Red B.

There seem to bee some confusion as what a Jungmann is:

Bücker built two types of biplanes at the time of WWII:
The Bü-131 Jungmann which was a two seat primary trainer (figure below left).
The Bü-133 Jungmeister which was a one seat advanced trainer (figure below right).

All original Jungmanns used inverted inline engines and
all the Jungmeisters, except for the prototype, used radial engines

As the original engines got scarce the Swizz hit on the idea of replacing the original engine with a Lycoming in the aircraft they re-christened the Lerche (Lark). The aircraft was fitted with new wings of a nearly symmetrical airfoil section and a Lycoming O-320 of 150 HP. This modification later became quite common in the U.S. as well. It may come to a surprise to some that the original aircraft used a Clark-Y airfoil.
If the aircraft were to be used for competition the front cockpit were covered up or removed altogether. It is probably the "Lerche" that served as the basis for the the Goldberg "Jungmann" kit.

PICA never made a Jungmann kit, it was a Jungmeister.
Do not try a DA-50 on a pica Jungmeister. The wings will be shredded as the design of the wing is not optimal.

/Red B.