Turbine D
I guess the cracks are more random in nature that what I would have thought.
Every landing is different. I was turned on by a a hard landing at Osh Kosh recorded below.
This shows the enormous wing flex during a hard landing with a walk through. Every landing is different as I would expect every crack to be (hard or not). Be it a hard landing or not, be it a large crack or not in these rib feet. Sideload/torque in a crosswind is probably a significant factor to add to the random nature.