# Vostok parachutes 3D model

> Shape built from published dimensions and pictures; details simplified.

Free 3D model of Vostok parachutes, a crewed craft or station, built from published dimensions by Space Radar. 8,664 triangles, 121 kB glTF, MIT.

- **Class:** Stations and crewed craft
- **Mission:** Human spaceflight
- **Triangles:** 8,664
- **File:** vostok-chutes.glb, 121 kB, glTF 2.0 binary (meshopt)
- **Look:** Physically based
- **Size:** 27 m across
- **Made:** Built from dimensions
- **Added:** 2026-10-29
- **Download:** https://raw.githubusercontent.com/Sara-Managed-Projects/space-radar/main/site/models/vostok-chutes.glb
- **Mirror:** https://git.sara-agent.org/sara-projects/space-radar/raw/branch/main/site/models/vostok-chutes.glb
- **Viewer:** https://www.spaceradar.ai/model/?id=vostok-chutes
- **Licence:** MIT (https://github.com/Sara-Managed-Projects/space-radar/blob/main/LICENSE)
- **Credit:** Vostok parachutes 3D model by Space Radar (spaceradar.ai), MIT License

Canonical: https://models.spaceradar.ai/vostok-chutes/

## How it was made

Built in code from published dimensions and photographs, with no image-to-3D generator and no one else’s mesh. 3D model: built by Space Radar from published canopy areas; compared with photographs of the capsule and the seat.

built by this project in code (tools/vostok-builder/, release 1.5.0 stage r15-c2: chutes.py); no agency or museum 3D model of this craft exists under a free licence (read 2026-10-29): NASA 3D Resources' file listing (1 583 paths, the GitHub tree of nasa/NASA-3D-Resources) has nothing of Vostok or the R-7 (its one Soyuz is the Apollo-Soyuz one); the Smithsonian's National Air and Space Museum records show physical models only (its 3D site was down); Wikimedia Commons has no 3D file of any of them; the downloadable meshes a web search found (CGTrader, MyMiniFactory, RenderHub, Unity) are sold or personal-use only. So it is built, as the quality bar says: from opened dimensions and many pictures of the flown hardware and the museum copies. No image-to-3D model was used and no published mesh.

## Dimensions

- Capsule main area: 574 m²
- Capsule braking area: 18 m²
- Capsule pullout area: 1.5 m²
- Pilot main area: 83.5 m²
- Pilot reserve area: 56 m²
- Nominal main diameter: 27 m

Source: RussianSpaceWeb, 'Botched Vostok launch tests emergency landing' (https://www.russianspaceweb.com/vostok-1k-4.html), read 2026-10-29, of the capsule of Korabl-Sputnik 4 (the PS-6415-59 system): 'a small pullout parachute with an area just 1.5 square meters' released 'a much larger 18-square-meter braking parachute' at 4 km and 180 m/s, slowing the capsule to 70 m/s, and at 2 km 'the main huge parachute with an area 574 square meters was released' (descent then 10 to 12 m/s). The cosmonaut's: Rambler, 'Парашюты для «космического десанта»' (https://news.rambler.ru/scitech/44174259-parashyuty-dlya-kosmicheskogo-desanta/), read 2026-10-28: the ejection seat 'with a main parachute of 83.5 square metres' and a reserve 'with a canopy of 56 square metres'; the seat's own drogue is drawn at 2 m^2 on the word of a search result that quoted a museum teaching document (museumday.mgpu.ru) which was NOT opened: ILLUSTRATIVE. The nominal diameters are a flat circle's (d = sqrt(4 A / pi): 27.0 m, 4.8 m, 1.4 m, 10.3 m, 8.4 m, 1.6 m). THE INFLATED SHAPE (0.66 of the nominal across, a gored oblate dome with a vent, a scalloped hem, one line to a gore, the lines 0.9 of the nominal long), the orange and white gores and the thickness of every line (made thicker than the real, so they show) are OURS and ILLUSTRATIVE: no drawing of the canopies was found. THE COSMONAUT'S CHUTES ARE A STAND-IN FOR THE SEAT'S: on 12 April 1961 the reserve opened on its own and both flew (RussianSpaceWeb, 'Landing of the Vostok spacecraft').

## References

- [Vostok ejector seat.jpg](https://commons.wikimedia.org/wiki/File:Vostok_ejector_seat.jpg), Stolbovsky (CC BY 4.0 (Commons, read 2026-10-28))