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Chassis and Wheels Tech
Foaming the chassis
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<blockquote data-quote="ichiwan2" data-source="post: 67332" data-attributes="member: 153"><p>The PU foam is just a rigid foam, it is not as solid/dense as a block of steel. There is air in the foam in closed cells. The rigidity is conferred by the expansion of the foam under sealed environment, e.g., like air in an air mattress. The PU foam is breakable, unlike steel. It does, however, add to the stiffness of the chassis</p><p></p><p>The main areas of application of PU Foam are in the door sills, B-pillar, C-pillar, A-pillar and certain cross members in the front (like having the strut-bar at the bottom) and rear. Personally, I would prefer to have a stronger passenger cell, which should protect the software of the car, i.e., me and my passengers.</p><p></p><p>Furthermore, the handling improvements reduce the likelihood of one losing control/traction, which for my humble e21, is very important.</p></blockquote><p></p>
[QUOTE="ichiwan2, post: 67332, member: 153"] The PU foam is just a rigid foam, it is not as solid/dense as a block of steel. There is air in the foam in closed cells. The rigidity is conferred by the expansion of the foam under sealed environment, e.g., like air in an air mattress. The PU foam is breakable, unlike steel. It does, however, add to the stiffness of the chassis The main areas of application of PU Foam are in the door sills, B-pillar, C-pillar, A-pillar and certain cross members in the front (like having the strut-bar at the bottom) and rear. Personally, I would prefer to have a stronger passenger cell, which should protect the software of the car, i.e., me and my passengers. Furthermore, the handling improvements reduce the likelihood of one losing control/traction, which for my humble e21, is very important. [/QUOTE]
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