Date: 17 Sep 97 02:49:14 From: michael piersdorff <firstname.lastname@example.org> Organization: Industry Canada References: 1 2 Followups: 1
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jf mezei wrote: > But if the hump actually reduces drag, how come other Boeing planes > which were designed afterwards (767,777) don't have a hump too ? The 747 was designed to the same spec that the C-5 was: it had to have a through cargo capability (ie. open doors both front and back). Boeings designers chose to accommodate the cockpit in a hump, which is why it's there. Lockheed chose a different solution. If it weren't for that design compromise, it is doubtful that Boeing's engineers would have deliberately put a hump there, since the extra frontal area does increase drag. The amount it is increased can be alleviated somewhat by taking advantage of area ruling (as in the -400), even if inadvertently.