oncemorealoft asked:-
Is the Blume Bl.500 an ME108 derivative
No it was based on the Arado Ar 79.
In 1956 after restrictions on aircraft construction in Germany were lifted Walter Blume produced, a modernized version of the Ar 79. The canopy was extended rearward, the fin was replaced by a more modern form, the wing replaced by an all metal wing and the landing gear replaced by a tricycle undercarriage.. The original Hirth engine Hirth being no longer available, was replaced by the Lycoming O-320.