Today in History 12/15/20 leadertelegram.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from leadertelegram.com Daily Mail and Mail on Sunday newspapers.
This day in history, Dec. 15, 2020 news-gazette.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from news-gazette.com Daily Mail and Mail on Sunday newspapers.
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Dec. 12, 1955: First prototype of hovercraft patented by British engineer Christoper Cockerell. A hovercraft, also known as an air-cushion vehicle or ACV, is an amphibious craft capable of travelling over land, water, mud, ice, and other surfaces. Hovercraft use blowers to produce a large volume of air below the hull, or air cushion, that is slightly above atmospheric pressure. The pressure difference between the higher pressure air below the hull and lower pressure ambient air above it produces lift, which causes the hull to float above the running surface. For stability reasons, the air is typically blown through slots or holes around the outside of a disk- or oval-shaped platform, giving most hovercraft a characteristic rounded-rectangle shape. Typically this cushion is contained within a flexible “skirt”, which allows the vehicle to travel over small obstructions without damage.
bombers. gen henry h. arnold commanding general of the u.s. army air forces was dismayed the u.s. military couldn t afford to keep losing aircraft at that rate. newcomers to bombing warfare the americans had botched to and from c. . but u.s. bombers would prove their destructive potential in other campaigns in other places . in july nine hundred forty three the war entered a new phase the landing of allied troops in sicily launched a ground offensive and ground troops expected support from bombers. for the u.s. air force this was a second chance italy was less well defended than germany. bought