Beriev Be-2500 Neptun (ground-effect super-heavy amphibian concept) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/beriev-be-2500-neptun/  (sheet CC BY 4.0)
Basis: Secondary source: Wikipedia, GlobalSecurity.org (copy of the maker's figures; the maker publishes none directly)
Catalog version: 2026-10-20

Overall (mm): length 123000, width 156000, height 29120
- 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.

dimension  value
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

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Wikipedia: Beriev Be-2500 — web — Publisher's page; dimensions are facts — https://en.wikipedia.org/wiki/Beriev_Be-2500
- GlobalSecurity.org: Beriev Be-2500 specifications — web — Publisher's page; dimensions are facts — https://www.globalsecurity.org/military/world/russia/be-2500-specs.htm

Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/beriev-be-2500-neptun/index.json
API: https://xemstudio.com/api/geometry?object=beriev-be-2500-neptun