# Beriev Be-2500 Neptun (ground-effect super-heavy amphibian concept)

> What are the dimensions of the Beriev Be-2500 Neptun?

- Category: Ground-effect craft › Concept wingships (unbuilt)
- Kind: Modern device
- Basis: Secondary source: Wikipedia, GlobalSecurity.org (copy of the maker's figures; the maker publishes none directly)
- Page: https://xemstudio.com/objects/beriev-be-2500-neptun/ · JSON: https://xemstudio.com/api/geometry?object=beriev-be-2500-neptun · Plain text: https://xemstudio.com/objects/beriev-be-2500-neptun/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
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## Overall (mm)

| length | width | height |
|---|---|---|
| 123000 | 156000 | 29120 |

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

## 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.

## Sizes

| 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 |

## Where the files are

- Wikipedia: [Beriev Be-2500](https://en.wikipedia.org/wiki/Beriev_Be-2500) — web — Publisher's page; dimensions are facts
- GlobalSecurity.org: [Beriev Be-2500 specifications](https://www.globalsecurity.org/military/world/russia/be-2500-specs.htm) — web — Publisher's page; dimensions are facts

## Free STEP/STL (1 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/beriev-be-2500-neptun/index.json

- beriev-be-2500-neptun-envelope: [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) — Envelope 123000 × 156000 × 29120 mm (Real craft: overall length × wingspan × overall height as published (Wikipedia figures); unbuilt concept)

## Questions

**How big would the Be-2500 have been?**

Wikipedia gives 123 m long, 156 m span and 29.12 m high; GlobalSecurity gives 115.5 m × 125.51 m.

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