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"Heliofly III/57 was powered by two 8 hp (6 kW) Argus As 8" - that's rather unlikely as one Argus As 8 engine tips the scale at 113 kg. Same goes for Heliofly III/59, its mass is given as 35 kg which would be pretty impossible with the engine itself weighting in at 113 kg. Surely it must be a different engine perhaps with a similar name/designation. Michał Rosa ( talk) 04:26, 19 January 2013 (UTC) reply