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|assembly = Kopřivnice, Moravia, Czechoslovakia |predecessor=Tatra V570 |successor=Tatra 87 |image=Tatra T 77a.jpg |class=4-door sedan Executive luxury vehicle |platform= |transmission=4-speed manual〔 |layout=RR layout |body_style=limousine (Finned Fastback) |engine= |wheelbase= 〔 |length= |width= |height= |weight= |designer= }} The Czechoslovakian Tatra 77 (T77) is the first serial-produced truly aerodynamically designed automobile. It was developed by Hans Ledwinka and Paul Jaray, the Zeppelin aerodynamic engineer. Launched in 1934, the Tatra 77 is a coach-built automobile constructed on a central tube-steel chassis and is powered by a rear-mounted 3.4-liter air-cooled V8 engine. It possessed advanced engineering applications such as overhead valves, hemispherical combustion chambers, dry sump, fully independent suspension, rear swing axles and extensive use of lightweight magnesium-alloy for the engine, transmission, suspension and body. The average drag coefficient of a 1:5 model of Tatra 77 was recorded as 0.2455. The later model T77a has a top speed of over due to its advanced aerodynamics design which delivers an exceptionally low drag coefficient of 0.212,〔name="europeancarweb.com">〕〔(【引用サイトリンク】title=Tatra 77 aerodynamic car (czech) )〕〔Optimization and computational fluid dynamics, Gàbor Janiga, Springer, 2008, page 196〕〔Winning the oil endgame: innovation for profits, jobs and security, Amory B. Lovins, Rocky Mountain Institute, 2004, page 53〕〔(【引用サイトリンク】title=Conceptcarz.com )〕 although some sources claim that this is the coefficient of a 1:5 scale model, not of the car itself.〔Ivan Margolius, 'Model Behaviour', ''Octane'', February 2012, pp. 38-9〕〔http://www.tatraplan.co.uk〕 ==History== The Tatra Company began manufacturing cars in 1897 in Kopřivnice, Moravia, today's Czech republic, making it the third oldest still existing automobile manufacturer in the world. Under the direction of Hans Ledwinka, the company employed many genius minds of automotive history, including Erich Übelacker and consultant Paul Jaray, who all designed the Tatra 77.〔Ivan Margolius and John G. Henry, ''Tatra - The Legacy of Hans Ledwinka'', SAF Publishing, Harrow 1990.〕 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「Tatra 77」の詳細全文を読む スポンサード リンク
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