{"id":11383210,"date":"2012-10-15T00:00:00","date_gmt":"2012-10-14T22:00:00","guid":{"rendered":"https:\/\/alertdiver.eu\/non-classifiee\/une-balade-a-velo-sous-leau\/"},"modified":"2012-10-15T00:00:00","modified_gmt":"2012-10-14T22:00:00","slug":"une-balade-a-velo-sous-leau","status":"publish","type":"post","link":"https:\/\/alertdiver.eu\/fr_FR\/articles\/une-balade-a-velo-sous-leau\/","title":{"rendered":"Une balade \u00e0 v\u00e9lo sous leau"},"content":{"rendered":"

Prochainement, l’exploration des fonds marins sera plus facile qu’une balade \u00e0 v\u00e9lo \u00e0 l’air libre : des chercheurs de Saint-P\u00e9tersbourg ont invent\u00e9 le premier v\u00e9lo sousmarin, fonctionnant uniquement avec des p\u00e9dales.
<\/strong>
Pour obtenir une vitesse de 2 \u00e0 3 noeuds (4 \u00e0 6 km\/h), les embarcations de plaisance modernes se d\u00e9pla\u00e7ant \u00e0 l’aide de moteurs traditionnels \u00e0 h\u00e9lices qui requi\u00e8rent de grandes batteries on\u00e9reuses (pas moins de 100 000 dollars US). Vladimir Taradonov, directeur du projet Blue Space, nous a fait part des nombreux essais et \u00e9checs qu’il a fallu traverser pour cr\u00e9er le premier v\u00e9lo sous marin. En effet, m\u00eame la force physique de deux personnes n’\u00e9tait pas suffisante pour mettre l’engin en marche. « Une personne se d\u00e9pla\u00e7ant \u00e0 v\u00e9lo dans les bois ou sur la route consomme environ 300 \u00e0 400 Watts; deux personnes consomment 600 \u00e0 800 Watts. Cette force est totalement insuffisante pour se d\u00e9placer sous l’eau, o\u00f9 la densit\u00e9 est 1 000 fois sup\u00e9rieure \u00e0 celle de l’air».<\/p>\n

Les inventeurs russes ont alors opt\u00e9 pour des moteurs \u00e0 r\u00e9action. « Avec les moteurs \u00e0 rotor, l’eau est aspir\u00e9e \u00e0 travers des fentes au niveau de la proue, puis expuls\u00e9e le long de la coque. Cela g\u00e9n\u00e8re l’effet Coand\u0103<\/a>, selon lequel il se produit une diminution de la pression \u00e0 l’avant », nous a expliqu\u00e9 V.Taradonov. « L’engin se d\u00e9place alors vers la zone de plus faible pression, c’est-\u00e0-dire vers l’avant, comme s’il \u00e9tait auto-propuls\u00e9.» Apr\u00e8s plusieurs ann\u00e9es de travail sur ce projet, une th\u00e9orie a pu \u00eatre formul\u00e9e sur le mouvement des engins sous-marins, ouvrant la porte \u00e0 de nombreuses exp\u00e9riences.<\/p>\n

Les v\u00e9los sous-marins auront un co\u00fbt avoisinant celui d’une voiture de classe moyenne. Le site Web du projet Blue Space a d\u00e9j\u00e0 re\u00e7u des messages des quatre coins du monde, y compris des offres d’achat du projet pour d\u00e9marrer la production \u00e0 l’\u00e9tranger.<\/p>\n

« En ce moment, nous disposons d’un prototype finalis\u00e9 \u00e0 80 %, qui est en cours de construction dans le chantier naval d’Admiraltejskij en collaboration avec notre universit\u00e9 », a ajout\u00e9 V. Taradonov. « Voici ses dimensions : 3,5 m\u00e8tres de long pour 2 m\u00e8tres de large et 1,2 m\u00e8tre de haut, comme la cabine d’une automobile. Le mod\u00e8le de base a \u00e9t\u00e9 pens\u00e9 pour deux personnes, mais des variantes pourront accueillir jusqu’\u00e0 huit personnes.»<\/p>\n

Sources
<\/strong>Published article – Moscow Time
The Blue Space Project<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Prochainement, l’exploration des fonds marins sera plus facile qu’une balade \u00e0 v\u00e9lo \u00e0 l’air libre : des chercheurs de Saint-P\u00e9tersbourg ont invent\u00e9 le premier v\u00e9lo…<\/p>\n","protected":false},"author":1,"featured_media":11374455,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[386],"tags":[],"authors":[855],"class_list":["post-11383210","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles","authors-dan-europe-staff-fr_fr"],"acf":[],"yoast_head":"\nUne balade \u00e0 v\u00e9lo sous leau - Alert Diver<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/alertdiver.eu\/fr_FR\/articles\/une-balade-a-velo-sous-leau\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Une balade \u00e0 v\u00e9lo sous leau - 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