[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.issecv.cz\/velka-vyzva-pro-tichy-nadzvukovy-letoun-nasa\/#Article","mainEntityOfPage":"https:\/\/www.issecv.cz\/velka-vyzva-pro-tichy-nadzvukovy-letoun-nasa\/","headline":"Velk\u00e1 v\u00fdzva pro tich\u00fd nadzvukov\u00fd letoun NASA","name":"Velk\u00e1 v\u00fdzva pro tich\u00fd nadzvukov\u00fd letoun NASA","description":"P\u0159\u00edli\u0161n\u00fd hluk omezoval lety Concordu nad vysoce obydlen\u00fdmi oblastmi. Pokud by v\u0161ak byl tento nedostatek odstran\u011bn, d\u00e9lka jednotliv\u00fdch let\u016f by se mohla zkr\u00e1tit na polovinu.…","datePublished":"2023-06-05","dateModified":"2023-06-05","author":{"@type":"Person","@id":"https:\/\/www.issecv.cz\/author\/#Person","name":"","url":"https:\/\/www.issecv.cz\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/cbcb92d2d459f60d1dc08d6e5973c6b0ed1017e8a3b51da0599e03841cfa81e6?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/cbcb92d2d459f60d1dc08d6e5973c6b0ed1017e8a3b51da0599e03841cfa81e6?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"issecv.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.issecv.cz\/wp-content\/uploads\/img_a314706_w2167_t1525724847.jpg","url":"https:\/\/www.issecv.cz\/wp-content\/uploads\/img_a314706_w2167_t1525724847.jpg","height":0,"width":0},"url":"https:\/\/www.issecv.cz\/velka-vyzva-pro-tichy-nadzvukovy-letoun-nasa\/","wordCount":351,"articleBody":"P\u0159\u00edli\u0161n\u00fd hluk omezoval lety Concordu nad vysoce obydlen\u00fdmi oblastmi. Pokud by v\u0161ak byl tento nedostatek odstran\u011bn, d\u00e9lka jednotliv\u00fdch let\u016f by se mohla zkr\u00e1tit na polovinu. Pro dos\u00e1hnut\u00ed tohoto c\u00edle napl\u00e1novala vesm\u00edrn\u00e1 agentura NASA v\u00fdvoj prototypu letadla s omezenou zvukovou exploz\u00ed, ke kter\u00e9 doch\u00e1z\u00ed p\u0159i p\u0159ekro\u010den\u00ed rychlosti zvuku. Projektem byla pov\u011b\u0159ena spole\u010dnost Lockheed Martin, kter\u00e1 za zak\u00e1zku obdr\u017e\u00ed 247,5 milion\u016f dolar\u016f. C\u00edlem je postavit letoun, kter\u00fd bude p\u0159i letu rychlost\u00ed 1 500 km\/h stejn\u011b hlasit\u00fd jako zav\u0159en\u00ed dve\u0159\u00ed auta. Toto letadlo, kter\u00e9 NASA nazvala X-plane, bude hotovo do roku 2021 a nad americk\u00fdmi m\u011bsty se za\u010dne testovat v roce 2022.To, co se po\u017eaduje, je, aby p\u0159\u00edslu\u0161n\u00fd akustick\u00fd t\u0159esk byl velmi slab\u00fd, co\u017e maj\u00ed umo\u017enit aerodynamika a speci\u00e1ln\u00ed konstrukce letounu. Probl\u00e9m nicm\u00e9n\u011b nespo\u010d\u00edv\u00e1 v letu nadzvukovou rychlost\u00ed. NASA o\u010dek\u00e1v\u00e1, \u017ee budouc\u00ed prototyp bude l\u00e9tat ve v\u00fd\u0161ce 16,7 km, tedy uprost\u0159ed stratosf\u00e9ry. A pr\u00e1v\u011b p\u0159i t\u00e9to rychlosti se ztr\u00e1c\u00ed ohlu\u0161uj\u00edc\u00ed r\u00e1na typick\u00e1 pro akustick\u00fd t\u0159esk. Zdali letadlo let\u00ed stratosf\u00e9rou nadzvukovou rychlost\u00ed tedy nebude mo\u017en\u00e9 prost\u00fdm poslechem ur\u010dit. N\u00e1razov\u00e1 vlna, kter\u00e1 m\u016f\u017ee let nadzvukovou rychlost\u00ed doprov\u00e1zet, toti\u017e nedos\u00e1hne a\u017e na zem, jeliko\u017e viskozita atmosf\u00e9ry ji pohlt\u00ed.Nejv\u011bt\u0161\u00ed probl\u00e9m by tak m\u011bli p\u0159edstavovat vzlet a p\u0159ist\u00e1n\u00ed \u010d\u00edm n\u00ed\u017ee a bl\u00ed\u017ee zalidn\u011bn\u00fdm oblastem letadlo polet\u00ed. Nadzvukov\u00e1 letadla l\u00e9taj\u00ed pod hladinou rychlosti zvuku h\u016f\u0159e, proto\u017ee jsou navr\u017eena tak, aby l\u00e9tala vysokou rychlost\u00ed. A pr\u00e1v\u011b p\u0159i vzletu a p\u0159ist\u00e1n\u00ed nemaj\u00ed jinou mo\u017enost, ne\u017e odstartovat nebo dos\u00e1hnout nulov\u00e9 rychlosti. Probl\u00e9m t\u011bchto letadel je, \u017ee vy\u017eaduj\u00ed vysok\u00fd v\u00fdkon. Principem nadzvukov\u00e9ho letadla je rychlost, jeliko\u017e jeho k\u0159\u00eddla jsou obvykle mal\u00e1 a maj\u00ed n\u00edzkou schopnost podp\u011bry. To znamen\u00e1, \u017ee pokud let\u00ed letadlo vysokou rychlost\u00ed, let\u00ed z\u00e1rove\u0148 plynule.                                                                                                                                                                                                                                                                                                                                                                                        3.6\/5 - (9 votes)        "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Velk\u00e1 v\u00fdzva pro tich\u00fd nadzvukov\u00fd letoun NASA","item":"https:\/\/www.issecv.cz\/velka-vyzva-pro-tichy-nadzvukovy-letoun-nasa\/#breadcrumbitem"}]}]