Popular Mechanics magazine, February 1914, page 267, an article describing an angle of attack indicator for "aeroplanes".
https://books.google.com/books?id=t...ce=gbs_ge_summary_r&cad=0#v=onepage&q&f=false
Too bad it took so long to catch on.
https://books.google.com/books?id=t...ce=gbs_ge_summary_r&cad=0#v=onepage&q&f=false
Too bad it took so long to catch on.