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{{short description|1937 multi-role floatplane family by Heinkel}}
{{short description|1937 multi-role floatplane family by Heinkel}}
{|{{Infobox Aircraft Begin
{{Infobox aircraft
|name = He 115
|name = He 115
|image =Heinkel_He_115_Finland_Air_Force.jpg|caption = Finnish Air Force He 115 N
|image =Heinkel_He_115_Finland_Air_Force.jpg|caption = Finnish Air Force He 115 N
}}{{Infobox Aircraft Type
|type = [[Torpedo bomber]] [[seaplane]]
|type = [[Torpedo bomber]] [[seaplane]]
|manufacturer = [[Heinkel]]
|manufacturer = [[Heinkel]]
|designer =
|designer =
|first flight = August [[1937 in aviation|1937]]
|first_flight = August [[1937 in aviation|1937]]
|introduced = [[1939 in aviation|1939]]
|introduction = [[1939 in aviation|1939]]
|retired =
|retired =
|status = Retired
|status = Retired
|primary user = ''[[Luftwaffe]]''
|primary_user = ''[[Luftwaffe]]''
|more users = [[Royal Norwegian Navy Air Service]]<br />[[Swedish Air Force]]<br />[[Royal Air Force]]<br />[[Finnish Air Force]]
|more_users = [[Royal Norwegian Navy Air Service]]<br /> [[Swedish Air Force]]<br /> [[Royal Air Force]]<br /> [[Finnish Air Force]]
|produced =
|produced =
|number built = 138
|number_built = 138
|unit cost =
|unit cost =
|variants with their own articles =
|variants =
}}
}}
|}


The '''Heinkel He 115''' was an all-metal twin-engined military [[seaplane]] designed and produced by the [[Germany|German]] aircraft manufacturer [[Heinkel]]. Early on its flying history, the He 115 established several new international records for floatplanes.<ref name="Genus 1 p96"/>
The '''Heinkel He 115''' was a three-seat [[World War II]] ''[[Luftwaffe]]'' [[seaplane]]. It was used as a [[torpedo bomber]] and performed general seaplane duties, such as [[reconnaissance]] and [[Naval mine|minelaying]]. The aircraft was powered by two 960&nbsp;PS (947&nbsp;hp, 720&nbsp;kW) [[BMW 132]]K nine-cylinder air-cooled [[radial engine]]s. Some later models could seat four, had different engines or used different weapon arrangements.

The He 115 was developed during the latter half of the 1930s in response to a requirement issued by the German [[Ministry of Aviation (Nazi Germany)|''Reichsluftfahrtministerium'']] (RLM). Heinkel opted to design a three-seat seaplane that could function as a [[torpedo bomber]], [[reconnaissance]] aircraft and [[Naval mine|minelayer]]. The initial model of the aircraft, the first prototype of which performed its [[maiden flight]] in August 1937, was powered by a pair of 960&nbsp;PS (947&nbsp;hp, 720&nbsp;kW) [[BMW 132]]K nine-cylinder air-cooled [[radial engine]]s. Subsequent models varied in several respects, such as being equipped with different engines or alternative armament arrangements, increased fuel capacity or payload, and some He 115s could even accommodate an additional crew member.

The He 115 saw active combat with multiple operators, particularly during its service with the ''[[Luftwaffe]]'' during the [[Second World War]]. Early on in the conflict, German He 115s frequently deployed mines within British waters. It proved itself to be a capable anti-shipping platform, particularly against [[Arctic convoys of World War II|Arctic supply convoys]]. Other nations flew the He 115, the majority being [[Scandinavia]]n. The [[Royal Norwegian Navy Air Service]] operated a number that flew missions against [[Operation Weserübung|the German invasion of Norway]]; several survivors escaped the occupation by flying to the UK, where they continued to be flown against the Germans until they were lost. By the twenty-first century, while a few airframes have survived, none are currently on display to the public and none are flightworthy.


