kg maximum take-off weight.
How high did the KM fly?
In ground effect at 4–14 m above the surface.