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- Mar 1, 2010
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This was a ford prefect and the wipers were driven off vacuum from the inlet manifold. They therefore only worked when you deaccelerated..........an extra safety feature in the rain.
My Dad's Mk II Ford Consul also had vacuum wipers. They would shudder to a halt when overtaking something in the rain - then flap like mad things on the over-run, I think he once lost a wiper arm

Less traffic about in those days, fortunately.
Bob.