TupolevTu154 From Germany, joined Aug 2004, 2174 posts, RR: 28
Reply 3, posted (10 months 3 weeks 1 hour ago) and read 2115 times:
I think it's probably more to do with preventing/decreasing whiplash if the aircraft were to hit something or if an accident were to occur. Similar to the headrest in your car which technically should be far enough forward to support the back of your head at all times.
cloudboy From United States of America, joined Jan 2004, 793 posts, RR: 0
Reply 4, posted (10 months 3 weeks 1 hour ago) and read 2113 times:
Which would then make sense that it should be raised, no? I guess I dont understand how it contributes to structural integrity or poses an evacuation impediment. Really, I want to know if they can make seats with higher backs
"Six becoming three doesn't create more Americans that want to fly." -Adam Pilarski
bikerthai From United States of America, joined Apr 2010, 2007 posts, RR: 4
Reply 5, posted (10 months 3 weeks ago) and read 2107 times:
From a structural analysis stand point:
When a head rest is up and there is fore-aft load during a crash landing, there is more moment across the base (where the head rest attach to the seat). So with the head rest down, it has a better chance at staying put.
From an evacuation stand point:
Also I've read about crashes where passengers climbs over the seats to get out off the airplane. Lowering the head rest will reduce the amount of obstruction that passenger will see.
Jetlagged From United Kingdom, joined Jan 2005, 2532 posts, RR: 24
Reply 7, posted (10 months 2 weeks 4 days 20 hours ago) and read 1626 times:
Quoting cloudboy (Reply 4): Really, I want to know if they can make seats with higher backs
They can and do for aircraft with rearward facing seats. In that case you brace against the seat back and the full height headrest protects you. In a forward facing seat you brace against the seat in front, so your headrest position is immaterial. The kind of flimsy headrest you get in a normal seat is for comfort purposes only, it has no real strength, so is perhaps best folded out of the way. Even if a higher stronger headrest was provided, no matter how hard you try to brace against it, in a normal impact you will be thrown forward.
The glass isn't half empty, or half full, it's twice as big as it needs to be.