{"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\/nb\/spaceplanes\/","title":{"rendered":"Romfly"},"content":{"rendered":"
\n

Det finnes ulike m\u00e5ter \u00e5 skyte opp og fly gjenbrukbare romfart\u00f8yer p\u00e5.<\/p>\n

Romfergen bruker sine egne motorer, sammen med to kraftige faststoffraketter, for \u00e5 l\u00f8fte seg fra bakken. Dette kalles noen ganger \u2018single stage to orbit\u2019.<\/p>\n<\/div>\n

Et problem med romfart\u00f8y av typen romferge er vekten som drivstoff og rakettmotorer tilf\u00f8rer. Likevel m\u00e5 romfergen returnere til Jorden som et seilfly. Den har ingen jetmotorer og kan ikke fly rundt for \u00e5 gj\u00f8re et nytt fors\u00f8k dersom den bommer p\u00e5 rullebanen.<\/p>\n

En m\u00e5te \u00e5 redusere st\u00f8rrelsen p\u00e5 romfart\u00f8yet p\u00e5 er \u00e5 la det bli fraktet p\u00e5 ryggen en del av veien. Et stort fly kan for eksempel frakte et romfly opp til en h\u00f8yde p\u00e5 10 km. N\u00e5r det befinner seg over det meste av atmosf\u00e6ren, slippes romflyet l\u00f8s.<\/p>\n

Det er ogs\u00e5 mulig \u00e5 bruke en rakett til \u00e5 skyte opp et gjenbrukbart romfart\u00f8y. Tidlig p\u00e5 1990-tallet unders\u00f8kte ESA muligheten for \u00e5 skyte opp et lite romfly kalt Hermes p\u00e5 toppen av Ariane-5-raketten.<\/p>\n

En annen m\u00e5te \u00e5 redusere vekten p\u00e5 kan v\u00e6re \u00e5 ta i bruk en ny generasjon motorer som utnytter luften i atmosf\u00e6ren i den f\u00f8rste delen av oppstigningen. F\u00f8rst n\u00e5r fart\u00f8yet n\u00e5r verdensrommet, vil det skifte til rakettdrift ved hjelp av oksygenet om bord. Det vil imidlertid ta mange \u00e5r f\u00f8r slike motorer blir en realitet.<\/p>","protected":false},"excerpt":{"rendered":"

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 […]<\/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. VIJOUX","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2004\/12\/Future_launchers5","esa_external_url":"","esa_external_new_window":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":true},"categories":[10,41,40],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-838","post","type-post","status-publish","format-standard","hentry","category-learn","category-rockets-technology","category-technology","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/838","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/comments?post=838"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/838\/revisions"}],"predecessor-version":[{"id":1981,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/838\/revisions\/1981"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/media?parent=838"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/categories?post=838"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/tags?post=838"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/panel?post=838"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/language?post=838"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/age?post=838"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/duration?post=838"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/resource_type?post=838"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/audience?post=838"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/wf_post_folders?post=838"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}