A car tested under a rain simulator

An individual in the car adjusts the wiper speed manually depending on the windscreen visibility. The visibility is related to the intensity of the rain. This is set by the rain simulator, a machine that uses a sprinkler irrigation system with adjustable nozzles to simulate light to heavy rain.

Credit: www.ikg.uni-hannover.de, Daniel Fitzner

• Using moving cars to measure rainfall (28 November 2013)

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