==Development and design==
==Development and design==
In 1935, the German [[Reich Air Ministry]] (''RLM, Reichsluftfahrtministerium'') produced a requirement for a twin engined general purpose [[floatplane]], suitable for patrol and for anti-shipping strikes with bombs and [[torpedo]]es. Proposals were received from Heinkel Flugzeugwerke and from the [[Blohm & Voss]] aircraft subsidiary [[Hamburger Flugzeugbau]]. On 1 November 1935, orders were placed with Heinkel and Hamburger Flugzeugbau for three [[prototype]]s each of their prospective designs, the '''He 115''' and the [[Blohm & Voss Ha 140|Ha 140]].<ref name="Genus 1 p97">''Air International'' February 1987, p.97.</ref><ref name="Donald German p108">Donald 1994, p.108.</ref>
The origins of the He 115 can be traced back to 1935 and the issuing of a requirement by the German [[Ministry of Aviation (Nazi Germany)|''Reichsluftfahrtministerium'']] (RLM) that called for a twin engined general purpose [[floatplane]], suitable for maritime patrol and anti-shipping strikes with both bombs and [[torpedo]]es. Numerous aircraft manufacturers responded with their own proposals, including Heinkel Flugzeugwerke and the [[Blohm & Voss]] aircraft subsidiary [[Hamburger Flugzeugbau]]. On 1 November 1935, orders were placed with both Heinkel and Hamburger Flugzeugbau to produce three [[prototype]]s of their prospective designs, designated the ''He 115'' and the [[Blohm & Voss Ha 140|Ha 140]] respectively.<ref name="Genus 1 p97">''Air International'' February 1987, p. 97.</ref><ref name="Donald German p108">Donald 1994, p. 108.</ref>


In terms of its general configuration, the He 115 was an all-metal mid-wing [[monoplane]] with a [[monocoque]] fuselage.<ref name = "smithkay 269"/> It was equipped with a pair of [[Float (nautical)|floats]], each of which was attached to the underside of the engine [[nacelle]]s via a large [[strut]]. The twin-[[Spar (aeronautics)|spar]] wing was built in three sections.<ref name = "smithkay 269"/> It featured a stepped cockpit along with a rear-facing observation compartment.<ref name = "smithkay 26970">Smith and Kay 1972, pp. 269-270.</ref> Initially, the He 115's armament consisted of two 7.92&nbsp;mm (.312&nbsp;in) [[MG 15 machine gun]]s, one in the nose and one in the dorsal position.<ref name="Genus 1 p97"/> On later-build He 115s, the typical armament fitted included a fixed forward-firing 15&nbsp;mm or 20&nbsp;mm [[MG 151 cannon]] and two rearward-firing 7.92&nbsp;mm (.312&nbsp;in) [[MG 17 machine gun]]s in the engine nacelles.<ref name="Genus 1 p101">''Air International'' February 1987, p. 101.</ref><ref name="Genus 2 p155">''Air International'' March 1987, p. 155.</ref> Furthermore, some variants carried [[LTF 5 torpedo|LTF 5]] or [[LTF 6b torpedo]]es and [[SD 500 bomb|SD 500]] {{convert|500|kg|lb|abbr=on}} or [[SC 250 bomb|SC 250]] {{convert|250|kg|lb|abbr=on}} bombs, while others carried [[LMB III mine|LMB III]] or [[LMA mine]]s.
The first prototype Heinkel flew in August 1937, testing was successful and the He 115 design was selected over the Ha 140 early in 1938, leading to an order for another prototype and 10 pre-production aircraft.<ref name="Genus 1 p97"/> The first prototype was used to set a series of international records for floatplanes over {{convert|1000|km|mi|abbr=on}} and {{convert|2000|km|mi|abbr=on}} closed circuits at a speed of {{convert|328|km/h|mph|abbr=on}}.<ref name="Genus 1 p96">''Air International'' February 1987, p.96.</ref>


