{"id":18149,"date":"2023-11-23T08:00:13","date_gmt":"2023-11-23T06:00:13","guid":{"rendered":"https:\/\/www.welovecycling.com\/hu\/?p=18149"},"modified":"2023-11-17T16:06:00","modified_gmt":"2023-11-17T14:06:00","slug":"miert-tartott-olyan-sokaig-feltalalni-a-kerekpart","status":"publish","type":"post","link":"https:\/\/www.welovecycling.com\/hu\/kozosseg-es-kultura\/miert-tartott-olyan-sokaig-feltalalni-a-kerekpart\/","title":{"rendered":"Mi\u00e9rt tartott olyan sok\u00e1ig feltal\u00e1lni a ker\u00e9kp\u00e1rt?"},"content":{"rendered":"<p><strong>Mi\u00e9rt tartott az emberis\u00e9gnek t\u00f6bb ezer \u00e9vig, mire feltal\u00e1lt\u00e1k a ker\u00e9kp\u00e1rt? Feltehet\u0151en a Nap kerek form\u00e1ja ihlette meg a mezopot\u00e1miaiakat, akik a t\u00f6rt\u00e9nelem szerint el\u0151sz\u00f6r haszn\u00e1ltak kerekeket. Tal\u00e1lm\u00e1nyuk jelent\u0151sen megk\u00f6nny\u00edtette a neh\u00e9z rakom\u00e1nyok sz\u00e1ll\u00edt\u00e1s\u00e1t. <\/strong><\/p>\n<p><!--more--><\/p>\n<p>Persze voltak, akik m\u00e1sra haszn\u00e1lt\u00e1k a kereket. Az \u00f3kori harcosok eg\u00e9sz civiliz\u00e1ci\u00f3kat puszt\u00edtottak el k\u00e9tkerek\u0171, lovak \u00e1ltal h\u00fazott szekerekkel. Mindez sok sz\u00e1z \u00e9vvel azel\u0151tt t\u00f6rt\u00e9nt, hogy Karl von Drais n\u00e9met b\u00e1r\u00f3 k\u00e9t kereket kapcsolt egy fakerethez, \u00e9s elk\u00e9sz\u00edtette azt a furcsa k\u00fclsej\u0171 eszk\u00f6zt, amit ma minden id\u0151k els\u0151 ker\u00e9kp\u00e1rj\u00e1nak tekint\u00fcnk.<\/p>\n<p>A feltal\u00e1l\u00f3ja ut\u00e1n Draisine-nak nevezett protot\u00edpus egy fakeretb\u0151l \u00e9s vaskerekekb\u0151l \u00e1llt. Azel\u0151tt, hogy egy p\u00e1r ped\u00e1l n\u00f6velte volna az utaz\u00e1s sebess\u00e9g\u00e9t \u00e9s k\u00e9nyelm\u00e9t, a b\u00e1r\u00f3 &#8220;Laufmachine&#8221;-j\u00e1t csak a l\u00e1bat l\u00f3b\u00e1lva lehetett el\u0151re tolni. A f\u0151 k\u00e9rd\u00e9s azonban ez: ha az emberek m\u00e1r \u00e9vezredekkel ezel\u0151tt k\u00e9pesek voltak k\u00e9t kereket egym\u00e1s mell\u00e9 szerelni, mi\u00e9rt tartott olyan sok\u00e1ig r\u00e1j\u00f6nni, hogy a kerekek egym\u00e1ssal p\u00e1rhuzamosan is elhelyezhet\u0151k egyetlen tengelyen \u00f6sszek\u00f6tve? Elv\u00e9gre egy nagyon hossz\u00fa id\u0151szakr\u00f3l besz\u00e9l\u00fcnk, amikor a ker\u00e9kp\u00e1rfejleszt\u00e9s szempontj\u00e1b\u00f3l semmi l\u00e9nyeges nem t\u00f6rt\u00e9nt. Nos, a t\u00f6rt\u00e9n\u00e9szek sz\u00e1mos meggy\u0151z\u0151 magyar\u00e1zatot k\u00edn\u00e1lnak.