Using memoirs and biographies is unavoidable since there is no psychiatric documentation addressing Great War airmen's psychology. Also, as is true for any human group, individuality trumps uniformity and you are left with seeking clues in the writing of the people who served. Voss, Luke, Boelcke, Ball, Coppens, Udet, McCudden, and Mannock--as examples-- are more striking in their uniqueness rather than representing a uniform psychological type. I have found the following memoirs to be exemplary sources for getting
in touch with airmen's psychology-- as much as we can a century after the
fact:
Udet, Ernst: "How I Shot Down 62 Planes" (linked under his entry under
"Aces" on this forum)
McCudden, James: "Flying Fury: Five Years in the Royal Flying Corps"
Stark, Rudolf: "Wings of War"
Coppens, Willy: "Flying in Flanders"
Lee, Arthur S.G.: "Open Cockpit" & "No Parachute"
Kilduff, Peter: "Black Fokker Leader" (Kilduff had extensive communication
with
Carl Degelow while he was researching the book, so it is unusually
authentic)
Grinnell-Milne, Duncan W.: "Wind in the Wires"
Lewis, Cecil A.: "Sagittarius Rising"
Revell, Alex: "Brief Glory: The Life of
Arthur Rhys Davids, DSO, MC"
(again, the author had access to his letters & personal papers)
Adrian Hellwig's fine book on
Roderic Dallas, "Australian Hawk Over
the Western Front," is a rewarding source, as is (changing
wars) Chuck Yeager's autobiography. Good hunting--it's a fascinating subject!
Josquin