Heinkel He 115

Heinkel He 115
Name	Heinkel He 115
Type	Floatplane torpedo bomber / reconnaissance
Manufacturer	Heinkel
First flight	1937
Introduced	1939
Primary user	Luftwaffe
Produced	1937–1942
Number built	~120

Heinkel He 115 The Heinkel He 115 was a German twin-engine floatplane used before and during World War II for torpedo bombing, maritime reconnaissance, and air-sea rescue. Designed and built by Heinkel Flugzeugwerke in the late 1930s, it served with the Luftwaffe, export customers such as Royal Norwegian Navy Air Service, and saw action in theaters including the Invasion of Norway (1940), the Battle of the Atlantic, and operations in the Arctic and Baltic Sea. The aircraft combined sea-landing capability with offensive armament and was modified into multiple variants to meet evolving demands.

Development and design

Development began at Heinkel under chief designer Ernst Heinkel's company in response to a 1935 requirement from the Reichsluftfahrtministerium for a long-range maritime aircraft. Drawing on experience from earlier Heinkel types, designers prioritized range to support operations linked to the Kiel Canal, North Sea, and Baltic Sea littorals. The configuration used twin Junkers Jumo 205-series engines or later variants with BMW 132 radial engines to balance endurance and reliability, while twin wooden or metal floats provided stability for operations from fjords like those off Norway and the coasts near Scandinavia and Finland. Prototypes were evaluated against competitors from Blohm & Voss and Dornier, and the He 115 was ordered into production after trials demonstrated adequate payload and seaworthiness for missions supporting the Kriegsmarine and Luftwaffe maritime units.

Operational history

The He 115 entered service with coastal units of the Luftwaffe and played a role in the Norwegian Campaign, conducting torpedo attacks against Allied shipping and supporting amphibious operations connected to the Altmark Incident aftermath. Norwegian operators, including the Royal Norwegian Navy Air Service, used captured and export examples during resistance and evacuation operations after the 1940 invasion. German He 115s performed anti-shipping strikes during the Battle of the Atlantic, operated as reconnaissance platforms over the North Sea and Barents Sea supporting Operation Weserübung-era missions, and conducted air-sea rescue sorties recovering Kriegsmarine sailors. In the northern theater, He 115s supported operations near Murmansk and the Arctic convoys, facing threats from Royal Air Force Coastal Command patrols and Fairey Swordfish torpedo bombers. The aircraft's shallow draft and ability to use fjord anchorages allowed clandestine supply and special-operations insertions linked to Abwehr activities and Special Operations Executive concerns in Scandinavia. Attrition and the increased Allied air superiority, along with improved escort carrier and destroyer defenses in the Atlantic, gradually limited He 115 effectiveness, and surviving units increasingly served secondary roles into 1943–1944.

Variants

Several production and prototype variants adapted the design to different roles and engine fits. Early prototypes used inline diesel engines related to Junkers designs, while production models employed BMW radials. Variants included torpedo-carrying, reconnaissance, and air-sea rescue modifications, plus export batches for nations such as Norway and Sweden. Field conversions added radio and navigation gear from manufacturers like Lorenz and Telefunken for extended reconnaissance, while some units received enhanced defensive armament inspired by lessons from encounters with Royal Navy aircraft and RAF Coastal Command.

Operators

Primary and secondary operators included the Luftwaffe, the Royal Norwegian Navy Air Service, and neutral air arms such as the Swedish Air Force. Captured examples were evaluated by British and Soviet units, and examples saw service with coastal commands aligned with Axis and neutral powers in the Nordic region. Specific coastal aviation wings within the Luftwaffe, including Seeaufklärungsgruppen and Küstenfliegergruppen, operated the type in maritime patrol and torpedo roles.

Technical description

The He 115 was a twin-engine, low-wing floatplane with twin strut-mounted floats and a twin tailplane. Powerplants varied by mark, commonly using two BMW 132 nine-cylinder radial engines or earlier inline diesel prototypes tied to Junkers developments; these drove two-bladed or later three-bladed propellers. Armament typically included a fixed forward-firing machine gun or cannon position synchronized in the nose for bombing runs, dorsal and ventral defensive machine guns in hand-operated turrets or flex mounts, and provisions to carry a single 800–1,000 kg torpedo or a bomb load for anti-shipping strikes. Crew complements of three included pilot, radio/navigator, and gunner/observer with navigation and radio equipment from firms such as Siemens-Schuckert and Telefunken. Construction used mixed metal and wood techniques common to 1930s German designs, with corrosion-resistant treatments for maritime operations, and folding or detachable float bracing to facilitate shipboard or harbor storage in support locations such as Bergen or Kiel.

Surviving aircraft and replicas

Few complete He 115s survived the war. Postwar recovery, museum preservation, and replica projects in Scandinavia and Germany have produced static restorations and airworthy reproductions displayed in institutions associated with Aviation museums in Norway, Sweden, and Germany. Recovered wrecks from fjord and Arctic seabeds have provided airframes for restoration efforts coordinated by veterans' foundations and national museums tied to heritage programs referencing Norwegian War Museum and maritime aviation collections. Replica builds frequently incorporate modern powerplants and avionics sourced from contemporary suppliers to meet airworthiness standards while preserving the He 115's external appearance.

Category:Floatplanes Category:German aircraft 1930–1939