<\/p>\n<figure id=\"attachment_18150\" aria-describedby=\"caption-attachment-18150\" style=\"width: 990px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/d2p6e6u75xmxt8.cloudfront.net\/12\/2023\/11\/Bicycle-Future-profimedia-0672586822-CVR.webp\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-18150 size-full\" src=\"https:\/\/d2p6e6u75xmxt8.cloudfront.net\/12\/2023\/11\/Bicycle-Future-profimedia-0672586822-CVR.webp\" alt=\"Bicycle\" width=\"990\" height=\"660\" srcset=\"https:\/\/d2p6e6u75xmxt8.cloudfront.net\/12\/2023\/11\/Bicycle-Future-profimedia-0672586822-CVR.webp 990w, https:\/\/d2p6e6u75xmxt8.cloudfront.net\/12\/2023\/11\/Bicycle-Future-profimedia-0672586822-CVR-300x200.webp 300w, https:\/\/d2p6e6u75xmxt8.cloudfront.net\/12\/2023\/11\/Bicycle-Future-profimedia-0672586822-CVR-768x512.webp 768w, https:\/\/d2p6e6u75xmxt8.cloudfront.net\/12\/2023\/11\/Bicycle-Future-profimedia-0672586822-CVR-400x267.webp 400w, https:\/\/d2p6e6u75xmxt8.cloudfront.net\/12\/2023\/11\/Bicycle-Future-profimedia-0672586822-CVR-272x182.webp 272w\" sizes=\"auto, (max-width: 990px) 100vw, 990px\" \/><\/a><figcaption id=\"caption-attachment-18150\" class=\"wp-caption-text\">Mi\u00e9rt tartott olyan sok\u00e1ig a ker\u00e9kp\u00e1r feltal\u00e1l\u00e1sa? \u00a9 Profimedia<\/figcaption><\/figure>\n<p>Ahogy fejl\u0151d\u00f6tt a technol\u00f3gia, \u00fagy fejl\u0151d\u00f6tt a f\u00e9mfinom\u00edt\u00e1s is. Az 1800-as \u00e9vek el\u0151tt nem \u00e1llt rendelkez\u00e9sre megfizethet\u0151 ac\u00e9l alapanyag \u00e9s nem voltak fejlett form\u00e1l\u00f3 elj\u00e1r\u00e1sok sem. A mai ker\u00e9ktervez\u00e9s csak akkor jelent meg igaz\u00e1n, mikor a nehezebb vasgerend\u00e1kat felv\u00e1ltott\u00e1k a k\u00f6nny\u0171 k\u00fcll\u0151s huzalok, \u00e9s a kor\u00e1bbi vassz\u00edjak helyett puha gumi ker\u00fclt a felnik k\u00fclsej\u00e9re. Ez persze nem ny\u00fajt magyar\u00e1zatot arra, hogy Draisine ker\u00e9kp\u00e1rja mi\u00e9rt nem \u00e9p\u00fclt meg m\u00e1r \u00e9vsz\u00e1zadokkal kor\u00e1bban, hiszen a f\u00e1b\u00f3l k\u00e9sz\u00fclt alaprajz nem ig\u00e9nyelte a fenti technol\u00f3gi\u00e1k egyik\u00e9t sem.<\/p>\n<p>Az utak min\u0151s\u00e9ge egy m\u00e1sik t\u00e9nyez\u0151, amit figyelembe kell venni. Az 1800-as \u00e9vek el\u0151tti vid\u00e9ki f\u00f6ldutak \u00e9s v\u00e1rosi macskak\u00f6ves utak l\u00e9nyegesen rosszabbak voltak, mint amiket manaps\u00e1g l\u00e1tni. A sim\u00e1bb fel\u00fclet\u0171 burkolatok csak az 1820-as \u00e9vekben jelentek meg. A megfelel\u0151 v\u00edzelvezet\u00e9st n\u00e9lk\u00fcl\u00f6z\u0151, ny\u00edlt csatorn\u00e1kkal ell\u00e1tott korai utak k\u00e9ts\u00e9gtelen\u00fcl k\u00e9pesek voltak let\u00f6rni minden er\u0151fesz\u00edt\u00e9st egy k\u00f6nny\u0171 \u00e9s emberi meghajt\u00e1s\u00fa j\u00e1rm\u0171 feltal\u00e1l\u00e1s\u00e1ra. A ker\u00e9kp\u00e1rosok k\u00e9s\u0151bbi megjelen\u00e9se ugyanakkor egyesek szerint el\u0151re mozd\u00edtotta az utak fejl\u0151d\u00e9s\u00e9t, hiszen ez okot adott arra, hogy a durva, kavicsos utakat sim\u00e1bb burkolatokra cser\u00e9lj\u00e9k.