History: Igor Sikorsky with his Helicopter #2 in Kiev, 1910 [550x390]

https://i.redd.it/hj47h4jwjot01.jpg via /r/HistoryPorn https://www.reddit.com/r/HistoryPorn/comments/8ecjno/igor_sikorsky_with_his_helicopter_2_in_kiev_1910/?utm_source=ifttt