cloudboy
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Headrests Must Be Lowered?

Fri May 31, 2013 1:06 pm

I was always curious about why they required headrests to be lowered during takeoff and landing. I can understand seats being upright, but what are the issues with headrests?
"Six becoming three doesn't create more Americans that want to fly." -Adam Pilarski
 
26point2
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RE: Headrests Must Be Lowered?

Fri May 31, 2013 2:00 pm

Same as putting seat upright and stowing things under the seat, it makes a clear path for emergency evacuation.
 
nws2002
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RE: Headrests Must Be Lowered?

Fri May 31, 2013 3:58 pm

The seats are tested to withstand forces in certain positions.
 
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TupolevTu154
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RE: Headrests Must Be Lowered?

Fri May 31, 2013 6:23 pm

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
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RE: Headrests Must Be Lowered?

Fri May 31, 2013 6:28 pm

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
 
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bikerthai
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RE: Headrests Must Be Lowered?

Fri May 31, 2013 6:53 pm

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.

bt
Intelligent seeks knowledge. Enlightened seeks wisdom.
 
Tod
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RE: Headrests Must Be Lowered?

Fri May 31, 2013 9:40 pm

Quoting cloudboy (Reply 4):
Really, I want to know if they can make seats with higher backs

There is also a requirement that flight attendants must be able to see 80 percent of the pax during taxi, take-off and landing.
 
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Jetlagged
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RE: Headrests Must Be Lowered?

Sun Jun 02, 2013 10:58 pm

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.
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