<\/p>\n<p>A ker\u00e9kp\u00e1r el\u0151tti id\u0151kben igencsak elterjedt volt a lovak haszn\u00e1lata. Ezek az \u00e1llatok teherb\u00edr\u00f3ak voltak \u00e9s b\u00e1rmilyen fel\u00fclettel megbirk\u00f3ztak. Nem csoda, hogy lassan v\u00e1ltott\u00e1k fel \u0151ket a fejlettebb versenyt\u00e1rsaik. T\u00f6rt\u00e9nelmi feljegyz\u00e9sek szerint a Tambora vulk\u00e1n 1816-os kit\u00f6r\u00e9s\u00e9t k\u00f6vet\u0151 &#8220;ny\u00e1r n\u00e9lk\u00fcli \u00e9v&#8221; volt a ker\u00e9kp\u00e1roz\u00e1s megjelen\u00e9s\u00e9nek hajnala. A katasztr\u00f3fa miatt az eg\u00e9sz vil\u00e1got hamu bor\u00edtotta, cs\u00f6kkent az \u00e1tlagh\u0151m\u00e9rs\u00e9klet \u00e9s romlott a gabonatermeszt\u00e9s. A lovak \u00e9heztek, \u00e9s nem tudtak megfelel\u0151 teljes\u00edtm\u00e9nyt ny\u00fajtani, \u00edgy az emberek alternat\u00edv\u00e1kat kezdtek keresni.<\/p>\n<p>A ker\u00e9kp\u00e1roz\u00e1s k\u00e9sei megjelen\u00e9s\u00e9ben emellett kultur\u00e1lis szempontok is szerepet j\u00e1tszhattak, mivel a t\u00e1rsadalom val\u00f3sz\u00edn\u0171leg nem volt felk\u00e9sz\u00fclve egy olyan csod\u00e1ra, hogy k\u00e9tkerek\u0171 alkot\u00e1sokon sz\u00e1guldoz\u00f3 embereket n\u00e9zzenek az utakon. F\u00e9lret\u00e9ve az \u00e9vsz\u00e1mokat, az egy\u00e9rtelm\u0171, hogy ha Drais b\u00e1r\u00f3 eredeti ker\u00e9kp\u00e1rja akkoriban m\u00e9g nem is volt egy k\u00e9nyelmes j\u00e1rg\u00e1ny, teljesen \u00faj ir\u00e1nyt adott a j\u00f6v\u0151beni k\u00f6zleked\u00e9snek.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mi\u00e9rt tartott az emberis\u00e9gnek t\u00f6bb ezer \u00e9vig, mire feltal\u00e1lt\u00e1k a ker\u00e9kp\u00e1rt? Feltehet\u0151en a Nap kerek form\u00e1ja ihlette meg a mezopot\u00e1miaiakat, [&hellip;]<\/p>\n","protected":false},"author":71,"featured_media":18152,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[],"global-categories":[],"class_list":["post-18149","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-kozosseg-es-kultura"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.3 (Yoast SEO v25.9) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Mi\u00e9rt tartott olyan sok\u00e1ig feltal\u00e1lni a ker\u00e9kp\u00e1rt?<\/title>\n<meta name=\"description\" content=\"Mi\u00e9rt tartott az emberis\u00e9gnek t\u00f6bb ezer \u00e9vig, mire feltal\u00e1lt\u00e1k a ker\u00e9kp\u00e1rt? Feltehet\u0151en a Nap kerek form\u00e1ja ihlette meg a mezopot\u00e1miaiakat, akik a t\u00f6rt\u00e9nelem szerint el\u0151sz\u00f6r haszn\u00e1ltak kerekeket. Tal\u00e1lm\u00e1nyuk jelent\u0151sen megk\u00f6nny\u00edtette a neh\u00e9z rakom\u00e1nyok sz\u00e1ll\u00edt\u00e1s\u00e1t.