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Beginning of Paper
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The Bicycle: From Wood to Metal.
A bicycle is a two-wheeled, steerable machine propelled by its rider; the bicycle is said to be the most efficient means yet devised to convert human energy into propulsion. First made in the early 19th century, it developed as an important means of transportation and as the basis for a world-wide sport and industry. Bicycles are the most numerous road machines in many countr ....
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Middle of Paper
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.... rolling along between these propulsive pushes. (fig 1)
page 14 von drais 1817.
Despite the technical and visual development the bicycle has undergone in the years since, the basic concept is clearly present in Von Drais invention, and what is more, unlike so many other ideas, this one was actually built and used in practice. The essential principle was the transition from an intermittent (walking) to a continuous (rolling) movement, which greatly reduces energy c ....
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ADDITIONAL FEATURED ESSAYS
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