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]
| Heliofly III | |
|---|---|
| Role | Experimental backpack helicopter |
| National origin | Austria |
| Manufacturer | Paul Baumgärtl |
| Designer | Paul Baumgärtl |
| First flight | 1942 |
| Number built | 1 |
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]
Specifications (16hp)
editData from [1] The Illustrated Encyclopedia of Aircraft
General characteristics
- Crew: 1
- Length: 6.10 m (20 ft 0 in)
- Empty weight: 35 kg (77 lb)
- Gross weight: 120 kg (265 lb)
- Powerplant: 1 × piston engine , 12 kW (16 hp)
- Main rotor diameter: 2 × 6.10 m (20 ft 0 in)
See also
editRelated lists
References
editNotes
editBibliography
edit- The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). Orbis Publishing.
- Nowarra, Heinz J.. Die Deutsche Luftruestung 1933-1945 - Vol.1 - AEG-Dornier. Bernard & Graefe Verlag. 1993. Koblenz. ISBN 3-7637-5464-4 (Gesamtwek), ISBN 3-7637-5465-2 (Band 1)
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