Originally Posted by KC10 FATboy

The C-17 has some very intersting resonance characteristics during AR. First, the tail wiggles (probably the turbies from #2). Second, the engines wiggle. Third, the wing flexes up and down end-to-end and it warps (or twists) from the weight of the engines pulling forward and down, so much so, it causes the winglets to visibly move forward. It's pretty cool.