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.welovecycling.com\/hu\/kozosseg-es-kultura\/miert-tartott-olyan-sokaig-feltalalni-a-kerekpart\/\" \/>\n<meta property=\"og:locale\" content=\"hu_HU\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Mi\u00e9rt tartott olyan sok\u00e1ig feltal\u00e1lni a ker\u00e9kp\u00e1rt?\" \/>\n<meta property=\"og:description\" content=\"Mi\u00e9rt tartott az emberis\u00e9gnek t\u00f6bb ezer \u00e9vig, mire feltal\u00e1lt\u00e1k a ker\u00e9kp\u00e1rt? Feltehet\u0151en a Nap kerek form\u00e1ja ihlette meg a mezopot\u00e1miaiakat, akik a t\u00f6rt\u00e9nelem szerint el\u0151sz\u00f6r haszn\u00e1ltak kerekeket. Tal\u00e1lm\u00e1nyuk jelent\u0151sen megk\u00f6nny\u00edtette a neh\u00e9z rakom\u00e1nyok sz\u00e1ll\u00edt\u00e1s\u00e1t.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.welovecycling.com\/hu\/kozosseg-es-kultura\/miert-tartott-olyan-sokaig-feltalalni-a-kerekpart\/\" \/>\n<meta property=\"og:site_name\" content=\"\u0160koda We Love Cycling - Magyarorsz\u00e1g\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/WeLoveCyclingHungary\/\" \/>\n<meta property=\"article:published_time\" content=\"2023-11-23T06:00:13+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/d2p6e6u75xmxt8.cloudfront.net\/12\/2023\/11\/Bicycle-Nature-pexels-b-127016-CVR.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"990\" \/>\n\t<meta property=\"og:image:height\" content=\"660\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"hegyizs\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Adam Marsal\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.welovecycling.com\/hu\/kozosseg-es-kultura\/miert-tartott-olyan-sokaig-feltalalni-a-kerekpart\/\",\"url\":\"https:\/\/www.welovecycling.com\/hu\/kozosseg-es-kultura\/miert-tartott-olyan-sokaig-feltalalni-a-kerekpart\/\",\"name\":\"Mi\u00e9rt tartott olyan sok\u00e1ig feltal\u00e1lni a ker\u00e9kp\u00e1rt?\",\"isPartOf\":{\"@id\":\"https:\/\/www.welovecycling.com\/hu\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.welovecycling.com\/hu\/kozosseg-es-kultura\/miert-tartott-olyan-sokaig-feltalalni-a-kerekpart\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.welovecycling.com\/hu\/kozosseg-es-kultura\/miert-tartott-olyan-sokaig-feltalalni-a-kerekpart\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/d2p6e6u75xmxt8.cloudfront.net\/12\/2023\/11\/Bicycle-Nature-pexels-b-127016-CVR.webp\",\"datePublished\":\"2023-11-23T06:00:13+00:00\",\"author\":{\"@id\":\"https:\/\/www.welovecycling.com\/hu\/#\/schema\/person\/414a2aebf1801691a5320edb6468e194\"},\"description\":\"Mi\u00e9rt tartott az emberis\u00e9gnek t\u00f6bb ezer \u00e9vig, mire feltal\u00e1lt\u00e1k a ker\u00e9kp\u00e1rt? 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