{"id":838,"date":"2004-12-02T15:43:00","date_gmt":"2004-12-02T14:43:00","guid":{"rendered":"https:\/\/kids.esa.int\/spaceplanes\/"},"modified":"2026-10-08T00:32:50","modified_gmt":"2026-10-07T22:32:50","slug":"spaceplanes","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/et\/spaceplanes\/","title":{"rendered":"Kosmoselennukid"},"content":{"rendered":"<div class=\"lede\">\n<p>Korduvkasutatavate kosmoses\u00f5idukite orbiidile viimiseks ja lennutamiseks on mitmeid viise.<\/p>\n<p>Kosmoses\u00fcstik kasutab \u00f5hkut\u00f5usmiseks oma mootoreid koos kahe v\u00f5imsa tahkek\u00fctusega rakettkiirendajaga. Seda nimetatakse m\u00f5nikord \u2018\u00fcheastmeliseks orbiidile j\u00f5udmiseks\u2019.<\/p>\n<\/div>\n<p>\u00dcks kosmoses\u00fcstiku t\u00fc\u00fcpi kosmoselaeva probleem on k\u00fctuse ja raketimootorite poolt lisanduv kaal. Sellest hoolimata peab kosmoses\u00fcstik Maale tagasi p\u00f6\u00f6rduma nagu purilennuk. Sellel puuduvad reaktiivmootorid ja kui see m\u00f6\u00f6dub maandumisrajast, ei saa see teist katset teha.<\/p>\n<p>\u00dcks v\u00f5imalus kosmoselaeva suurust v\u00e4hendada on lasta sellel osa teekonnast lennukiga kaasa s\u00f5ita. N\u00e4iteks v\u00f5ib suur lennuk viia kosmoselennuki 10 km k\u00f5rgusele. Kui kosmoselennuk on j\u00f5udnud enamiku atmosf\u00e4\u00e4ri kohale, lastakse see lahti.<\/p>\n<p>Samuti on v\u00f5imalik kasutada raketti korduvkasutatava kosmoselaeva orbiidile viimiseks. 1990. aastate alguses uuris ESA v\u00e4ikese kosmoselennuki nimega Hermes orbiidile viimist Ariane-5 kanderaketi abil.<\/p>\n<p>Veel \u00fcks v\u00f5imalus kaalu kokku hoida v\u00f5iks olla uue p\u00f5lvkonna mootorite kasutuselev\u00f5tt, mis kasutavad t\u00f5usu esimesel etapil atmosf\u00e4\u00e4ri\u00f5hku. Alles siis, kui s\u00f5iduk j\u00f5uab kosmosesse, l\u00fclitutaks \u00fcle raketimootorile, mis kasutab pardal olevat hapnikku. Selliste mootorite valmimiseni on aga veel palju aastaid aega.<\/p>","protected":false},"excerpt":{"rendered":"<p>There are various ways to launch and fly reusable spacecraft. The Space Shuttle uses its own engines, together with two powerful solid rocket boosters, to get off the ground. This [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"esa_banner_image":"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2004\/12\/future_launchers5\/18249547-2-eng-GB\/Future_launchers.jpg","esa_banner_description":"","esa_banner_credit":"ESA-C. 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