The Heinkel HE 1 was a two seat, low-wing monoplane floatplane, designed in 1921 by German designer Ernst Heinkel at Caspar-Werke. The aircraft was initially produced under licence in Sweden for the Navy of 1921. The HE 1 was powered by a 179 kW Maybach Mb.IVa engine; one test aircraft was powered by a Siddeley Puma engine.
In 1926, an all-metal version was flown as the HE 4 (Swedish designation S 4). It was tested extensively, but no further examples were built.
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- Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. pp. 498.
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