{"id":133377,"date":"2024-07-10T02:09:00","date_gmt":"2024-07-10T01:09:00","guid":{"rendered":"https:\/\/yachtingnews.com\/?p=133377"},"modified":"2024-07-09T09:23:58","modified_gmt":"2024-07-09T08:23:58","slug":"helices-de-superficie-luca-radice","status":"publish","type":"post","link":"https:\/\/www.yachtingnews.com\/pt-br\/helices-de-superficie-luca-radice\/","title":{"rendered":"H\u00e9lices de superf\u00edcie: conversamos sobre elas com Luca Radice"},"content":{"rendered":"\t\t
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As h\u00e9lices de superf\u00edcie s\u00e3o um conceito estabelecido h\u00e1 mais de quarenta anos, representando uma evolu\u00e7\u00e3o significativa na navega\u00e7\u00e3o a motor. Essa inova\u00e7\u00e3o \u00e9 creditada ao engenheiro italiano Buzzi, que em 1975 projetou h\u00e9lices de superf\u00edcie ajust\u00e1vel. Em 1979, Howard Arneson, outro entusiasta da velocidade, foi o pioneiro das unidades de superf\u00edcie Arneson.<\/p>\n

\"produ\u00e7\u00e3o<\/p>\n

Visitamos Luca Radice, <\/a>um especialista altamente experiente em h\u00e9lices, que nos ajudou a entender melhor o funcionamento desse acess\u00f3rio crucial.<\/p>\n

Como funcionam as h\u00e9lices de superf\u00edcie e quais s\u00e3o suas caracter\u00edsticas?<\/i><\/strong><\/p>\n

A premissa \u00e9 que as h\u00e9lices de superf\u00edcie podem ser montadas em barcos com uma determinada pot\u00eancia; caso contr\u00e1rio, n\u00e3o faz sentido aplic\u00e1-las. Eles s\u00e3o projetados especificamente para permitir que o barco atinja altas velocidades, mas s\u00e3o totalmente in\u00fateis sem a pot\u00eancia adequada do motor.<\/p>\n

O conceito em si \u00e9 bastante simples: para aumentar a velocidade, \u00e9 necess\u00e1rio reduzir a resist\u00eancia. A resist\u00eancia ao movimento para frente de um barco se deve a dois fatores: resist\u00eancia \u00e0s ondas e resist\u00eancia ao atrito. As h\u00e9lices de superf\u00edcie funcionam metade imersas e metade fora da \u00e1gua, utilizando os efeitos da cavita\u00e7\u00e3o para aumentar a velocidade quando a h\u00e9lice n\u00e3o est\u00e1 submersa, reduzindo assim o atrito.<\/p>\n

\"h\u00e9lices<\/p>\n

O perfil foi projetado para operar em condi\u00e7\u00f5es diferentes das h\u00e9lices tradicionais que ficam constantemente submersas. No caso de h\u00e9lices de superf\u00edcie, a cavita\u00e7\u00e3o deve necessariamente ocorrer para explorar o aumento da press\u00e3o nas p\u00e1s. Durante sua emerg\u00eancia da \u00e1gua, eles prendem o ar, o que gera maior impulso e rota\u00e7\u00e3o mais r\u00e1pida.<\/p>\n

Qual material \u00e9 mais adequado, bronze ou a\u00e7o?<\/i><\/strong><\/p>\n

\u00c9 uma discuss\u00e3o interessante; quase todas as h\u00e9lices de a\u00e7o s\u00e3o feitas de AISI316<\/b> com alta resist\u00eancia, mas isso significa que elas n\u00e3o podem sofrer mais altera\u00e7\u00f5es depois de fundidas. A vantagem do bronze, como a nossa liga Mibral<\/b>, que atinge 75\/80 kg\/mm2 de resist\u00eancia, aproximando-se dos 90 kg\/mm2 do a\u00e7o 17-4ph, \u00e9 que as h\u00e9lices de bronze t\u00eam uma resist\u00eancia muito semelhante \u00e0 do a\u00e7o. Eles permitem a usinagem com m\u00e1quinas de 5 eixos e, o que \u00e9 mais importante, t\u00eam elasticidade no alongamento, o que n\u00e3o acontece com o a\u00e7o. Por exemplo, bater em um tronco no mar com uma h\u00e9lice de a\u00e7o pode resultar na perda de uma l\u00e2mina devido \u00e0 sua fragilidade. Com o bronze, uma l\u00e2mina pode se dobrar, mas o cruzeiro ainda pode continuar.<\/p>\n

