does anyone hear about Casper S.2 ?.
Here is a full Info about it;
Developed by Heinkel 1922, still working for the Caspar-Werken, the S II differed from the S I : The engine was mounted on a steelframe, not directly to the fuselage. A firewall protected the fuselage. The S II was used by the Swedish Navy as S 3 and later designed HE 2 by Heinkel