{"id":1286,"date":"2020-08-19T08:10:00","date_gmt":"2020-08-19T11:10:00","guid":{"rendered":"https:\/\/museuweg.net\/blog\/?p=1286"},"modified":"2026-02-09T15:46:52","modified_gmt":"2026-02-09T18:46:52","slug":"como-funciona-o-helicoptero","status":"publish","type":"post","link":"https:\/\/museuweg.net\/blog\/como-funciona-o-helicoptero\/","title":{"rendered":"Como funciona o helic\u00f3ptero?"},"content":{"rendered":"\n

Podemos dizer que o helic\u00f3ptero \u00e9 um avi\u00e3o com asas m\u00f3veis: as h\u00e9lices (que tamb\u00e9m chamamos de rotor). E, diferentemente do avi\u00e3o, que s\u00f3 se desloca para a frente, ele pode pairar no ar, fazer manobras suaves para qualquer dire\u00e7\u00e3o e at\u00e9 andar de r\u00e9, porque suas p\u00e1s est\u00e3o sempre em movimento. Para que esse tipo de manobra saia bem, n\u00e3o \u00e9 nada simples, j\u00e1 que a tend\u00eancia natural do impulso provocado pela rota\u00e7\u00e3o das h\u00e9lices (o chamado torque) seria fazer a nave sair rodopiando como um pi\u00e3o. \u00c9 por isso que existe uma segunda h\u00e9lice que gira em p\u00e9 e produz uma for\u00e7a lateral: para contrabalancear o rotor da cauda e deixar seu \u201ccorpo\u201d parado enquanto as h\u00e9lices giram.<\/p>\n\n\n\n

Como funcionam as h\u00e9lices do helic\u00f3ptero?<\/strong><\/p>\n\n\n\n

\n
\"\"<\/figure>\n<\/figure>\n\n\n\n
  1. As l\u00e2minas t\u00eam a forma de perfis a\u00e9reos (asas de avi\u00e3o com perfil curvo), de modo que geram eleva\u00e7\u00e3o ao girar.<\/li>
  2. Cada l\u00e2mina pode girar sobre uma dobradi\u00e7a emplumada.<\/li>
  3. Os links verticais  empurram as l\u00e2minas para cima e para baixo, tornando-os girat\u00f3rios. Os links de passo movem-se para cima e para baixo, de acordo com o \u00e2ngulo das placas swash.<\/li>
  4. O mastro do rotor (um eixo central conectado ao motor pela transmiss\u00e3o) faz girar todo o conjunto da l\u00e2mina.<\/li>
  5. A tampa do cubo do rotor (acima dos rotores) ajuda a reduzir o arrasto aerodin\u00e2mico.<\/li>
  6. Existem dois motores turbo-eixo, um em cada lado dos rotores. Se um motor falhar, ainda deve haver energia suficiente do outro motor para aterrar o helic\u00f3ptero com seguran\u00e7a.<\/li><\/ol>\n\n\n\n

    Por que o helic\u00f3ptero n\u00e3o sai rodopiando?<\/strong><\/p>\n\n\n\n

    \u201cPara toda a\u00e7\u00e3o, sempre h\u00e1 uma rea\u00e7\u00e3o oposta de mesma intensidade.\u201d A Terceira Lei de Newton<\/a> pode ser aplicada de forma simples no funcionamento de um helic\u00f3ptero. <\/p>\n\n\n\n

    Seguindo a lei, quando a h\u00e9lice principal come\u00e7a a girar (a\u00e7\u00e3o), a fuselagem tende a girar em igual intensidade no sentido oposto (rea\u00e7\u00e3o). Essa for\u00e7a \u00e9 conhecida como torque.<\/p>\n\n\n\n

    \n
    \"\"<\/figure>\n<\/figure>\n\n\n\n

    Para combater essa rea\u00e7\u00e3o, Igor Sikorsky, o criador do helic\u00f3ptero, teve a genialidade de instalar uma h\u00e9lice na cauda da nave, que tamb\u00e9m fornece controle direcional. O funcionamento da h\u00e9lice da cauda \u00e9 semelhante ao da principal, exceto que elas podem ser inclinadas. O movimento da h\u00e9lice na cauda evita que o torque comprometa o voo da aeronave, fazendo com que o piloto tenha condi\u00e7\u00f5es necess\u00e1rias para fazer movimentos de emerg\u00eancia.<\/p>\n\n\n\n

    A aeronave mais vers\u00e1til e amplamente utilizada no mundo<\/strong><\/p>\n\n\n\n

    Ao longo dos anos, as inova\u00e7\u00f5es em design de helic\u00f3pteros tornaram as m\u00e1quinas mais seguras, mais confi\u00e1veis \u200b\u200be f\u00e1ceis de controlar. Por possu\u00edrem atributos diferentes do avi\u00e3o, por exemplo, eles podem ser utilizados em \u00e1reas congestionadas ou isoladas em que as aeronaves de asa fixa n\u00e3o seriam capazes de pousar ou decolar. A capacidade de pairar por longos per\u00edodos de tempo e de decolagem e aterragem vertical permite aos helic\u00f3pteros realizar tarefas que outras aeronaves n\u00e3o s\u00e3o capazes.<\/p>\n\n\n\n

    Por isso, hoje, os helic\u00f3pteros s\u00e3o utilizados para fins militares e civis, como transporte de tropas, apoio de infantaria, combate a inc\u00eandios, resgates, opera\u00e7\u00f5es entre navios e equipes entre plataformas petrol\u00edferas, transporte de empres\u00e1rios, evacua\u00e7\u00f5es sanit\u00e1rias, guindaste a\u00e9reo, pol\u00edcia e vigil\u00e2ncia de civis, transporte de bens etc.<\/p>\n\n\n\n

    Fonte: Canal Piloto<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

    Descubra como funciona a aeronave mais vers\u00e1til e amplamente utilizada no mundo.<\/p>\n","protected":false},"author":4,"featured_media":2242,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,21],"tags":[549,286,182,547,546,8,548,13],"class_list":["post-1286","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-eletricidade","category-tecnologia-2","tag-aeronave","tag-como-funciona","tag-fisica","tag-helice","tag-helicoptero","tag-motor","tag-rotor","tag-tecnologia"],"yoast_head":"\nComo funciona o helic\u00f3ptero? - Blog com Ci\u00eancia<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/museuweg.net\/blog\/como-funciona-o-helicoptero\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Como funciona o helic\u00f3ptero? 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