During August 1937, the first prototype He 115 performed its [[maiden flight]].<ref name = "smithkay 270">Smith and Kay 1972, p. 270.</ref> Flight testing went relatively smoothly, the type's flight characteristics proving to be quite favourable.<ref name = "smithkay 269"/> In early 1938, the He 115 was selected over the rival Ha 140, thus securing a second order for another prototype and 10 pre-production aircraft.<ref name="Genus 1 p97"/> According to aviation historian Hans Amtmann, Hamburger Flugzeugbau did not have enough spare manufacturing capacity for series production and declined the order, leading to Heinkel's selection instead.<ref>Hans Amtmann; "Blohm & Voss Remembered", ''Aeroplane Monthly'', February 1988, pp. 25-26.</ref> During March of that year, the first prototype was used to establish a series of international records for floatplanes over {{convert|1000|km|mi|abbr=on}} and {{convert|2000|km|mi|abbr=on}} closed circuits at a speed of {{convert|328|km/h|mph|abbr=on}}.<ref name="Genus 1 p96">''Air International'' February 1987, p. 96.</ref> Prior to these records being set, the prototype had been modified to achieve greater aerodynamic performance, such as the deletion of the angular glazed nose and the rear compartment, which were replaced by [[Aircraft fairing|fairing]]s.<ref name = "smithkay 270"/>
Armament initially consisted of two 7.92&nbsp;mm (.312&nbsp;in) [[MG 15 machine gun]]s, one in the nose and one in the dorsal position.<ref name="Genus 1 p97"/> Later He 115s were fitted with a fixed forward-firing 15&nbsp;mm or 20&nbsp;mm [[MG 151 cannon]] and two rearward-firing 7.92&nbsp;mm (.312&nbsp;in) [[MG 17 machine gun]]s in the engine nacelles.<ref name="Genus 1 p101">''Air International'' February 1987, p.101.</ref><ref name="Genus 2 p155">''Air International'' March 1987, p.155.</ref> He 115 variants carried [[LTF 5 torpedo|LTF 5]] or [[LTF 6b torpedo]]es and [[SD 500 bomb|SD 500]] {{convert|500|kg|lb|abbr=on}} or [[SC 250 bomb|SC 250]] {{convert|250|kg|lb|abbr=on}} bombs. Some also carried [[LMB III mine|LMB III]] or [[LMA mine]]s.

The third and fourth prototypes including a continuous glazed canopy (between the windshield and the rear position) and angled [[Bracing (aeronautics)|bracing]] struts between the vertical struts attached to the floats respectively.<ref name = "smithkay 270"/> In 1937, ten pre-production He 115s were completed; deliveries of production standard aircraft to the ''[[Luftwaffe]]'' commenced one year later. The He 115A-3 was the first variant to be produced in quantity, it differed from earlier models by having a revised [[bomb bay]] and radio apparatus. During 1939, the improved HE 115B-1, which featured a more than 50 percent increase in fuel capacity, was introduced.<ref name = "smithkay 270"/>

While production came to an end during the first half of the [[Second World War]], the He 115 was highly regarded, to the extent that production was resumed in 1943, despite an increasingly large proportion of German's aircraft manufacturing capacity being allocated to defensive [[fighter aircraft]] instead.<ref name = "smithkay 269734">Smith and Kay 1972, pp. 269, 273-274.</ref>


