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The Baumgärtl Heliofly III/57 and Baumgärtl Heliofly III/59 were 1940s experimental
backpack helicopter
A backpack helicopter is a helicopter motor and rotor and controls assembly that can be strapped to a person's back, so they can walk about on the ground wearing it, and can use it to fly. It uses a harness like a parachute harness and should hav ...
s designed and built by the Austrian-designer
Paul Bäumgartl.
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.
[Nowarra, Heinz J.. ''Die Deutsche Luftruestung 1933-1945 - Vol.1 - AEG-Dornier''. Bernard & Graefe Verlag. 1993. Koblenz. (Gesamtwek), (Band 1)]
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)
See also
References
Notes
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
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pl:Heliofly III