Heinkel HE 1

The Heinkel HE 1 (aka Caspar S 1) was a two-seat, low-wing monoplane floatplane, designed in 1921 by German designer Ernst Heinkel at Caspar-Werke.
The HE 1 was produced under licence in Sweden for the "Marinen" (Swedish Navy) in 1921 as the Svenska S.2. The HE 1 was powered by a Maybach Mb.IVa engine; one test aircraft was powered by a Siddeley Puma engine.