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Non-90 degree flanges... Are they as strong as 90 deg ones?

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Chlomo

Well-Known Member
Joined
Oct 8, 2014
Messages
120
Location
Seoul
Some of you may be designing aluminum riveted sheet metal airplanes that have graceful fuses and tapered wings. Thus the need for non-perpendicular flanges. Perhaps such projects are more suited to composites but let's assume we do it Aluminum stressed skin structure like Hummelbirds.
With appropriate thickness for given load I don't have any reasoning to believe that non perpendicular flanges are weaker than perpendicular ones but still I can't figure out why perpendicular flanges look more robust.
Are there any Hummel builders out there? Does a Hummel have any issues with flanges other than those related to forming? I see Hummelbirds have lots of circular fuse sections.
I don't know.. but boxlike sonexes sure look robust.
 
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