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Dan Henry Arrows
Dan Henry (1913-2012) is the inventor of directional pavement markings commonly used to guide participants along the route of organized bicycling events. The markers themselves are usually called Dan Henry Arrows. Originally, the markings consisted of a circle with a vertical line from the edge of the circle pointing in the direction of travel (straight ahead, left turn, right turn). Other common markings are a circle X to denote wrong way, and a circled horizontal line to denote caution. Variations on the circle pattern developed to differentiate between different rides as more and more rides began to use the same roads. Variations include color, triangles, squares, letters, etc. Other cycling related inventions by Henry include front and rear suspension systems and the 'sling' saddle. Henry worked as a commercial pilot, starting in the 1920s, later on DC-2 and DC-3 aircraft and the Boeing 707 jetliner . Honors The League of American Wheelmen awarded Henry its Paul Dudley Whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bicycling
Cycling, also known as bicycling or biking, is the activity of riding a bicycle or other types of bicycle pedal, pedal-driven human-powered vehicles such as balance bikes, unicycles, tricycles, and quadricycles. Cycling is practised around the world for purposes including transport, recreation, exercise, and competitive sport. History Cycling became popularized in Europe and North America in the latter part and especially the last decade of the 19th century. Today, over 50 percent of the human population knows how to ride a bike. War The bicycle has been used as a method of reconnaissance as well as transporting soldiers and supplies to combat zones. In this it has taken over many of the functions of horses in warfare. In the Second Boer War, both sides used bicycles for scouting. In World War I, France, Germany, Australia and New Zealand used bicycles to move troops. In its 1937 invasion of China, Japan employed some 50,000 bicycle troops, and similar forces were instrume ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
