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Ludwig Prandtl with the water test tunnel in Hanover



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Ludwig Prandtl with the water test tunnel in Hanover
Ludwig Prandtl (1875-1953) with the water test tunnel in Hanover in 1904. The water tank was 1.5 metres long and a hand wheel drove the circulation. Guide vanes and screens ensured adequately streamlined flow.
Credit: DLR-Archiv Göttingen.