Simviation Forum - Vulture shatters airplane windshield

Feb 17^th, 2009 at 11:43am

aussiewannabe Offline
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http://abclocal.go.com/ktrk/story?section=news/national_world&id=6662103

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Reply #1 - Feb 17^th, 2009 at 12:28pm

Anxyous Offline
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Thank God, the vulture didn't hit him...

Though I find it a bit un-intelligent, to say that birds crashed into the US Airways plane... The plane crashing into the birds sounds more likely Cheesy

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Reply #2 - Feb 18^th, 2009 at 3:51pm

OVERLORD_CHRIS Offline
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And this is why I like large planes with 3 ply glass laminate.

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Reply #3 - Feb 19^th, 2009 at 5:38am

expat Offline
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OVERLORD_CHRIS wrote on Feb 18^th, 2009 at 3:51pm:

And this is why I like large planes with 3 ply glass laminate.

It in not the three ply glass (though it helps) that stops them coming through but window heating, without that you would probably have the same effect.

Matt

« Last Edit: Feb 19^th, 2009 at 8:40am by expat »

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Reply #4 - Feb 19^th, 2009 at 8:21am

specter177 Offline
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I like the comment on the story! Grin

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I bet the bird doesn't have the guts to do that again!

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Reply #5 - Feb 19^th, 2009 at 10:55am

OVERLORD_CHRIS Offline
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expat wrote on Feb 19^th, 2009 at 5:38am:

OVERLORD_CHRIS wrote on Feb 18^th, 2009 at 3:51pm:

And this is why I like large planes with 3 ply glass laminate.

It in not the three ply glass (though it helps) that stops them coming through but window heating, without that you would probably have the same effect.

Matt

I don't know, the glass used on heavy/wide bodies, is about 3 inches think, pretty strong.

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Reply #6 - Feb 19^th, 2009 at 11:51am

expat Offline
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OVERLORD_CHRIS wrote on Feb 19^th, 2009 at 10:55am:

expat wrote on Feb 19^th, 2009 at 5:38am:

OVERLORD_CHRIS wrote on Feb 18^th, 2009 at 3:51pm:

And this is why I like large planes with 3 ply glass laminate.

It in not the three ply glass (though it helps) that stops them coming through but window heating, without that you would probably have the same effect.

Matt

I don't know, the glass used on heavy/wide bodies, is about 3 inches think, pretty strong.

You are right, thick glass is strong, but when it is hit at speed, something had to give. Best that the window frame does not. Window heating, has two functions, the first is to give the pain a little bit of give in the event of a bird strike, a secondary function of window heating is anti icing.

Matt

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Reply #7 - Feb 20^th, 2009 at 11:52am

OVERLORD_CHRIS Offline
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expat wrote on Feb 19^th, 2009 at 11:51am:

OVERLORD_CHRIS wrote on Feb 19^th, 2009 at 10:55am:

expat wrote on Feb 19^th, 2009 at 5:38am:

OVERLORD_CHRIS wrote on Feb 18^th, 2009 at 3:51pm:

And this is why I like large planes with 3 ply glass laminate.

It in not the three ply glass (though it helps) that stops them coming through but window heating, without that you would probably have the same effect.

Matt

I don't know, the glass used on heavy/wide bodies, is about 3 inches think, pretty strong.

You are right, thick glass is strong, but when it is hit at speed, something had to give. Best that the window frame does not. Window heating, has two functions, the first is to give the pain a little bit of give in the event of a bird strike, a secondary function of window heating is anti icing.

Matt

I am going to have to take a picture of our window at work, I think yours my be built different.

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Reply #8 - Feb 20^th, 2009 at 1:03pm

expat Offline
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OVERLORD_CHRIS wrote on Feb 20^th, 2009 at 11:52am:

expat wrote on Feb 19^th, 2009 at 11:51am:

OVERLORD_CHRIS wrote on Feb 19^th, 2009 at 10:55am:

expat wrote on Feb 19^th, 2009 at 5:38am:

OVERLORD_CHRIS wrote on Feb 18^th, 2009 at 3:51pm:

And this is why I like large planes with 3 ply glass laminate.

