Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: An tsara 747 yayin da zirga-zirgar jiragen sama ke ƙaruwa a cikin shekarun 1960. Zamanin jigilar jiragen sama na kasuwanci, wanda Boeing 707 da Douglas DC-8 suka shahara sosai, ya kawo sauyi a tafiye-tafiye na nesa. Ko da kafin ta rasa kwangilar CX-HLS, Juan Trippe, shugaban Pan American World Airways (Pan Am), daya daga cikin manyan abokan cinikin jirgin saman su, ya nemi Boeing ya gina jirgin saman fasinja fiye da ninki biyu na 707. A wannan lokacin, cunkoson filin jirgin sama, wanda ya tsananta ta hanyar karuwar yawan fasinjojin da aka ɗauka a kan ƙananan ƙananan jiragen sama, ya zama matsala da Trippe ya yi tunanin za a iya magance shi ta hanyar sabon jirgin sama mai girma.A 1965, an canja Joe Sutter daga ƙungiyar ci gaban Boeing ta 737 don gudanar da nazarin zane don sabon jirgin sama, an riga an sanya lambar samfurin 747. Sutter ya fara nazarin zane tare da Pan Am da sauran kamfanonin jiragen sama, don fahimtar bukatun su. A lokacin, mutane da yawa sun yi tunanin cewa jirgin sama na 747 zai maye gurbinsa da jirgin sama na sufuri. Boeing ya amsa ta hanyar tsara 747 ta yadda za a iya daidaita shi cikin sauƙi don ɗaukar kaya kuma ya kasance cikin samarwa koda kuwa tallace-tallace na fasinja ya ragu. A cikin rawar mai ɗaukar kaya, buƙatar bayyananniya ita ce tallafawa hanyoyin jigilar kayayyaki waɗanda aka gabatar da su a lokaci guda. Kayan kwantena na yau da kullun suna da murabba'in 8 ft (2.4 m) a gaba (dan kadan ya fi girma saboda wuraren haɗewa) kuma ana samun su a cikin tsayin 20 da 40 ft (6.1 da 12 m). Wannan yana nufin cewa zai yiwu a goyi bayan 2 fadi 2 high tari na kwantena biyu ko uku layuka zurfi tare da fuselage size kama da baya CX-HLS aikin.  Tambaya: Waɗanne jirage biyu ne aka fi so da suka canja tafiye-tafiye na nesa?
Boeing 707 da Douglas DC-8