Interesting question and it might vary by aircraft, but I’m going to make a very educated guess regarding the most structurally sound part of an airplane.
It’s the wing and its attachment to the fuselage — although many wings continue through the fuselage to make the wing essentially a single structure.
I’ve seen pictures of airliner wings with maybe a hundred people standing on the wing. I couldn’t locate one, but here’s a picture of an older general aviation aircraft called a Bellanca Viking. This is a normal production aircraft, not designed for the high G Forces necessary for aerobatics.
And this is a Cessna 210, also a normal production aircraft
And to drive the point home, if you understand the concept of how a “lever” works, those people at the ends of the wings are applying a disproportionate amount of force on the wing’s attach points compared to those on the wing near the fuselage.
By – Joe Shelton