It in not the three ply glass (though it helps) that stops them coming through but window heating, without that you would probably have the same effect.

Matt

I don't know, the glass used on heavy/wide bodies, is about 3 inches think, pretty strong.

You are right, thick glass is strong, but when it is hit at speed, something had to give. Best that the window frame does not. Window heating, has two functions, the first is to give the pain a little bit of give in the event of a bird strike, a secondary function of window heating is anti icing.

Matt

I am going to have to take a picture of our window at work, I think yours my be built different.

[img]

Not quite sure what you mean here. What I am saying is that window heating as in the elements that you highlighted, the main function is to heat the window and add a small amount of flexibility to the window. It is glass on the outer layers, but acrylic (amongst other compounds) on the inner. It is the heat that gives the inner layers a small amount of flex, enabling it to absorb an impact from a foreign object. There are a couple of videos showing tests from a chicken gun with and without heat. Unfortunately I only saw them when doing a 737 maintenance license. I have trawled youtube and the web, but cannot find them. Ask about at your place of work, maybe they are available.

Matt

PETA People Eating Tasty Animals.

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Reply #9 - Feb 20^th, 2009 at 10:56pm

B-Valvs Ex Member

This story reminds me of the Mythbusters Chicken Cannon episode.

Roll Eyes

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Reply #10 - Feb 21^st, 2009 at 7:17am

Ivan Offline
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those 'heater elements' are the wire attachment areas... there are very thin wires running down to the other one at the bottom. Same as on your car rear window heater but way more expensive
heard someone say that a Opel Astra heated windscreen is over 1500 euros, while a normal one is just under 400 euros

Russian planes: IL-76 (all standard length ones), Tu-154 and Il-62, Tu-134 and An-24RV&&&&AI flightplans and repaints can be found here

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Reply #11 - Feb 21^st, 2009 at 9:57am

expat Offline
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Ivan wrote on Feb 21^st, 2009 at 7:17am:

those 'heater elements' are the wire attachment areas... there are very thin wires running down to the other one at the bottom. Same as on your car rear window heater but way more expensive
heard someone say that a Opel Astra heated windscreen is over 1500 euros, while a normal one is just under 400 euros

I am not disagreeing, but no aircraft window that I have ever seen or replaced has what you have described. What is highlighted in the above picture is a small wire element that when heated dissipates heat through the window from that element itself and not via wires as in a car. Also all of the elements are not used at once. Half are spare. When the in use elements fail, instead of replacing the window, you can connect the control wire to the spare element (then enter the defective element into the HIL/MDDR)

Matt

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Reply #12 - Feb 21^st, 2009 at 11:03am

OVERLORD_CHRIS Offline
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On a 737, are they always on? Because our windows are only on as needed by push button. That's why I say it has not effected our windows like you say it does on the 737, we hit birds all the time in the Summer, with the defog off, that's why I don't see how this gives it flex, especial if it is not on 85% of the time to warm the window up during bird strikes.

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Reply #13 - Feb 21^st, 2009 at 1:37pm

expat Offline
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OVERLORD_CHRIS wrote on Feb 21^st, 2009 at 11:03am:

On a 737, are they always on? Because our windows are only on as needed by push button. That's why I say it has not effected our windows like you say it does on the 737, we hit birds all the time in the Summer, with the defog off, that's why I don't see how this gives it flex, especial if it is not on 85% of the time to warm the window up during bird strikes.

Looks like I am not making myself clear, and yes on the 737 and A320 it is on all the time. Below are a couple of sites with window heating/bird strike threads.

And here it start at the beginning

7th poster starts the conversation on this subject

I hope this makes what I am trying to say a bit clearer Undecided

Matt

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Reply #14 - Feb 21^st, 2009 at 7:26pm

Ivan Offline
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heater or no heater... those windows arent designed to stop 2 kilo plus birds.

Hitting a fully grown condor or swan (about 12 kilo maximum)with a 737 will probably end up in losing the windows too

Russian planes: IL-76 (all standard length ones), Tu-154 and Il-62, Tu-134 and An-24RV&&&&AI flightplans and repaints can be found here

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