File:1911.03.11-Lorenzan-Screw-pictures.png
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Size of this preview: 800 × 329 pixels. Other resolutions: 320 × 132 pixels | 640 × 263 pixels | 1,477 × 608 pixels.
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Summary
Helicopter screw prototype designed by Christian Lorenzen.
Flight, 1911, The Problem of the Helicopter (source: Internet Archive).
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 05:18, 23 October 2020 | | 1,477 × 608 (604 KB) | LTA (talk | contribs) | Helicopter screw prototype designed by Christian Lorenzen. Flight, 1911, The Problem of the Helicopter (source: [https://archive.org/details/Flight_International_Magazine_1911-03-11-pdf/page/n15/mode/2up Internet Archive]). |
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