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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<strong>Eurocopter</strong> All Rights Reserved<br />
1945 WNF 341V4: Freidrich von Doblh<strong>of</strong>f (Wierner Neustader Flugzeugwerke), Austria<br />
• 10-meter-diameter rotor driven by blade tip jets (air/fuel mixture) which does not<br />
require anti-torque<br />
• Pusher propeller at the rear which was only ground tested; the propeller shown<br />
on the V3 & V4 models creates an airflow for flight control over the tail yaw control<br />
surfaces<br />
• 140 hp (104 kW) BMW-Bramo Sh 14A engine<br />
• Maximum weight: 640 kg<br />
• At the end <strong>of</strong> the war, the V4 and von Doblh<strong>of</strong>f embarked for the USA where von<br />
Doblh<strong>of</strong>f participated actively in the McDonnell XV-1; a member <strong>of</strong> his team,<br />
Theodor Laufner, headed to France to participate in the development <strong>of</strong> the SO<br />
1221 Djinn "cold" jet rotor drive. Finally, August Stepan, another engineer from<br />
the von Doblh<strong>of</strong>f team, but also a WNF342 pilot, joined Fairey Aviation in Great<br />
Britain to develop a jet rotor on the Jet-Gyrodyne and the Rotodyne.
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