At the end of World War II the Zaunkönig registration "D-YBAR" was taken to the Royal Aircraft Establishment (RAE) at Farnborough for slow flying tests; given the British serial "VX190"., where amongst others, it was flown by Eric "Winkle" Brown CO Aero Flight, the aircraft also being soloed by the then-head of the RAE Aerodynamics Section, Handel Davies, after half an hour of ground instruction, and whose only previous piloting experience was as a pupil in a dual-control Miles Magister. It was sold to a British private owner in June 1949 as "G-ALUA", and then to the Experimental Flying Group and to the Ultra Light Aircraft Association, subsequently in 1974 to an Irish owner, being registered "EI-AYU", returning to Germany, in 1976, as "D-EBCQ". As of 2008, it was preserved in the Deutsches Museum collection at Oberschleissheim near Munich.