\"eliche<\/p>\n

Como as h\u00e9lices de superf\u00edcie s\u00e3o projetadas? <\/i><\/span><\/strong><\/p>\n

O conceito b\u00e1sico \u00e9 estabelecer o desempenho; atualmente, os programas calculam as h\u00e9lices praticamente sem erros, quase como uma ci\u00eancia exata.<\/p>\n

O desafio est\u00e1 em dimension\u00e1-los, n\u00e3o apenas em di\u00e2metro, mas tamb\u00e9m em espessura, para suportar o estresse cont\u00ednuo. A Eliche Radice desenvolveu um software interno exclusivo para h\u00e9lices de superf\u00edcie que testa a durabilidade em laborat\u00f3rio e determina a espessura ideal para o melhor desempenho.<\/p>\n

Desempenho e diferen\u00e7as entre uma op\u00e7\u00e3o e outra?<\/i><\/strong><\/p>\n

\u00c9 dif\u00edcil responder, pois um barco projetado com h\u00e9lices de superf\u00edcie \u00e9 destinado a essa finalidade. A vantagem \u00e9 que voc\u00ea n\u00e3o tem ap\u00eandices na \u00e1gua, o que resulta em menos resist\u00eancia durante o movimento. Como mencionado anteriormente, isso permite atingir altas velocidades<\/a> e, ao mesmo tempo, reduzir o consumo de combust\u00edvel. Se o objetivo n\u00e3o for a velocidade, provavelmente ser\u00e1 melhor optar por um sistema de propuls\u00e3o tradicional.<\/p>\n

Sobre a Eliche Radice<\/strong><\/h3>\n

A ELICHE RADICE \u00e9 uma empresa com mais de cem anos de hist\u00f3ria e hoje se orgulha de ter toda a cadeia de produ\u00e7\u00e3o em suas pr\u00f3prias instala\u00e7\u00f5es, o que permite o controle total de todo o processo, desde a chegada do material \u00e0 fundi\u00e7\u00e3o at\u00e9 a entrega. As inspe\u00e7\u00f5es e verifica\u00e7\u00f5es cont\u00ednuas da empresa garantem que os produtos sejam de excelente qualidade, o que \u00e9, sem d\u00favida, um dos principais fatores que permitiram que a empresa se tornasse l\u00edder no mercado.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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\"production\"<\/div>
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As h\u00e9lices de superf\u00edcie s\u00e3o um conceito estabelecido h\u00e1 mais de quarenta anos, representando uma evolu\u00e7\u00e3o significativa na navega\u00e7\u00e3o a motor. Essa inova\u00e7\u00e3o \u00e9 creditada ao engenheiro italiano Buzzi, que em 1975 projetou h\u00e9lices de superf\u00edcie ajust\u00e1vel. Em 1979, Howard Arneson, outro entusiasta da velocidade, foi o pioneiro das unidades de superf\u00edcie Arneson. Visitamos Luca […]<\/p>\n","protected":false},"author":49,"featured_media":133335,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mo_disable_npp":"","footnotes":""},"categories":[1731,1756,1653],"tags":[1722],"class_list":["post-133377","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-entrevistas","category-fornecimento-de-barcos","category-news-pt-br","tag-eliche-radice-pt-br"],"yoast_head":"\nH\u00e9lices de superf\u00edcie: conversamos sobre elas com Luca Radice - Yachting News<\/title>\n<meta name=\"description\" content=\"As h\u00e9lices de superf\u00edcie s\u00e3o um conceito estabelecido h\u00e1 mais de quarenta anos, representando uma evolu\u00e7\u00e3o significativa na navega\u00e7\u00e3o a motor...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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