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| bullet and bomb-proof tire http://mopar-owners-club.com/forum/viewtopic.php?f=6&t=31135 |
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| Auteur: | Beep Beep [ Mer Nov 19, 2008 7:26 pm ] |
| Sujet du message: | bullet and bomb-proof tire |
Peut être le pneu du futur? The University of Wisconsin-Madison and a Wausau, Wis., company have come up with a 37-inch, bullet and bomb-proof Humvee tire based on a polymeric web so cool looking there's no need for hub caps. Resilient Technologies and Wisconsin-Madison's Polymer Engineering Center are creating a "non-pneumatic tire" (no air required) that will support the weight of add-on armor, survive an IED attack, and still make a 50 mph getaway. It's basically a round honeycomb wrapped with a thick, black tread. The military wants an alternative to the current Humvee "run flat" tires, which despite the name, still need a minimal amount of air pressure to roll and can leave troops stranded after being shot or blown out. "You see reports all the time of troops who were injured by an IED or their convoys got stranded because their tires were shot out," said Resilient's General Manager Mike Veih. "There's all sorts of armor on the vehicle, but if you're running in the theater and get your tire shot out, what have you got? You've got a bunch of armor in the middle of a field." In developing the design, the Wisconsin team studied other airless tires, like the Michelin "Tweel," but in the end settled on lessons learned from nature. The patent-pending design mimics the precise, six-sided cell pattern found in a honeycomb and best duplicates the "ride feel" of pneumatic tires, according to the developers. "The goal was to reduce the variation in the stiffness of the tire, to make it transmit loads uniformly and become more homogenous," said mechanical engineering professor Tim Osswald. "And the best design, as nature gives it to us, is really the honeycomb." This particular geometry also does a great job of reducing noise and heat levels while rolling-two common problems with past models. source:http://news.cnet.com/8300-13639_3-42.html?tag=rb_content;overviewHead Costs per tire are expected to be the same or less than current units. Delivery is anticipated for 2011. [img]http://mopar-owners-club.com/images/fbfiles/images0/Humvee_tire_270x269.jpg[/img] |
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| Auteur: | Popeye [ Mer Nov 19, 2008 7:56 pm ] |
| Sujet du message: | Re:bullet and bomb-proof tire |
étudier depuis des années chez michelin, mais invendable au particulier pour le moment. avantage: Le top de la tenue de route, increvable, réglable. défauts: laid, s'use comme les autres trop chère temps qu'il n'a pas de déboucher au particulier. Moin dieu que c'est laid :S |
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| Auteur: | chally7t [ Mer Nov 19, 2008 8:01 pm ] |
| Sujet du message: | Re:bullet and bomb-proof tire |
Popeye écrit: Citation: Mon dieu que c'est laid :S
Pourquoi ils mettent pas le procédé dans un pneu normal ? |
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| Auteur: | Popeye [ Mer Nov 19, 2008 8:26 pm ] |
| Sujet du message: | Re:bullet and bomb-proof tire |
Comme tu peux le voir sur l'image, le pneu à une section carrée. Le but est de garantir une adhérence par une surface maximum en permanence. Les alvéoles elle sert à prendre en compte l'angle que peut prendre la voiture dans les virages. Sur un pneu normal, le pneu est obligé de se déformer en fonction de l'angle de la voiture et du coup, limitent parfois l'adhérence par sa déformation. D'une part ça doublerait les coûts de fabrication si l'on mettait un peu autour. 2 sa supprimerait tout l'avantage du système. |
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| Auteur: | chally7t [ Mer Nov 19, 2008 10:31 pm ] |
| Sujet du message: | Re:bullet and bomb-proof tire |
Mmmm.....ok, merci :) |
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| Auteur: | dodgefred [ Jeu Nov 20, 2008 11:16 am ] |
| Sujet du message: | Re:bullet and bomb-proof tire |
reste à savoir comment on ajuste la pression :woohoo: :woohoo: quand il faut degonfler pour une meilleure traction ou adherence ROCKCRAWLING PAR EXEMPLEou dans la bouillasse il m'est arrivé de rouler avec une pression de 500g pour un maximum de traction...:woohoo: :woohoo: |
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