Heliofly III | |
---|---|
Role | Experimental backpack helicopter |
National origin | Austria |
Manufacturer | Paul Baumgärtl |
Designer | Paul Baumgärtl |
First flight | 1942 |
Number built | 1 |
The Baumgärtl Heliofly III/57 and Baumgärtl Heliofly III/59 were 1940s experimental backpack helicopters designed and built by the Austrian-designer Paul Baumgärtl. [1] Following on from his earlier experiments with strap-on autogyros the Heliofly III/57 was powered by two 8 hp (6 kW) Argus As 8 piston engines each driving a single-blade of the contra-rotating rotors. [1] [2]
A problem with the supply of the As 8 engine forced a re-design to use one 16 hp (12 kW) engine, [1] powering two rotors on a common co-axial shaft, with the engine driving one rotor directly and the other through gearing to overcome the torque effects. [1] [2]
Data from [1] The Illustrated Encyclopedia of Aircraft
General characteristics
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