Bir eksene dikey olarak ba\u011flanan iki veya daha \u00e7ok kanattan ib\u00e2ret, i\u00e7inde bulundu\u011fu ak\u0131\u015fkana
\n(hava veya s\u0131v\u0131) itme veya \u00e7ekme hareketi veren \u00e2let. Geceleri \u0131\u015f\u0131k etraf\u0131nda d\u00f6nen kelebeklere de
\nperv\u00e2ne denir. B\u00fcy\u00fck ve T\u00fcrkiye Sel\u00e7uklular\u0131nda, \u0130lhanl\u0131larda dirliklerle (has, zeamet, t\u0131mar) ilgili
\nfermana da perv\u00e2ne ad\u0131 verilirdi.<\/p>\n
Perv\u00e2neler d\u00f6nen bir milin g\u00f6be\u011finde ba\u011flant\u0131l\u0131d\u0131rlar. Mil d\u00f6n\u00fcnce perv\u00e2neler de d\u00f6ner. Kanatlar kat\u0131 Kullan\u0131ld\u0131\u011f\u0131 yerler de\u011fi\u015fik olan perv\u00e2nelerin \u00e7ap ve bi\u00e7imleri, g\u00f6rd\u00fc\u011f\u00fc hizmete g\u00f6re hesap edilir. On sekizinci as\u0131rda perv\u00e2ne kullanma fikri do\u011fmu\u015f ve 1776\u2019da Bushuell yapt\u0131\u011f\u0131 denizalt\u0131da iki perv\u00e2ne Bir eksene dikey olarak ba\u011flanan iki veya daha \u00e7ok kanattan ib\u00e2ret, i\u00e7inde bulundu\u011fu ak\u0131\u015fkana (hava veya s\u0131v\u0131) itme veya \u00e7ekme hareketi veren \u00e2let. Geceleri \u0131\u015f\u0131k etraf\u0131nda d\u00f6nen kelebeklere de perv\u00e2ne…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[345,317],"tags":[2220],"class_list":["post-3580","post","type-post","status-publish","format-standard","hentry","category-askeri","category-is-dunyasi","tag-pervane"],"_links":{"self":[{"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=\/wp\/v2\/posts\/3580"}],"collection":[{"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3580"}],"version-history":[{"count":4,"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=\/wp\/v2\/posts\/3580\/revisions"}],"predecessor-version":[{"id":7262,"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=\/wp\/v2\/posts\/3580\/revisions\/7262"}],"wp:attachment":[{"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3580"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3580"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3580"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nolmayan ak\u0131\u015fkana gerekli hareketi verebilmesi i\u00e7in de\u011fi\u015fik \u015fekillerde e\u011fik olarak yap\u0131l\u0131r. Deniz
\nara\u00e7lar\u0131nda kullan\u0131lanlar k\u0131sa ve geni\u015f, u\u00e7aklardakiler ise uzun ve dard\u0131r. Perv\u00e2neye gerekli hareket
\nverildikten sonra d\u00f6nmesiyle meydana getirdi\u011fi enerji, i\u00e7inde bulundu\u011fu ak\u0131\u015fkan\u0131 (suyu, havay\u0131)
\nharekete ge\u00e7irir. Bu hareketten do\u011fan enerji, su \u00fczerindeki perv\u00e2neli deniz arac\u0131n\u0131 hareket ettirir.
\nU\u00e7aklardaki <\/a>perv\u00e2nenin h\u00e2s\u0131l etti\u011fi enerji ise bu v\u00e2s\u0131tay\u0131 havaland\u0131r\u0131r ve havada u\u00e7urur. V\u00e2s\u0131taya
\n\u00f6nden ba\u011flanan perv\u00e2ne \u00e7ekici, arkadan ba\u011flanm\u0131\u015fsa itici vazife g\u00f6r\u00fcr.<\/p>\n
\nBilhassa u\u00e7a\u011f\u0131n belli bir h\u0131za ula\u015ft\u0131ktan sonra kalkabilmesi ve havada s\u00fcratle yol alabilmesi i\u00e7in
\nkullan\u0131lacak perv\u00e2nenin \u00e7ap ve bi\u00e7iminin \u00e7ok iyi hesap edilmesi gerekir. Bu hesaplamada perv\u00e2nenin
\n\u00e7ap\u0131, kanatlar\u0131n faydal\u0131 y\u00fczeyiyle b\u00fct\u00fcn y\u00fczeyi aras\u0131ndaki oran gibi hususlar dikkate al\u0131n\u0131r. Gemi
\nperv\u00e2neleri bronz, d\u00f6kme demirden, b\u00e2zan da \u00e7elikten, u\u00e7aklarda kullan\u0131lanlar ise tahta, m\u00e2den
\nala\u015f\u0131m\u0131 veya \u00e7elikten yap\u0131l\u0131r.<\/p>\n
\nkullanm\u0131\u015ft\u0131r. \u00dczerinde yap\u0131lan devaml\u0131 \u00e7al\u0131\u015fmalar sonucunda perv\u00e2neler, 1840 y\u0131llar\u0131nda gemilerde
\nkullan\u0131lmaya ba\u015fland\u0131. Zamanla \u00e7arklar\u0131n yerini alan perv\u00e2neler bilhassa dalgal\u0131 denizde \u00e7arktan daha
\nfaydal\u0131 olmaktayd\u0131. Augustin Normand ad\u0131ndaki bir Frans\u0131z, yapt\u0131\u011f\u0131 \u00e7ok kanatl\u0131 bir perv\u00e2neyle saatte
\nyirmi kilometreye yak\u0131n bir h\u0131z sa\u011flad\u0131. Bundan sonra perv\u00e2neler b\u00fct\u00fcn motorlu ve buharl\u0131 deniz
\nv\u00e2s\u0131talar\u0131nda kullan\u0131lmaya ba\u015fland\u0131. Gemilerde, teknelerde yayg\u0131n olarak kullan\u0131lan perv\u00e2neler, 20.
\nas\u0131rda insanlar\u0131n havada u\u00e7mas\u0131n\u0131 sa\u011flayan en \u00f6nemli unsur oldu. Zam\u00e2n\u0131m\u0131zda da b\u00e2z\u0131 u\u00e7aklarda
\nh\u00e2l\u00e2 perv\u00e2ne kullan\u0131lmakta, helikopterdekilerse, arac\u0131n her y\u00f6ne hareketiyle havada dengesini
\nsa\u011flamaktad\u0131r.<\/p>\n","protected":false},"excerpt":{"rendered":"