Baumgärtl Heliofly III


The Baumgärtl Heliofly III/57 and Baumgärtl Heliofly III/59 were 1940s experimental backpack helicopters designed and built by the Austrian-designer Paul Baumgärtl. Following on from his earlier experiments with strap-on autogyros the Heliofly III/57 was powered by two  Argus As 8 piston engines each driving a single-blade of the contra-rotating rotors. A problem with the supply of the As 8 engine forced a  re-design to use one  engine, 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. Specifications (16hp)

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References

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Bibliography

Nowarra, Heinz J.. Die Deutsche Luftruestung 1933-1945 - Vol.1 - AEG-Dornier. Bernard & Graefe Verlag. 1993. Koblenz. (Gesamtwek),  (Band 1)

1940s Austrian experimental aircraft
1940s Austrian helicopters
Heliofly III
Twin-engined piston helicopters
Single-engined piston helicopters
Aircraft first flown in 1942

pl:Heliofly III