Du Yu (Tu Yu)

b. 222 China
d. 284 China
Chinese general and engineer.
Du Yu was one of the generals who reduced the San Guo state of Wu for the Chin in 280. He is credited with the diffusion of the water-powered trip hammer and the multiple-geared watermill for the grinding of cereals. A battery of trip hammers was developed, operated by several shafts working off one large water-wheel. He was responsible for the construction of the Heyang pontoon bridges over the Yellow River north-east of Leyang in 274 and also devised new designs for water-powered blowing engines, against the advice of the imperial advisors but with the emperor's encouragement.
Further Reading
Joseph Needham, Science and Civilisation in China, Cambridge: Cambridge University Press, 1959–1965, Vols III, p. 601; IV. 1, p. 35, IV. 2, pp. 30, 86, 195, 393, 394, 396; IV. 3, pp. 160–1.

Biographical history of technology. - Taylor & Francis e-Librar. . 2005.

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