Tags: Aircraft.

The Piasecki X-49 SpeedHawk is a four-bladed twin-engined experimental compound helicopter under development by Piasecki Aircraft. The X-49A is based on the airframe of a Sikorsky YSH-60F Seahawk but utilizes Piasecki’s proprietary vectored thrust ducted propeller (VTDP) design and includes the addition of lifting wings.

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