Lub tsev tiv thaiv tom qab muaj cov haujlwm tiv thaiv kev nyab xeeb, kho kom zoo nkauj lub tsheb thiab txhim kho cov yam ntxwv aerodynamic ntawm lub tsheb. Hais txog kev nyab xeeb, lub tsheb tuaj yeem ua lub luag haujlwm tsis tau muaj nyob rau hauv cov ntaub ntawv ntawm kev sib tsoo qis kev sib tsoo thiab tiv thaiv sab hauv ntej thiab tom qab lub cev; Nws tuaj yeem tiv thaiv cov neeg taug kev thaum muaj xwm txheej nrog cov neeg taug kev. Nyob rau hauv cov nqe lus ntawm tsos, nws yog qhov zoo nkauj thiab tau dhau los ua ib qho tseem ceeb kom dai cov tsos ntawm tsheb; Nyob rau tib lub sijhawm, lub tsheb tsheb tsheb tom qab tiv thaiv muaj qee yam cuam tshuam ntawm luberodynamic.