How Do They Do It? (UK)

Propellers, Hybrid Magnet, Crash Response System (5x14)

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Robert Llewellyn finds out how a company in the Netherlands manufactures some of the world's largest propellers. He learns about the maintenance of the two-storey hybrid magnet at Florida State University, which weighs more than 31 tons, and explores a new automatic crash-response system developed for use in cars