File:Tetrahedron at Lyndon B Johnson National Historical Park.jpg
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Summary[edit]
| Description |
English: From the webpage: "The tetrahedron is a wind direction device used to guide aircraft into the LBJ Ranch. It is mounted on a swivel, so that it can turn, and it will point into the wind. Knowing the wind direction is important for pilots. Takeoffs and landings are always done into the wind." |
| Date | |
| Source | https://www.nps.gov/places/000/tetrahedron.htm |
| Author | NPS Photo / Jack Burton |
Licensing[edit]
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This image or media file contains material based on a work of a National Park Service employee, created as part of that person's official duties. As a work of the U.S. federal government, such work is in the public domain in the United States. See the NPS website and NPS copyright policy for more information. |  |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:07, 24 September 2023 | | 1,600 × 900 (293 KB) | 痛 (talk | contribs) | Uploaded a work by NPS Photo / Jack Burton from https://www.nps.gov/places/000/tetrahedron.htm with UploadWizard |
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