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The ''Pioneer Zephyr'' is a diesel-powered railroad train formed of railroad cars permanently articulated together with Jacobs bogies, built by the Budd Company in 1934 for the Chicago, Burlington and Quincy Railroad (CB&Q), commonly known as the Burlington. The train featured extensive use of stainless steel, was originally named the ''Zephyr'', and was meant as a promotional tool to advertise passenger rail service in the United States. The construction included innovations such as shotwelding (a specialized type of spot welding) to join the stainless steel, and articulation to reduce its weight. On May 26, 1934, it set a speed record for travel between Denver, Colorado, and Chicago, Illinois, when it made a 1,015-mile (1,633 km) non-stop "Dawn-to-Dusk" dash in 13 hours 5 minutes at an average speed of 77 mph (124 km/h). For one section of the run it reached a speed of 112.5 mph (181 km/h), just short of the then US land speed record of 115 mph (185 km/h). The historic dash inspired a 1934 film and the train's nickname, "The Silver Streak".〔 (Web archive link )〕〔Johnston and Welsh, p 15.〕〔Zimmerman, p. 16.〕 The train entered the regular revenue service on November 11, 1934, between Kansas City, Missouri; Omaha, Nebraska; and Lincoln, Nebraska. It operated this and other routes until its retirement in 1960, when it was donated to Chicago's Museum of Science and Industry, where it remains on public display. The train is generally regarded as the first successful streamliner on American railroads.〔〔Zimmerman, p. 26.〕 ==Concept and construction== In the early 1930s, the US was in the depths of the Great Depression. Without the money to purchase new goods, freight trains were not hauling as much as they had in the previous decade. People who could not buy goods also could not afford to travel to the extent that they had before, so passenger revenues were also down. Railroads needed a way to re-energize the traveling public and offer a bit of hope for the days to come. One of the railroad presidents who faced this challenge was Ralph Budd, formerly of the Great Northern Railway and now president of the Chicago, Burlington and Quincy Railroad (Burlington), who needed a new train to get the public interested in traveling again. Naming the train was a task that was very seriously taken by Budd. He wanted a name that started with the letter ''Z'' because this train was intended to be the "last word" in passenger service; Budd and his coworkers looked up the last words in their dictionaries, but neither ''zymurgy'' nor ''zyzzle'' conveyed the meanings that Budd was looking for. The name of the new train came from ''The Canterbury Tales'', which Budd had been reading. The story begins with pilgrims setting out on a journey, inspired by the budding springtime and by Zephyrus, the gentle and nurturing west wind. Budd thought that would be an excellent name for a sleek new traveling machine—''Zephyr''.〔〔Kisor, p. 16〕〔Zimmerman, p. 29.〕 In 1932 Ralph Budd met Edward G. Budd (no relation), an automotive steel pioneer who was founder and president of the Budd Company. Edward Budd was demonstrating his new carbody construction in a prototype rail motorcar built of stainless steel. Stainless steel provided many benefits over traditional wood and hardened steel for railroad carbodies; it was a lighter and stronger material, and its natural silver appearance and resistance to corrosion meant that it would not have to be painted to protect it from the weather. Since the carbody was much lighter than similar cars, it would be able to carry a higher revenue load for the same cost.〔 The problem with building stainless steel cars was that nobody could find an adequate way to hold the body together. On August 20, 1932, Earl J. Ragsdale, an engineer at the Budd Company, filed a patent application for a "Method and product of electric welding"; on January 16, 1934, the United States Patent and Trademark Office (USPTO) granted US patent 1,944,106 to the Budd Company. Shotwelding, as Ragsdale termed his method, involved automatic control of the timing of individual spot welds. In spot welding, the two pieces of metal that are to be joined are pressed together with an electrode on each side of the joint. A very high electric current is passed through the joint and fuses the two pieces of metal together.〔Zimmerman, p. 19.〕 If a manual spot weld, which was, then, difficult to time, is held too long, heat will spread from the weld at a middling temperature that weakens the stainless steel unacceptably; Ragsdale's precisely-timed welds solved the problem.〔"Pioneer without Profit" (profile of Budd), ''Fortune'' magazine, February 1937, page 130.〕 Another factor in making the ''Zephyr'' lighter than conventional trains was that the individual carbodies in the train share their trucks with adjacent cars.〔Johnston and Welsh, p. 20.〕 In this design by Budd engineer Walter B. Dean, the train was three articulated compartments. On conventional passenger cars, each carbody rode upon a pair of trucks (wheel-axle assembly), with one truck at each end. The articulation not only reduced the number of trucks under the train, but it also dispensed with the need for couplers between each of the carbodies, further reducing the train's weight.〔Zimmerman, p. 25.〕 It did, however, mean that train lengths could not be easily changed by switching out cars. The exterior design of the train was left to aeronautical engineer Albert Gardner Dean (Walter Dean's younger brother) who designed the sloping nose shape, with architects Paul Philippe Cret and John Harbeson, devising a way to strengthen and beautify the sides with the train's horizontal fluting.〔Johnston and Welsh, p. 16.〕〔Zimmerman, p. 24.〕 On April 15, 1936, Colonel Ragsdale, Walter Dean and Albert Dean, filed patent applications for a "Rail Car Front End Construction". On September 23, 1941 the USPTO granted US patents 2,256,493 and 2,256,494 to the Budd Company. The first ''Zephyr'' (9900) was completed by the Budd Company on April 9, 1934, powered by an eight-cylinder, 600-horsepower (447 kW), 8-201-A model Winton engine. Like the diesel-electric locomotives that soon displaced the steam locomotive on American railroads, this engine powered an electrical generator; the electricity it generated was then fed to electric traction motors connected to the axles in the train's front truck.〔〔 The train's engineer sat in a small compartment in the nose of the train, directly in front of the prime mover. Behind the engine in the first carbody was a long railway post office section. The second carbody consisted of a small baggage section and a short buffet and 20-passenger coach section. The third and final carbody in the train, as originally built, was configured as half coach (40-passenger seats) and half observation car (12 passenger seats). As built, the train had 72 seats and could carry 50,000 pounds (22.7 tonnes) of baggage and express freight. This train's official christening occurred on April 18, 1934, at the Pennsylvania Railroad's Broad Street Station in Philadelphia, Pennsylvania.〔Zimmerman, p. 32.〕 The Budd Company used the experience learned in building the ''Zephyr'' to build similar trains (such as the ''Flying Yankee'') for other railroads, as well as a number of other ''Zephyr''s for the Burlington. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Pioneer Zephyr」の詳細全文を読む スポンサード リンク
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