Just shows how much you can test something but there is always an unknown factor
How very true.
It's interesting to to watch these videos BUT bear this in mind if you watch both.
The RR blade off test (like other aero engine manufactures) are testing for the failure and containment of fan blades on the air intake, why? because of bird strikes and bird strikes are common.
If you watch the second video about the Qantus flight (thank god no one died) you can see that part of the failed engine is perfectly in-tacked, it was an intermediate pressure turbine disc with much smaller blades which suffered an un contained failure.
I wonder if they test for these?? I guessing not
