Plane wings

Vic7 wrote:

Not a lie that they perform this test, although as previously pointed
out, the spar fails long before the wing-tips meet. I remember seeing
a PBS/History/Discover channel program about the initial production of
the B777. They had impressive footage of the destructive load testing
of the wings. IIRC they failed at a 40-something degree deflection.

I saw that footage too, it was amazing to watch. They were simultaneously
pulling both wingtips upwards with the rest of the fuselage anchored to
the floor. The tips were being pulled pretty slowly, perhaps a centimeter
or two per second, the motion was barely visible. The hangar was very
quiet as the wings bent more and more, then all of a sudden, the wings
snapped very violently and suddenly. Amazing to see.

Kevin.