{"page":"\u003clink rel=\"stylesheet\" href=\"https://lessonplanet.com/assets/packs/css/resources-572d6a42.css\" /\u003e\n\u003clink rel=\"stylesheet\" href=\"https://lessonplanet.com/assets/packs/css/lp_boclips_stylesheets-f4d0de30.css\" media=\"all\" /\u003e\n\u003cdiv data-title='Great British Inventions - The Hovercraft' data-url='/boclips/videos/5d4dc3377511ce3884de0eb1' data-video-url='/boclips/videos/5d4dc3377511ce3884de0eb1' id='bo_player_modal'\u003e\n\u003cdiv class='boclips-resource-page modal-dialog panel-container'\u003e\n\u003cdiv class='react-notifications-root'\u003e\u003c/div\u003e\n\u003cdiv class='rp-header'\u003e\n\u003cdiv class='rp-type'\u003e\n\u003ci aria-hidden='true' class='fai fa-regular fa-circle-play'\u003e\u003c/i\u003e\nVideo\n\u003c/div\u003e\n\u003ch1 class='rp-title' id='video-title'\u003e\nGreat British Inventions - The Hovercraft\n\u003c/h1\u003e\n\u003cdiv class='rp-actions'\u003e\n\u003cdiv class='mr-1'\u003e\n\u003ca class=\"btn btn-success\" data-posthog-event=\"Signup: LP Signup Activity\" data-posthog-location=\"body_link_boclips\" data-remote=\"true\" href=\"/subscription/new\"\u003e\u003cspan\u003e\u003cspan\u003eGet Free Access\u003c/span\u003e\u003cspan class=\"\"\u003e for 10 Days\u003c/span\u003e\u003cspan\u003e!\u003c/span\u003e\u003c/span\u003e\u003c/a\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv class='rp-body'\u003e\n\u003cdiv class='rp-info'\u003e\n\u003cdiv aria-label='Hide resource details' class='rp-hide-info' role='button' tabindex='0'\u003e\u0026times;\u003c/div\u003e\n\u003ci aria-label='Expand resource details' class='rp-expand-info fai fa-solid fa-up-right-and-down-left-from-center' role='button' tabindex='0'\u003e\u003c/i\u003e\n\u003ci aria-label='Compress resource details' class='rp-compress-info fai fa-solid fa-down-left-and-up-right-to-center' role='button' tabindex='0'\u003e\u003c/i\u003e\n\u003cdiv class='rp-rating'\u003e\n\u003cspan class='resource-pool'\u003e\n\u003cspan class='pool-label'\u003ePublisher:\u003c/span\u003e\n\u003cspan class='pool-name'\u003e\n\u003cspan class='text'\u003e\u003ca data-publisher-id=\"30356011\" href=\"/search?publisher_ids%5B%5D=30356011\"\u003eCurated Video\u003c/a\u003e\u003c/span\u003e\n\u003c/span\u003e\n\u003c/span\u003e\n\u003c/div\u003e\n\u003cdiv class='rp-description'\u003e\n\u003cspan class='short-description'\u003eSubscribe to Naked Science - Every other Wednesday we present a new video, so join us to see the truth laid bare... Boats can’t reach high speeds because of the friction between the hull and the water. In 1877 Sir John Isaac Thornycroft,...\u003c/span\u003e\n\u003cspan class='full-description hide'\u003eSubscribe to Naked \u003ca href='http://goo.gl/wpc2Q1' target='_blank' rel='nofollow'\u003eScience -\u003c/a\u003e Every other Wednesday we present a new video, so join us to see the truth laid bare... Boats can’t reach high speeds because of the friction between the hull and the water. In 1877 Sir John Isaac Thornycroft, a brilliant British boat designer suggested that trapping air under a boat might reduce the friction problem. He tested his idea with a scale model of a flat bottomed boat with a recess underneath. Air trapped in the recess lifted the boat almost out of the water increasing its speed. Later he built a much more complex model using a clockwork mechanism connected to bellows, the bellows pumped air underneath the boat, as it passed through the water the air acted as a lubricant reducing the boat’s friction and once again increasing its speed. Sadly for Thornycroft his boat needed better engine technology than existed at the time. The patents were never exploited. Over half a century later another inventor took up the challenge and built the first full sized hovercraft. That man was Sir Christopher Sydney Cockerell. His dedicated belief in the air cushion principle earned him a place in the history books, as the inventor of the hovercraft. When he unveiled the first prototype of his extraordinary machine the press were amazed, the headlines called it the “Flying Saucer”. But they did not possibly believe it could work over water. So the scientists took it out onto the bay for its first ever flight over the sea. Cockerell was a well-respected engineer, he already had many patents to his name. He knew the hovercraft would work because of his early experiments, using an air blower, two tin cans, one inside the other, and a set of scales. Clip from the documentary “Extreme Machines - Hovercraft”. 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