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The first upright vacuum cleaner was invented in June 1908 in North Canton, Ohio, by department store janitor and occasional inventor James Murray Spangler.Spangler was an asthmatic, and suspecting the carpet sweeper he was using at work was the cause of his ailment, he created a basic suction-sweeper by mounting an electric fan motor on a carpet sweeper and then adding a soap box and a broom ...
A wind tunnel diagram which shows a fan drawing air past a model aircraft. [2] The measurements taken from models are applicable to full-size objects. The effect of streamlining is made visible in a wind tunnel. Shaping the body to make it more streamlined reduces fuel consumption.
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