TIL that when smoking was allowed on aircraft, engineers used nicotine stains on the outside of planes to detect microscopic cracks in the fuselage. Now that smoking is banned, these cracks have become much more difficult to detect. via /r/todayilearned


TIL that when smoking was allowed on aircraft, engineers used nicotine stains on the outside of planes to detect microscopic cracks in the fuselage. Now that smoking is banned, these cracks have become much more difficult to detect.
http://ift.tt/2uEUsOH

Submitted August 09, 2017 at 02:49AM by aljobar
via reddit http://ift.tt/2unf2bn

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