The Heinkel HE 1 (aka Caspar S 1) was a two-seat, low-wing

monoplane A monoplane is a fixed-wing aircraft configuration with a single mainplane, in contrast to a biplane or other types of multiplanes, which have multiple planes. A monoplane has inherently the highest efficiency and lowest drag of any wing confi ...

floatplane, designed in 1921 by

German German(s) may refer to: * Germany (of or related to) ** Germania (historical use) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizens of Germany, see also German nationality law **Ge ...

designer

Ernst Heinkel Dr. Ernst Heinkel (24 January 1888 – 30 January 1958) was a German aircraft designer, manufacturer, '' Wehrwirtschaftsführer'' in Nazi Germany, and member of the Nazi party. His company Heinkel Flugzeugwerke produced the Heinkel He 178, th ...

Caspar-Werke The Caspar-Werke was a German aircraft manufacturer of the early 20th century. It was founded in 1911 by Karl Caspar under the name Zentrale für Aviatik in Fuhlsbüttel. In its early years, the firm built Etrich and Rumpler types under licence, an ...

. The HE 1 was produced under licence in

Sweden Sweden, formally the Kingdom of Sweden,The United Nations Group of Experts on Geographical Names states that the country's formal name is the Kingdom of SwedenUNGEGN World Geographical Names, Sweden./ref> is a Nordic country located on ...

for the '' Marinen'' (Swedish Navy) in 1921 as the Svenska S.2. The HE 1 was powered by a

Maybach Mb.IVa The Maybach Mb IVa was a water-cooled aircraft and airship straight-six engine developed in Germany during World War I by '' Maybach-Motorenbau GmbH'', a subsidiary of Zeppelin. It was one of the world's first series-produced engines designed sp ...

engine An engine or motor is a machine designed to convert one or more forms of energy into mechanical energy. Available energy sources include potential energy (e.g. energy of the Earth's gravitational field as exploited in hydroelectric power ...

; one test aircraft was powered by a

Siddeley Puma The Siddeley Puma was a British aero engine developed towards the end of World War I and produced by Siddeley-Deasy. The first engines left the production lines of Siddeley-Deasy in Coventry in August 1917, production continued until December 1 ...

engine.

Specifications

Operators

; *

Swedish Navy The Swedish Navy ( sv, Svenska marinen) is the naval branch of the Swedish Armed Forces. It is composed of surface and submarine naval units – the Fleet () – as well as marine units, the Amphibious Corps (). In Swedish, vessels o ...

* Swedish Air Force

References

* {{Swedish military aircraft designations Low-wing aircraft 1920s German military reconnaissance aircraft 1920s Swedish military aircraft HE 001 Floatplanes Svenska Aero aircraft Single-engined tractor aircraft Aircraft first flown in 1923