Re: An-124 and wing dihedral

Date:         29 May 98 02:43:35 
From:         Jim Wolper <wolpjame@cwis.isu.edu>
Organization: ISU Mathematics
References:   1
Followups:    1 2
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Karl Swartz wrote:

> Would someone care to enlighten me on the aerodynamics of wing dihedral?

Many aircraft with flexible wings appear to have anhedral
(that is, "negative dihedral" ) when sitting still, but effectively
have dihedral when developing lift because the wingtips bend
upwards.  This was one of the noticeable quirks of the 767
when it first came out.

I imagine that the 747 wings are stiffer than the 777
wings because of the extra bending moment from the outboard
engines.

Jim Wolper ATP/PhD/CFI