Gekrümmte flugzeugfenster,wozu?
Wozu sind Flugzeugfenster eig. gekrümmt und oval und nicht normal gebaut wie in einem Zug oder Auto?
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In the cabin there is much higher pressure than outside, and in addition, glass is rather difficult in relation to its stability. Because it is also very cold outside, the windows must be correspondingly well heat-insulating.
The smaller the windows, the more weight is saved (at different places), and the more fuel (which is expensive). If we were also satisfied with planes without windows, we would also build them.
Ah, okay.
In the case of a “notched component” mechanical stresses occur at the notched superhigh.
mechanical voltage sigma=F/A (force per unit area)
F Power in N (Newton)
A cross-sectional area in mm^2 (square millimeter)
MERKE
MERKE : In the case of pressure vessels, the surfaces are curved, because the mechanical stresses are better distributed.
If you were to use a straight plate at the end faces in a compressed air container, then it would be unfavorable.
Standardised forehead plates on pressure vessels are “collar trays” for which there is a DIN standard (Deutsches Institut für Normung).
Aircraft cells are also known as pressure vessels.
FAZIT: On the windows of aircraft, there are no sharp edges and the window surfaces must be bent.
In order to adapt to the contour of the fuselage and thus to allow a smooth, trouble-free air flow.
There are plans to leave the windows that weaken the structure completely (as with a submarine) and replace it with camera shots.
Airbus has even presented a study for a windowless cockpit. By the way, the cockpit discs at A320/A330/A340 are not curved, but are planned.
This has nothing to do with the corners; this is another construction site.
At B747, the front panes were extremely curved and are also extremely expensive per piece (sometimes a six-digit amount).
Camera shots? What a stupid plan. I’m just standing in a plane like this if it can’t be avoided, but all short distances would have died for me!
hardware02, it has often been reported enough.
For the structure, of course, it would be better than today, where many holes weaken the hull.
But it’s just a study first. Among other things, there is the idea to provide the side wall with a screen that extends from the ceiling to the floor. I’m sure it’s not bad. Here is some interesting information:
http://www.traveller.com.au/windowless-planes-and-vformations-the-future-for-airbus-axrr
http://money.cnn.com/2016/12/22/news/companies/planes-without-windows/
And for the “windowless cockpit” there is a patent application from Airbus in the USA. Patent #: US 2014/0180508 A1
and an info about it:
http://newatlas.com/windowless-cockpit-airbus/32816/
The windows in an ICE are also rounded and therefore not angular. They also adapt to the hull. The same applies to front panes in cars.
Round corners can be sealed more easily than square corners. In the case of round corners, the seal can be placed around the curve, in the case of angular corners it should be cut open and pushed into the edge, which is not so good.
For this reason, bull eyes are also round in ships because they are better to seal and no voltage peaks occur at the corners.
If aeroplane windows would be square, the loading stresses occurring in the corners would concentrate and there would be faster fatigue breaks. (Gab it in the 60s with fatal consequences) With roundings, the tension can be better distributed. They are bent for aerodynamic reasons to better adapt to the hull structure.
So that the load due to the pressure difference is distributed over the entire window frame and not on the corner.
The last time you installed square windows on aeroplanes ended with a rather violent series of accidents (see de Havilland Comet).
The pressure is better distributed, as with bridges or our feet
Because of the load lying on the window
But the pressure is much lower than on the ground….
When it comes to pressure and load on the windows…
On the one hand, in large heights, a high pressure difference between the inside and the outside and on the other hand, the cell is also loaded by torsion vibration etc.
Because around windows can withstand much better pressure and other influences
because the hull is also bent