Quote:
Originally Posted by AdamHeard
I totally misread your question then.
Similar concepts apply, just inverse. The beam is substantially weaker due to that flange removal. Depending on how the gearbox is attached, the gearbox itself could add a lot of support to the beam where material is removed.
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Great explanation
The loss of a continual flange will not only decrease the second moment of area, but will also "chase" the stresses to the ends of the flange.