==Operational history==
==Operational history==
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[[File:Heinkel He 115 plane on crane c1940.jpg|thumb|A German Heinkel He 115B of 1./Küstenfliegergruppe 206 on a crane.]]
[[File:Heinkel He 115 plane on crane c1940.jpg|thumb|A German Heinkel He 115B of 1./Küstenfliegergruppe 206 on a crane.]]
At the outbreak of the war, the He 115 was used for dropping parachute mines in British waters, normally aiming for narrow passages close to busy ports on the English south coast; the [[River Thames]] was also a prime target.
Throughout the Second World War, the primary mission of the Luftwaffe's He 115s was to conduct minelaying, typically during night time to lower the likelihood of interception.<ref name = "smithkay 269">Smith and Kay 1972, p. 269.</ref> Following the first such mission on 20 November 1939, the He 115 was frequently used for dropping (typically via [[parachute]]) [[magnetic mine]]s in British waters, normally aiming for narrow passages close to busy ports on the English south coast; the [[River Thames]] was also a prime target. These mining efforts supplemented the efforts of the ''[[Kriegsmarine]]''.<ref name = "smithkay 2712">Smith and Kay 1972, pp. 271-272.</ref> The island of [[Sylt]] was used as a base for He 115s performing these missions; in response, it became a target for [[Strategic_bombing_during_World_War_II#Allied_bombing_of_Germany|Allied bombing]] missions.<ref name = "smithkay 272">Smith and Kay 1972, p. 272.</ref>

The aircraft had its finest moment on anti-shipping operations against [[Arctic convoys of World War II|Arctic convoys]] from bases in northern Norway. Because the first convoys lacked air cover, the slow and lightly armed He 115 was less vulnerable than near the English coast. With the appearance of [[aircraft carrier|carriers]] and [[escort aircraft carrier|escort carriers]], coupled with new Soviet [[heavy fighter]]s like the [[Petlyakov Pe-3]]bis, ''Luftwaffe'' [[air superiority]] over the convoys was challenged and losses increased.
Perhaps the most effective missions performed by the He 115 were its anti-shipping operations against [[Arctic convoys of World War II|Arctic convoys]], for which it operated out of bases in [[German occupation of Norway|occupied northern Norway]]. Due to early convoys lacking any air cover, the slow and lightly-armed He 115 was less vulnerable during these attacks than it was when operating near to the English coast. Following the appearance of [[aircraft carrier|carriers]] and [[escort aircraft carrier|escort carriers]], coupled with the arrival of new Soviet [[heavy fighter]]s like the [[Petlyakov Pe-3]]bis, ''Luftwaffe'' [[air superiority]] over the convoys was challenged and losses increased.{{citation needed|date=September 2024}}


