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Development progress report on the Ryan XV-5A Vertifan VTOL jet for the US Army.
also see: "XV-5A Program Progress Report #4"
https://www.youtube.com/watch?v=ZtSKcImC94o
Public domain film produced by the contractor for the US Government, slightly cropped to remove uneven edges, with the aspect ratio corrected, and mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or e
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