Delta II second stage
Shape built from published dimensions and pictures; details simplified.
Turn it in 3D
Open the 3D viewer (www.spaceradar.ai).
The viewer loads when you ask: about 700 kB the first time (three.js and the model), much less after.
About this model
Delta II second stage is one of the 203 3D models Space Radar made itself: a rocket stage, built in code from published dimensions and photographs, with no image-to-3D generator and no one else’s mesh.
Shape built from published dimensions and pictures; details simplified. It has 8,840 triangles in a 64 kB glTF file, and is 6.0 m across at full scale.
It is part of the map’s library; no object on the live map is drawn with it today.
Dimensions and their sources
| Measure | Value |
|---|---|
| Length | 6 m |
| Diameter | 2.44 m |
Wikipedia, 'Delta II' (en.wikipedia.org/wiki/Delta_II), read 2026-10-26, which cites the Boeing Delta II Payload Planner's Guide: second stage Delta K 'length 6 m', 'diameter 2.44 m', 950 kg empty, one AJ10-118K of 43.6 kN; stainless-steel tanks in a light aluminium structure, helium pressurisation, nitrogen thrusters. OURS: the bell's size (read off KSC-02PD-2059 against the 2.44 m barrel), the bottles' sizes and places, the guidance bay's fittings (read 2026-10-26)
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 dimensions; compared with NASA's photographs of the Delta-K stage (public domain).
The full record
built by this project in code (tools/stage-builder/, release 1.4.0 stage r14-m1: stagelib.py and one function a stage in stages.py); no image-to-3D model was used and no published mesh: none of NASA 3D Resources' 1 583 paths is this stage and a web search found no agency or operator model of it (read 2026-10-26)
Where the map uses it. catalogue names DELTA 2 R/B and DELTA 2 R/B(1) (klass rocket): the Delta II second stage, 'Delta K', 34 in orbit; public #1164. DELTA 2 R/B(2) is the Star-48 third stage of a three-stage flight and keeps the generic stage
Licence note. The shape is this project's, under this repository's licence, built from published numbers (facts). Every picture it was compared with is listed under references; each was only looked at, none was traced, copied or projected, and the share-alike ones (CC BY-SA) are credited all the same.
References 4
What the shape was compared with. None of these pictures is in the file.
- Delta-K second stage for Delta 294 mission (KSC-02PD-2059)NASAPublic domain (NASA; Commons LicenseShortName, read 2026-10-26)
- Delta-K second stage for Delta 294 mission (KSC-02PD-2058)NASAPublic domain (NASA; Commons LicenseShortName, read 2026-10-26)
- Delta II second stage (KSC-07PD-0126)NASA/George SheltonPublic domain (NASA; Commons LicenseShortName, read 2026-10-26)
- Delta II 7920 second stage (KSC-03PD-2886)NASAPublic domain (NASA; Commons LicenseShortName, read 2026-10-26)
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Use it
The model is under the MIT licence: use it, change it and share it, in any project, also a paid one. Keep the credit:
Delta II second stage 3D model by Space Radar (spaceradar.ai), MIT LicenseAny glTF 2.0 loader that reads meshopt compression (EXT_meshopt_compression) opens the file: three.js with its MeshoptDecoder, Babylon.js, model-viewer. Tools such as glTF-Transform can write an uncompressed copy.
Or embed the viewer in your page:
<iframe src="https://www.spaceradar.ai/model/?id=delta2-stage" title="Delta II second stage, 3D model by Space Radar" width="600" height="450" loading="lazy" style="border:0;max-width:100%"></iframe>Related models
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