elephant, that is a nice group of photos you've found there. I believe some of them are in Alan Durkota's massive work, "The Imperial Russian Air Service, Famous Pilots and Aircraft of World War One".
Thanks for sharing.
Three RFC Brass Hats were strolling down a street in London. Two walked into a bar, the third one ducked.
Former Cold War Warrior, USAF Security Service 1974-1978, E-4, Morse Systems Intercept, England, Europe, and points above."pippy-pahpah-pippy pah-pip-pah"