The rear window wiper blade on Paulette's MINI Cooper goes slower than the front windshield wipers. It also moves sporadically, not constantly. That makes sense as an engineering design feature: during ordinary operation much less water gets onto the back window. But a discovery that took me almost five years to notice: the rear wiper makes precisely one swipe for every three that the front wipers make. This relationship applies when the front wipers are running at any speed: intermittent, slow, or fast. It only breaks down when the front wipers are turned off entirely, in which case the rear wiper goes at its slowest rate. Fascinating—to somebody like me, anyway, who enjoys seeing silly patterns ...
(cf. IpodMiniCooperAccessory (2004-07-06), ...) - ^z - 2009-06-19