{"id":191200,"date":"2009-09-13T06:59:00","date_gmt":"2009-09-13T11:59:00","guid":{"rendered":"https:\/\/www.panix.com\/~msaroff\/40years\/2009\/09\/13\/neat-tech-nutating-engine\/"},"modified":"2009-09-13T06:59:00","modified_gmt":"2009-09-13T11:59:00","slug":"neat-tech-nutating-engine","status":"publish","type":"post","link":"https:\/\/www.panix.com\/~msaroff\/40years\/2009\/09\/13\/neat-tech-nutating-engine\/","title":{"rendered":"Neat Tech: Nutating Engine"},"content":{"rendered":"<p><a href=\"http:\/\/img7.imageshack.us\/img7\/3373\/armymil2008052107475838.jpg\"><img decoding=\"async\" src=\"http:\/\/img7.imageshack.us\/img7\/3373\/armymil2008052107475838.jpg\" style=\"margin: 0px 0px 10px 10px; float: right; cursor: pointer;\" width=\"400\" \/><\/a><a href=\"http:\/\/img193.imageshack.us\/img193\/7682\/nutatingenginesealing36.jpg\"><img decoding=\"async\" src=\"http:\/\/img193.imageshack.us\/img193\/7682\/nutatingenginesealing36.jpg\" style=\"margin: 0px 0px 10px 10px; float: right; cursor: pointer;\" \/><\/a><a href=\"http:\/\/img6.imageshack.us\/img6\/4227\/nutate2.gif\"><img decoding=\"async\" src=\"http:\/\/img6.imageshack.us\/img6\/4227\/nutate2.gif\" style=\"margin: 0px 0px 10px 10px; float: right; cursor: pointer;\" width=\"400\" \/><\/a><a href=\"http:\/\/img6.imageshack.us\/img6\/4772\/d8c4f8af95ffc54513f0a50.gif\"><img decoding=\"async\" src=\"http:\/\/img6.imageshack.us\/img6\/4772\/d8c4f8af95ffc54513f0a50.gif\" style=\"margin: 0px 0px 10px 10px; float: right; cursor: pointer;\" width=\"400\" \/><\/a>Nutation is what a coin does toward the end of its motion when you spin it, when it wobbles around the edge, and rotates at the same time.<\/p>\n<p>The Nutating engine is similar to a Wankel rotary, only instead of having a triangular rotor that orbits and spins around the crankshaft, it has a disk that wobbles as it rotates (bottom pic for animation).<\/p>\n<p>The military is <a href=\"http:\/\/www.flightglobal.com\/articles\/2009\/09\/11\/331644\/aluminium-nutating-engine-in-combustion-tests.html\">funding the development of an aluminum prototype<\/a>, which promises to double (or more)the power to weight ratio for small engines, where turbines lose much of their advantage.<\/p>\n<p>Right now, they are looking at a power to weight ratio of  1.6:1 or so, which is a pretty remarkable number.<\/p>\n<p>A <a href=\"http:\/\/gltrs.grc.nasa.gov\/reports\/2006\/TM-2006-214342.pdf\">NASA study<\/a> (PDF) is also available.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nutation is what a coin does toward the end of its motion when you spin it, when it wobbles around the edge, and rotates at the same time. The Nutating engine is similar to a Wankel rotary, only instead of having a triangular rotor that orbits and spins around the crankshaft, it has a disk &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1007,1128,1025],"tags":[],"class_list":["post-191200","post","type-post","status-publish","format-standard","hentry","category-aviation","category-propulsion","category-technology"],"_links":{"self":[{"href":"https:\/\/www.panix.com\/~msaroff\/40years\/wp-json\/wp\/v2\/posts\/191200"}],"collection":[{"href":"https:\/\/www.panix.com\/~msaroff\/40years\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.panix.com\/~msaroff\/40years\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.panix.com\/~msaroff\/40years\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.panix.com\/~msaroff\/40years\/wp-json\/wp\/v2\/comments?post=191200"}],"version-history":[{"count":0,"href":"https:\/\/www.panix.com\/~msaroff\/40years\/wp-json\/wp\/v2\/posts\/191200\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.panix.com\/~msaroff\/40years\/wp-json\/wp\/v2\/media?parent=191200"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.panix.com\/~msaroff\/40years\/wp-json\/wp\/v2\/categories?post=191200"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.panix.com\/~msaroff\/40years\/wp-json\/wp\/v2\/tags?post=191200"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}