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 />
1964 Lockheed XH-51A Compound: Lockheed, USA<br />
• Demonstrator for a compound helicopter obtained from two XH-51As (No.<br />
151263) equipped with a wing and a jet engine<br />
• 10.7-meter-diameter gyroscopic rigid four-bladed rotor from the original XH-51A<br />
• 1.8-meter-diameter tail rotor<br />
• 375 kW Pratt & Whitney PT6B-9 turbo-shaft engine for the rotor drive<br />
• 1180 daN thrust Pratt & Whitney J60-P-2 jet engine for the additional propulsion<br />
• 5-meter-span wing<br />
• Maximum weight: 2,000 kg<br />
• Maiden flight: April 10, 1965<br />
• Un<strong>of</strong>ficial record for a helicopter on June 19, 1967: 263 kt
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