Originally Posted by upndsky

I saw a documentary a while ago on the making of the 777 and they showed a slow-mo clip of a fan blade coming off a test engine (don't know which manufacturer). The Kevlar ring buckled like rubber but held. It was impressive as all get go, to see that thing get all warped and all. It's unbelievable the amount of force involved with those massive blades spinning.

I tried to find a clip on youtube showing the test but I couldn't find one. If you come across it, check it out. It really is impressive.