File:Dr Wôlfert's dirigible balloon, Airships past n present, InternetArchive.jpg

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Français : Dr Wölfert's dirigible balloon, tiré de : Airships past and present, InternetArchive.
Ce dirigeable doit être le "Deutschland".
Voici le texte d'Hildebrandt à propos de ce dirigeable : "In 1879 Baumgarten and Wolfert built a balloon in Germany that was fitted with a Daimler benzine motor, and the first ascent was made with it at Leipsic in 1880. It had a propeller for raising it in the air, and was fitted at the sides with things of the nature of wings, which were for the purpose of producing horizontal motion (Fig. 29). Baumgarten almost came to grief during the first trial. The airship had three cars, and the result of carrying a passenger in one of the outer cars was that the load was unevenly distributed. In consequence the whole thing tilted over with the longer axis in a vertical position, and came with a crash to the ground. The occupants luckily escaped without injury. Baumgarten subsequently died, and Wolfert proceeded with the work alone. Successful experiments were said to have been made, and finally it was arranged to make an ascent on the Tempelhofer Feld, near Berlin, on June 12th, 1897. The balloon rose to a height of 600 feet and travelled with the wind. Suddenly a flame was seen to dart from the motor towards the main body of the balloon, a slight report was heard, and the whole thing fell to the ground, where it was entirely destroyed by the names before it was possible to rescue Wolfert and his companion. The disaster was caused by the fact that no suitable precautions were taken in connection with the benzine vapour, which formed an explosive mixture with the air, and was accidentally fired. One would have thought an accident of this kind was sufficient to put inventors on their guard, and it is therefore strange to find that Severo's death [on the airship Pax, npWP] was caused a few years later by precisely the same defect in his arrangements."

Et voici la narration par Lecornu du deuxième vol du Deutschland[1] :

Wœlfert et son aide, le mécanicien Robert Knabe, montèrent dans la nacelle et mirent le moteur eu marche: il se produisit aussitôt des jets de flamme inquiétants sur le côté de la machine. Un journaliste présent en fit la remarque au Dr Wœlfert. « Je pars quoi qu'il arrive», répondit celui-ci qui semblait plein de confiance. Knabe, de son côté, ne paraissait nullement inquiet : «Donne-moi ta canne, lui dit l’un de ses amis ; tu n'en as pas besoin, et si tu ne reviens pas, j'aurai un souvenir de toi.—La voici, répondit Knabe en riant ; mais garde-la bien, tu me reverras bientôt. » Aussitôt libre, le ballon monta rapidement, mais le gouvernail se brisa et l'on vit le ballon tourner plusieurs fois sur lui-même. Il était alors à peu près à 1000 mètres de haut, lorsque tout à coup une violente détonation se fit entendre : une colonne de flammes s'éleva et l'on vit le ballon tout en feu s'abîmer à terre. On entendit des appels désespérés partant de la nacelle, et en quelques instants le ballon, la nacelle et les deux infortunés aéronautes vinrent se briser sur un chantier de bois auquel le ballon incendié mit le feu. Le Dr Wœlfert était horriblement mutilé. Le malheureux Knabe avait le crâne ouvert et une jambe brisée. La nacelle était arrivée à terre avec une telle violence que l'on retrouva le moteur enfoui à près d'un mètre dans le sol !
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Airships past and present, ... by A. Hildebrandt, Captain and Instructor in the Prussian Balloon Corps, 1908, Internet Archive

[1]
Author Unknown authorUnknown author

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Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Dr_W%C3%B4lfert%27s_dirigible_balloon,_Airships_past_n_present,_InternetArchive.jpg
  1. Joseph Louis LECORNU. LA NAVIGATION AÉRIENNE : HISTOIRE DOCUMENTAIRE ET ANECDOTIQUE, 1903, [2]

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