Sikorsky Piasecki X-49
Encyclopedia
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See also
External links
- Jane's All The World's Aircraft - X-49A
- "High Speed Helicopter set for first flight in June" article on FlightGlobal.com
- Rotor and Wing Cover Story Dec 2007
- Vertiflite Cover Story Winter 2007
- Piasecki H-60/VTDP
- Aerospace Testing International Dec 2007
- Boeing Eyes X-49A Technology for Apache Attack Helicopter
- "Hot-Rod Helicopters". Air & Space magazine, 1 September 2009.
- Pushing helicopters faster - X-49A - Aviation Week Video