Originally Posted by
lomapaseo
PineappleFrenzy
yes it's hard to believe
The blade loss video show large motions at the inlet, but motion alone is not enough. You have to couple it with mass and rate of change.
The even more challenging forces are gust loads in extreme turbulence or aircraft upsets and these don't end up like what you see in the pictures. As long as the inlet remains a box structure designed to aircraft principals it will hold up through all types of loadings.
You get some interesting aeroelastic effects at higher IAS. So it's not just about the structure witholding the fan when it fails. Those blade off tests don't show incoming air at around 250-270kts IAS. Only takes a part to become partially detached into the airflow and it will start to tear apart. Even if it witholding the fan, the weakened structure may struggle to stay attached. Be more concerned what could happen if the cowl, accelerated in the air flow, were to impact the vertical or horizontal stab.