Aviation Historian 30 / J.-C.Carbonel - France's Air Pioneers: Antoine P.Filippi

On September 5, 1912, Leon Bathiat reached a height of 1,000m (3,300ft) in a Sommer monoplane fitted with a Cyrnos rotating wing, as seen here. Two months later he was at it again, reaching 3,000m (10,000ft) in 42 min on November 16, although it is likely the Sommer was fitted with a more conventional propeller on that occasion.