Here is a good documentary from 1982 on the history of the development of the helicopter. It covers the full development of the helicopter from the very beginning in the initial stages of this programme. However, it then moves into the most current developments in rotor technology in the early 1980's and this is where there is some really fascinating footage of various experimental helicopters, including my favourite, the Hughes OH-6A NOTAR test-bed. I'm not sure if this video has featured in a previous thread before but this video has only recently been posted up on youtube in its entirety so I thought it was worth highlighting here. Thanks.
http://www.youtube.com/watch?v=oupef1lpTBE
500 Fan.
http://www.youtube.com/watch?v=oupef1lpTBE
500 Fan.
