在F1赛车上，到底什么是DRS系统？
在F1赛车上，到底什么是DRS系统？
对于F1赛车来说，DRS是一套在超车时能够提供额外动力的辅助工具。其英文全称为Drag Reduction System，即可调式尾翼，旨在降低尾部下压力以减小轮胎摩擦等阻力而提升尾速，从而在超越前车时提供更多动能。
F1在经历了一番变革之后，人们逐渐发现超车的行为越来越难以实现，使得比赛越来越无聊。人们可能会看到一场场跑火车的比赛，因此，这一现象也让FIA主动求变，找到了DRS这样一套辅助超车系统。
F1的尾翼形状从前到后大致上是一个先下探后往上拉升的勺形，而且下表面的弧度要比上表面的弧度大，从而在尾翼上下表面产生压力差而获得“气动负升力”，即下压力。此外方程式赛车尾翼的后半部是与水平成70-80度角的翼片，使得气流沿着尾翼的形状高速流动而向上升，这也就是“上洗效应”。
“上洗效应”就是给空气一个向上的力使其上升，赛车尾翼则获得空气对其的向下的反作用力。因此方程式赛车尾翼产生的下压力来自于尾翼前半部分上下表面产生的压力差以及尾翼后半部分上洗效应产生的反作用力。而放平尾翼，为的是在高速状态下，减少上洗效应而降低下压力。在天气和规则等允许的情况下，开启DRS可以带来约10-20KM/H（公里每小时）的车速提升。
此套系统于2011年FIA进行引进，在后车追近前车一秒以内的情况下的DRS区内方可使用。当然，在排位赛和练习赛的每圈，车手都可以在DRS区内使用这套系统，来达到追求最高速度的效果。
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