File:Diego-ufano-1628-artillery.jpg
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| Description |
English: "Comment appliquer le quadrant". "Wie der quadrant anzuschlagen". "Tractat 3 Cap 13 fig 2". "Poinct du niveau". "Punct der Wagen". Gunner's square for orientation of a cannon. Trajectories A-O for different exit angles of the cannonball with their impact points and distances. Carpentry hook with plumb bob. Furthest distance is achieved for a cannon angle to ground of approximately 38 degrees. This angle is smaller than 45 degrees due to air drag. |
| Date | circa 1628 |
| Source | found in internet. "Tractat 3 Cap 13 fig 2" (Also in:) Robert Norton: The Gunner Shewing the Whole Practise of Artillery, Etc, London 1628. |
| Author | Unknown author ?old painting by Diego Ufano, 1628? Engraving |
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I, the copyright holder of this work, hereby publish it under the following license:
 
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This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. |
| The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 23:14, 3 January 2012 | | 3,425 × 2,666 (1.4 MB) | Dantor (talk | contribs) | {{Information |Description ={{en|1=Gunner's square for orientation of a cannon. Highest distance is achieved for cannon angle to ground of approximately 38deg. This angle is smaller than 45deg due to air drag.}} |Source =found in internet. |Aut |
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