Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: Daya daga cikin manyan fasahohin da suka ba da damar tsara jirgin sama mai girma kamar 747 shi ne injin turbofan mai tsayi. An yi imanin cewa fasahar injin tana da ikon isar da sau biyu na ƙarfin turbojets na baya yayin cinye kashi ɗaya bisa uku na mai. General Electric ya fara wannan ra'ayi amma ya himmatu wajen haɓaka injin don C-5 Galaxy kuma bai shiga kasuwar kasuwanci ba sai daga baya. Pratt & Whitney kuma yana aiki a kan wannan ka'ida kuma, a ƙarshen 1966, Boeing, Pan Am da Pratt & Whitney sun amince da haɓaka sabon injin, wanda aka sanya JT9D don ba da ƙarfin 747.An tsara aikin tare da sabon hanyar da ake kira nazarin bishiyar kuskure, wanda ya ba da damar nazarin tasirin gazawar wani bangare don tantance tasirinsa ga sauran tsarin. Don magance damuwa game da aminci da tashi, ƙirar 747 ta haɗa da sake fasalin tsarin, tsarin hydraulic da aka sake amfani da shi, babban jirgin sama na saukowa sau huɗu da saman sarrafawa biyu. Bugu da ƙari, wasu daga cikin na'urori masu tasowa masu tasowa da aka yi amfani da su a cikin masana'antar sun haɗa da sabon zane, don ba da damar yin aiki daga filayen jiragen sama na yanzu. Waɗannan sun haɗa da slashes da ke gudana kusan duk tsawon reshen, da kuma ɓangarori uku masu ɓarna masu ɓarna a gefen gefen reshen. Fuka-fukan bangarori uku na fuka-fuki suna kara girman fuka-fuki da kashi 21 cikin dari kuma suna ɗagawa da kashi 90 cikin dari idan aka tura su gaba ɗaya idan aka kwatanta da tsarin da ba a tura su ba. Boeing ya yarda ya ba da 747 na farko ga Pan Am a ƙarshen 1969. Ranar bayarwa ta bar watanni 28 don tsara jirgin sama, wanda ya kasance kashi biyu bisa uku na lokacin al'ada. Tsarin ya yi sauri sosai har aka ba mutanen da suka yi aiki a kai laƙabi "Masu ban mamaki". Haɓaka jirgin sama ya kasance irin wannan ƙalubalen fasaha da na kuɗi wanda aka ce gudanarwa ta "yi fare kamfanin" lokacin da ta fara aikin.  Tambaya: Wane sifa aka ba wa na'urori masu tasowa tare da sabon zane?
ba shi damar yin aiki daga filayen jirgin sama na yanzu