qslinger
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Boeing 787 - Extended Parking In The Sun

Wed Sep 11, 2013 8:24 am

Hi All:

When 787's are parked at Everette, I notice that the windows are covered by black cover. Correct me if I am wrong, but I guess they do this to keep the sunlight out and to keep it from bleaching the seats or interior etc

My question is, what does the operator do when the 787 is parked outside for a few days in the hot sun with no external power attached. Will the window dimmer still work without power? How will they keep the sun out in those cases without having to black cover the window's all over again.

Apologies if this topic has been covered.
Raj Koona
 
baldwin471
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RE: Boeing 787 - Extended Parking In The Sun

Wed Sep 11, 2013 2:41 pm

May be something to do with the electro-chromatic windows? Pure guess work here though.
 
KELPkid
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RE: Boeing 787 - Extended Parking In The Sun

Wed Sep 11, 2013 6:51 pm

It is not unusual at all for aircraft under storage to have the windows covered. Plexiglas is quite sensitive to the sun, and prolonged exposure to the sun can lead to the the windows starting to haze and crack. I'm sure Boeing does not want to have to replace the outer pane of the cabin windows when they pull aircraft out of storage  

In service, the aircraft windows are regularly cleaned and polished, which prevents the problem.
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HAWK21M
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RE: Boeing 787 - Extended Parking In The Sun

Thu Sep 12, 2013 5:25 pm

Quoting qslinger (Thread starter):
I notice that the windows are covered by black cover

Is this cover on from the inside or is it the dimmer selected on.
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duncan16
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RE: Boeing 787 - Extended Parking In The Sun

Fri Sep 13, 2013 10:23 pm

My understanding is that the dimmable windows use a technology called electrochromatic. These dimmable windows go to a clear state when there is no power. They cannot select that the windows be darkened. So, a maximum amount of heat is transmitted inboard when parked on the ramp. This must be why the black covers are needed.
 
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KarelXWB
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RE: Boeing 787 - Extended Parking In The Sun

Sat Sep 14, 2013 4:20 pm

Not just the windows, they seal off every hole:


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pygmalion
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RE: Boeing 787 - Extended Parking In The Sun

Thu Sep 19, 2013 11:00 pm

the dimmable windows arent installed until after the interior goes in. The airplanes in storage dont have interiors.. Interiors install only takes a couple weeks. The dimmable portion of the window is a separate portion from the structural pressure portion that is seen on the outside.

the exterior window panes are covered just to prevent dirt and grit from sitting on the pane and degrading the optical quality over a medium storage period. Covering has nothing to do with the CFRP or UV.
 
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KarelXWB
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RE: Boeing 787 - Extended Parking In The Sun

Fri Sep 20, 2013 11:05 am

Quoting Pygmalion (Reply 6):
The airplanes in storage dont have interiors..

You sure about that? I read the first batch had interiors, the original idea was to deliver them directly after certification.
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bikerthai
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RE: Boeing 787 - Extended Parking In The Sun

Fri Sep 20, 2013 1:44 pm

Quoting Pygmalion (Reply 6):
the dimmable windows arent installed until after the interior goes in.

I thought the "dimmable" function is integrated in the window itself. The only thing that is on the sidewall are the individual switches. Even without the switch, the windows can be controlled by the attendant panel.


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HAWK21M
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RE: Boeing 787 - Extended Parking In The Sun

Sat Sep 21, 2013 7:16 pm

Quoting KarelXWB (Reply 5):
Not just the windows, they seal off every hole:

Under Line Mx parking too.....Are you sure?.
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