File:CompressedAirLocomotiveNearTunnelEntranceInAirolo Section1 AdolpheBraun1811to1877.jpg
CompressedAirLocomotiveNearTunnelEntranceInAirolo_Section1_AdolpheBraun1811to1877.jpg (350 × 369 pixels, file size: 52 KB, MIME type: image/jpeg)
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Summary
[edit]DescriptionCompressedAirLocomotiveNearTunnelEntranceInAirolo Section1 AdolpheBraun1811to1877.jpg |
English: The image shows a pneumatic locomotive used during the construction of the Gotthard Rail Tunnel behind an archway or short tunnel of just a few meters. The original caption of the image translates to "Tunnel Entrance in Airolo", which probably indicates the approximate location of the shown arch, which is not the southern portal to the Gotthard Rail Tunnel itself.
The shown pneumatic locomotive stored energy in the form of compressed air in the large pressure container up front. The released expanding air was used to operate the motor of the locomotive. Steam driven compressors were readily available at the time of the construction (1872-1880) and for example in use to drive pneumatic drills. Most probably these compressors were also used to load the pressure containers outside the tunnel. (The first DC motors were just being developed and the AC motor was patented by Tesla only in 1888.) In contrast to steam engines the pneumatic engines did not require additional ventilation of the tunnel during its construction. Even using pneumatic technology the tunnels were poorly ventilated adding to the poor work conditions. |
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Date | or before (the date given is the date of Adolphe Braun's death) | |||||
Source | Photographische Ansichten der Gotthardbahn, Photographien v. Ad. Braun & Cie, Dornach. i / Elsass, 1875 (literally: Photographic Views of the Gotthardbahn) | |||||
Author | Adolphe Braun (1811-1877) | |||||
Permission (Reusing this file) |
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current | 08:15, 24 September 2009 | 350 × 369 (52 KB) | PasoAPaso (talk | contribs) | {{Information |Description={{en|1=The image shows a pneumatic locomotive used during the construction of the Gotthard Rail Tunnel behind an archway or short tunnel of just a few meters. The original caption of the image translates to "Tunnel Entrance in A |
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Author | Paso A PasoAPaso |
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Pixel composition | RGB |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Mac OS X 10.5.6 (9G55) |
File change date and time | 06:20, 20 September 2009 |