The Heinkel HE 1 or 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 179 kW (240 hp) Maybach Mb.IVa engine; one test aircraft was powered by a Siddeley Puma engine.
== Specifications == Data from General characteristics Crew: Two (pilot & observer/gunner) Length: 12.65 m (41 ft 6 in) Wingspan: 18 m (59 ft 1 in) Height: 3.85 m (12 ft 8 in) Empty weight: 1,700 kg (3,748 lb) Gross weight: 2,320 kg (5,115 lb) Powerplant: 1 × Maybach Mb IVa 6-cylinder water-cooled inline piston engine, 190 kW (260 hp) Performance
Maximum speed: 160 km/h (99 mph, 86 kn) Service ceiling: 4,000 m (13,000 ft) Time to altitude: 1,000 m (3,300 ft) in 9 minutes Armament 1 × flexible machine gun in rear cockpit
== Operators == Sweden Swedish Navy Swedish Air Force
References
Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 498.