{
 "version": "2026-10-20",
 "license": "Dimension sheets: CC BY 4.0. Standard and published-size files: CC BY 4.0. Xem Studio's own designs (files_license = Xem Studio Design License): free to use and sell things from, not to redistribute as files — https://xemstudio.com/license/. Other publishers' files: their own license, linked beside them.",
 "slug": "beriev-be-2500-neptun",
 "name": "Beriev Be-2500 Neptun (ground-effect super-heavy amphibian concept)",
 "kind": "modern",
 "category": "Ground-effect craft",
 "group": "Concept wingships (unbuilt)",
 "year": null,
 "question": "What are the dimensions of the Beriev Be-2500 Neptun?",
 "tags": [
  "ekranoplan",
  "wing in ground effect",
  "wig craft",
  "ground effect vehicle",
  "concept wingships (unbuilt)"
 ],
 "aliases": [
  "be-2500 dimensions",
  "beriev be-2500 wingspan",
  "be-2500 neptun size",
  "largest aircraft concept ground effect",
  "бе-2500 размеры",
  "be-2500 length",
  "be-2500 dimensiones",
  "be-2500 height"
 ],
 "overall_mm": {
  "length": 123000,
  "width": 156000,
  "height": 29120
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/beriev-be-2500-neptun/",
 "sheet_txt": "https://xemstudio.com/objects/beriev-be-2500-neptun/sheet.txt",
 "sheet": {
  "basis": "Secondary source: Wikipedia, GlobalSecurity.org (copy of the maker's figures; the maker publishes none directly)",
  "overall_mm": {
   "length": 123000,
   "width": 156000,
   "height": 29120
  },
  "notes": [
   "The Be-2500 was a Beriev study for a 2,500-tonne amphibian that could cruise in ground effect or at altitude; it was never built.",
   "The file is a 123 × 156 × 29.12 m box from Wikipedia. GlobalSecurity publishes a smaller 115.5 × 125.51 m planform with the same height, so dimensions depend on the design iteration.",
   "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."
  ],
  "table": {
   "columns": [
    "dimension",
    "value"
   ],
   "rows": [
    [
     "Length",
     "123 m (403 ft 7 in) — GlobalSecurity: 115.5 m"
    ],
    [
     "Wingspan",
     "156 m (511 ft 10 in) — GlobalSecurity: 125.51 m"
    ],
    [
     "Height",
     "29.12 m (95 ft 6 in)"
    ],
    [
     "Wing area",
     "3,428 m² — GlobalSecurity: 3,184 m²"
    ],
    [
     "Empty weight",
     "1,500,000 kg"
    ],
    [
     "Maximum take-off weight",
     "2,500,000 kg"
    ],
    [
     "Payload",
     "1,000,000 kg"
    ],
    [
     "Engines",
     "6 × Kuznetsov NK-116 turbofans, 172 kN each (proposed)"
    ],
    [
     "Maximum speed in ground effect",
     "450 km/h"
    ],
    [
     "Range in ground effect",
     "10,700 km"
    ]
   ]
  }
 },
 "sheet_text": "Beriev Be-2500 Neptun (ground-effect super-heavy amphibian concept) — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/beriev-be-2500-neptun/  (sheet CC BY 4.0)\nBasis: Secondary source: Wikipedia, GlobalSecurity.org (copy of the maker's figures; the maker publishes none directly)\nCatalog version: 2026-10-20\n\nOverall (mm): length 123000, width 156000, height 29120\n- The Be-2500 was a Beriev study for a 2,500-tonne amphibian that could cruise in ground effect or at altitude; it was never built.\n- The file is a 123 × 156 × 29.12 m box from Wikipedia. GlobalSecurity publishes a smaller 115.5 × 125.51 m planform with the same height, so dimensions depend on the design iteration.\n- Marked secondary.\n- True size, no printing tolerance added. Only published numbers are used; anything not published is said so.\n- Secondary source: the numbers come from a retailer or magazine copy of the maker's specification.\n\ndimension  value\nLength  123 m (403 ft 7 in) — GlobalSecurity: 115.5 m\nWingspan  156 m (511 ft 10 in) — GlobalSecurity: 125.51 m\nHeight  29.12 m (95 ft 6 in)\nWing area  3,428 m² — GlobalSecurity: 3,184 m²\nEmpty weight  1,500,000 kg\nMaximum take-off weight  2,500,000 kg\nPayload  1,000,000 kg\nEngines  6 × Kuznetsov NK-116 turbofans, 172 kN each (proposed)\nMaximum speed in ground effect  450 km/h\nRange in ground effect  10,700 km\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Wikipedia: Beriev Be-2500 — web — Publisher's page; dimensions are facts — https://en.wikipedia.org/wiki/Beriev_Be-2500\n- GlobalSecurity.org: Beriev Be-2500 specifications — web — Publisher's page; dimensions are facts — https://www.globalsecurity.org/military/world/russia/be-2500-specs.htm\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/beriev-be-2500-neptun/index.json\nAPI: https://xemstudio.com/api/geometry?object=beriev-be-2500-neptun\n",
 "sources": [
  {
   "publisher": "Wikipedia",
   "title": "Beriev Be-2500",
   "url": "https://en.wikipedia.org/wiki/Beriev_Be-2500",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "GlobalSecurity.org",
   "title": "Beriev Be-2500 specifications",
   "url": "https://www.globalsecurity.org/military/world/russia/be-2500-specs.htm",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "boeing-pelican-ultra",
  "aerocon-dash-1-6-wingship"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no printing tolerance)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no printing tolerance. Where a part meets another part, the object lists its mating features (feature, exact size, what it mates with, fit class: press, slide, run, socket, clamp or designed). Apply your process's allowance to those features only; 'designed' gaps are part of the design and stay as drawn.",
 "mating": [],
 "faq": [
  {
   "q": "How big would the Be-2500 have been?",
   "a": "Wikipedia gives 123 m long, 156 m span and 29.12 m high; GlobalSecurity gives 115.5 m × 125.51 m."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "beriev-be-2500-neptun-envelope",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/beriev-be-2500-neptun/beriev-be-2500-neptun-envelope.step",
   "stl": "https://xemstudio.com/files/hardware/beriev-be-2500-neptun/beriev-be-2500-neptun-envelope.stl",
   "note": "Envelope 123000 × 156000 × 29120 mm (Real craft: overall length × wingspan × overall height as published (Wikipedia figures); unbuilt concept)"
  }
 ],
 "markdown": "https://xemstudio.com/objects/beriev-be-2500-neptun/index.md"
}