from Jeff Quitney on Vimeo.
US Army Helicopter Orientation ‘Introduction to Rotary Wing Flight’ 1952
This is a NAVY film but really interesting because it was produced in 1952 (27-minutes)
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US Army Helicopter Orientation ‘Introduction to Rotary Wing Flight’ 1952
Helicopter Orientation: “Introduction to Rotary Wing Flight” 1952 US Navy MN-7306a (Army MISC-8158)