The Piasecki 16H-1A Pathfinder II ringtail compound demonstrator (left) and the Piasecki X-49A SpeedHawk Vectored Thrust Ducted Propeller (VTDP) compound demonstrator (right), on display during the ceremony to open the new Piasecki Heliplex in Coatesville, Pennsylvania. (VFS staff photo, May 31, 2023. CC BY-SA 4.0)
License: Creative Commons Attribution-ShareAlike
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