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Dirt, debris, dander and pet hair are no match for the Hoover WindTunnel XL — score over 40 percent off. ‘Blows away my Dyson’: Pet owners praise this Hoover vac that’s on sale for $69 ...
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 ...
The most common upright vacuum cleaners use a drive-belt powered by the suction motor to rotate the brush-roll. However, a more common design of dual motor upright is available. In these cleaners, the suction is provided via a large motor, while the brushroll is powered by a separate, smaller motor, which does not create any suction.
Henry Quick - A cordless stick vacuum cleaner, much different to the other drum models. It only has a 60 minute battery life. 1-litre capacity. Charles (CVC370) - Larger blue wet-and-dry vacuum with a 15-litre dry and a 9-litre wet capacity which was also available in red, green and yellow at one time. In the late 1980s, this model and some ...
High-altitude tunnels: These are designed to test the effects of shock waves against various aircraft shapes in near vacuum. In 1952 the University of California constructed the first two high-altitude wind tunnels: one for testing objects at 50 to 70 miles (80 to 113 km) above the earth and the second for tests at 80 to 200 miles (130 to 320 ...
7' x 5' tunnel 2.1 m (6 ft 11 in) by 1.5 m (4 ft 11 in) R J Mitchell Wind Tunnel 3.5 m (11 ft) by 2.4 m (7 ft 10 in) United Kingdom University of Surrey [17] Operational EnFlo Laboratory meteorological wind tunnel 3.5 m (11 ft) by 1.5 m (4 ft 11 in) by 20 m (66 ft) United Kingdom
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