1940 ? 2010: Brief history of hybrid helicopters around ... - Eurocopter
1940 ? 2010: Brief history of hybrid helicopters around ... - Eurocopter
1940 ? 2010: Brief history of hybrid helicopters around ... - Eurocopter
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All Rights Reserved American Helicopter Society Summer 2006 vertiflite<br />
2007 XH-49A SpeedHawk: Piasecki (based on the Sikorsky SeaHawk), USA<br />
• Technological demonstrator for the VTDP (Vectored Thrust Ducted Propeller)<br />
concept, modern version <strong>of</strong> the Ring Tail which flew on the Piasecki 16H<br />
Pathfinders I and II. Designed on the basis <strong>of</strong> a Sikorsky YSH-60 Seahawk,<br />
equipped with a wing and a ducted propeller with vectored thrust<br />
• 16.4-meter-diameter SeaHawk standard rotor.<br />
• MT five-bladed propeller - Vectored Thrust Ducted Propeller providing anti-torque,<br />
propulsion, yaw control and fore-and-aft pitch balance<br />
• Piper Aerostar wing with a span reduced to approximately 9 meters<br />
• Two 1250 kW General Electric T700 turbo-shaft engines from the SeaHawk,<br />
driving the rotor and the VTDP; in phase II <strong>of</strong> the program it was scheduled to add<br />
a third turbo-shaft engine (440 kW Rolls Royce 250C30) dedicated to propulsion<br />
• Maximum weight: 10,000 kg<br />
• Maiden flight on June 29, 2007, at the hands <strong>of</strong> S. Schellberg
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