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 />
1962-1969: Bell 533 model: Bell Helicopter Company, USA<br />
• Research helicopter developed on the basis <strong>of</strong> a Bell YH-40 which is equipped<br />
with various rotors (approximately 13-meter-diameter two-bladed, three-bladed<br />
and four-bladed rotors), with an auxiliary propulsion and/or a wing<br />
• 1400 shp (1030 kW) Lycoming T53-L-13 turbo-shaft engine driving the rotor<br />
• In the auxiliary propulsion versions: use <strong>of</strong> two 420 daN thrust Continental J69-T-<br />
9 jet engines, then two 770 daN thrust J69-T-29 jet engines and finally two 1500<br />
daN thrust Pratt & Whitney jet engines<br />
• In the winged version: addition <strong>of</strong> an 8-meter-span wing<br />
• Maiden flight on August 10, 1962<br />
• Reached a speed <strong>of</strong> 275 kt on April 15, 1969
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