Vim li cas 787 tsis muaj winglets?

Cov txheej txheem:

Vim li cas 787 tsis muaj winglets?
Vim li cas 787 tsis muaj winglets?
Anonim

Lub 787 yog daim ntawv huv tsim Dab tsi ua rau Boeing 787 Dreamliner txawv yog tias nws tsis muaj winglets vim nws yog daim ntawv huv huv. … Thaum tus qauv tistips tuaj yeem txo qis dua li 4.5%, tus qauv raked tis tuaj yeem txo nws los ntawm 5.5%.

Vim li cas ho tsis txhua lub dav hlau muaj tis?

Winglets yog upwardly khoov cov lus qhia ntawm lub dav hlau tis uas pab txo qis vortex luag. … dav hlau me me, xws li cov dav hlau sib ntaus sib tua, tsis xav tau tis ntev, yog vim li cas tsis txhua lub dav hlau muaj tis.

Dab tsi yog 787 Dreamliner?

Qee qhov tsis tau xa tawm Boeing 787 Dreamliners muaj qhov teeb meem tsim khoom tshiab, FAA tau hais. Qhov teeb meem nyob ze ntawm Dreamliner lub qhov ntswg thiab yuav raug kho ua ntej 787s raug xa, nws hais. Boeing yav dhau los tau tso tseg kev xa khoom ntawm 787 Dreamliner vim muaj teeb meem tswj tau zoo.

Vim li cas 787 thiaj li muaj tis flex?

Cia tis rau flex txhim kho aerodynamic stability. Lub dav hlau yog streamlined ntau dua thiab muaj kev cuam tshuam tsawg dua. Nws pab muab kev caij tsheb zoo dua rau cov neeg caij tsheb thiab txo qis kev kub ntxhov. 787 fly-by-wire thev naus laus zis kuj tseem pab tau ntawm no kom nce lossis txo qis tis trailing ntug thaum caij nkoj.

Vim li cas cov dav hlau tis nkhaus?

dav hlau tis feem ntau nkhaus rau saum thiab tiaj tus hauv qab, vim Bernoulli Txoj Cai. Bernoulli's Principple hais tias huab cua txav ceev tau qis duahuab cua siab thiab qeeb zog cua muaj cua siab dua. … Vim yog txoj kab nkhaus saum tis, huab cua txav nrawm dua rau saum tis ces nyob hauv qab.

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