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A comment on How Qantas Ferried an Engine on the Wing of a 747. Parent comment

Re:How Qantas Ferried an Engine on the Wing of a 747 by sbierwagen on Saturday January 09, 2016 @02:55PM (#10872600)
Adding a bigger fairing will increase the cross section of the object, increasing the form drag. (Bigger things push more air out of their way when moving)

https://en.wikipedia.org/wiki/Parasitic_drag#Form_drag

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