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I've always wondered why there is that tiny little hole in the bottom of airplane windows. It turns out it's got a couple of purposes! Sour (more)

I've always wondered why there is that tiny little hole in the bottom of airplane windows. It turns out it's got a couple of purposes!

Sourced the information from airplane manuals and airmechanic forums. One could make the argument that it's for keeping structural integrity on the outer most pane, but I think the way I described it implies that.

https://www.quora.com/Is-it-possible-for-a-human-to-punch-through-an-airplane-window-with-their-bare-fist

http://www.airliners.net/aviation-forums/tech_ops/read.main/170548/

https://www.reddit.com/r/askscience/comments/2ee279/why_do_airplane_windows_need_to_have_that_hole/

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