The first public film (1942) of the US Army’s first helicopter, the Sikorsky XR-4I love the oddly upbeat music in these old school videos Subscribe Notify of new follow-up commentsnew replies to my comments Label {} [+] Name* Email* Website Current ye@r * Leave this field empty Label {} [+] Name* Email* Website Current ye@r * Leave this field empty 0 Comments Inline FeedbacksView all comments
