History: The first Sikorsky S70 helicopter manned by Turkish pilots doing a loop. Legend says that the engineers who designed the helicopter challenged pilots all over the world to do a loop with it and that the Turkish ones were the only ones crazy enough to actually try it.(1990)[787 × 1024]

https://i.redd.it/1l26kkkmrauy.jpg via /r/HistoryPorn https://www.reddit.com/r/HistoryPorn/comments/682o7g/the_first_sikorsky_s70_helicopter_manned_by/?utm_source=ifttt