[[File:Heinkel He 115 shot down of Norway c1943.jpg|thumb|left|He 115 shot down by [[de Havilland Mosquito]].]]
[[File:Heinkel He 115 shot down of Norway c1943.jpg|thumb|left|He 115 shot down by [[de Havilland Mosquito]].]]
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[[File:Heinkel He 115A-2 (He 115N) F.60 of the Royal Norwegian Navy Air Service.jpg|thumb|Norwegian He 115Ns in 1939–1940.]]
[[File:Heinkel He 115A-2 (He 115N) F.60 of the Royal Norwegian Navy Air Service.jpg|thumb|Norwegian He 115Ns in 1939–1940.]]
In response to the rising tensions in Europe, the [[Norwegian Ministry of Defence]] had ordered six He 115Ns for the [[Royal Norwegian Navy Air Service]] (RNoNAS) on 28 August 1939 and the aircraft were delivered from 14 July – 13 November 1939.<ref name="Norw. 115">Luftwaffe.no: [http://www.luftwaffe.no/SIG/Artikler/115.html Heinkel He 115 in Norway] {{webarchive|url=https://web.archive.org/web/20070928043156/http://www.luftwaffe.no/SIG/Artikler/115.html |date=2007-09-28 }}</ref> The He 115N order was intended to replace the RNoNAS fleet of 1920s vintage [[Douglas DT]] torpedo bombers and the obsolescent [[Marinens Flyvebaatfabrikk M.F.11]], which was the mainstay of the RNoNAS in 1940.<ref>Hafsten 2003: 87–90</ref> The Norwegians signed another order of six He 115Ns in December 1939, with delivery expected in March/April 1940 but this was forestalled by [[Operation Weserübung]], the German invasion of Norway of 9 April 1940.<ref name="Norw. 115"/> At the outbreak of hostilities, the RNoNAS had six He 115Ns in service (F.50, F.52, F.54, F.56, F.58 and F.60) spread along the coast from the naval air stations at [[Sola Air Station|Sola]] and [[Flatøy]] in the south to the one at [[Skattøra]] Naval Air Station outside [[Tromsø]] in the north. At the beginning of the German invasion, the aircraft at the seaplane base at [[Hafrsfjord]] near [[Stavanger]] (F.60) was captured by the Germans, but two ''Luftwaffe'' He 115s (given the codes F.62 and F.64 in Norwegian service) were seized by an improvised [[militia]] unit of Norwegian [[Rifleman|riflemen]] at [[Ørnes]] in [[Glomfjord]], [[Nordland]] and by [[police]] officers at [[Brønnøysund]], Nordland. The two aircraft were seized after they ran out of fuel and had to make emergency landings on 10 April. Manned by Norwegian aircrews, they served against their former owners for the duration of the campaign.
In response to the rising tensions in Europe, the [[Norwegian Ministry of Defence]] had ordered six He 115Ns for the [[Royal Norwegian Navy Air Service]] (RNoNAS) on 28 August 1939 and the aircraft were delivered from 14 July – 13 November 1939.<ref name="Norw. 115">Luftwaffe.no: [http://www.luftwaffe.no/SIG/Artikler/115.html Heinkel He 115 in Norway] {{webarchive|url=https://web.archive.org/web/20070928043156/http://www.luftwaffe.no/SIG/Artikler/115.html |date=28 September 2007 }}</ref> The He 115N order was intended to replace the RNoNAS fleet of 1920s vintage [[Douglas DT]] torpedo bombers and the obsolescent [[Marinens Flyvebaatfabrikk M.F.11]], which was the mainstay of the RNoNAS in 1940.<ref>Hafsten 2003, pp. 87–90.</ref> The Norwegians signed another order of six He 115Ns in December 1939, with delivery expected in March/April 1940 but this was forestalled by [[Operation Weserübung]], the German invasion of Norway of 9 April 1940.<ref name="Norw. 115"/> At the outbreak of hostilities, the RNoNAS had six He 115Ns in service (F.50, F.52, F.54, F.56, F.58 and F.60) spread along the coast from the naval air stations at [[Sola Air Station|Sola]] and [[Flatøy]] in the south to the one at [[Skattøra]] Naval Air Station outside [[Tromsø]] in the north. At the beginning of the German invasion, the aircraft at the seaplane base at [[Hafrsfjord]] near [[Stavanger]] (F.60) was captured by the Germans, but two ''Luftwaffe'' He 115s (given the codes F.62 and F.64 in Norwegian service) were seized by an improvised [[militia]] unit of Norwegian [[Rifleman|riflemen]] at [[Ørnes]] in [[Glomfjord]], [[Nordland]] and by [[police]] officers at [[Brønnøysund]], Nordland. The two aircraft were seized after they ran out of fuel and had to make emergency landings on 10 April. Manned by Norwegian aircrews, they served against their former owners for the duration of the campaign.<ref name = "smithkay 272"/>


Seven Norwegian He 115s, five of them He 115Ns, were employed against German and German-controlled ships (see: [[HNoMS Uller (1876-1940)|HNoMS ''Uller'']]), as well as providing [[Close air support|ground support]] to the [[Norwegian Army]] offensive on the [[Battle of Narvik#Land battle|Narvik Front]]. On 14 April 1940, three Norwegian He 115s made a successful attack on German Ju 52s at [[Gullesfjordbotn]]. Four of the Norwegian aircraft (F.52, F.56, F.58 and F.64) made the journey to the [[United Kingdom]] shortly before the 10 June 1940 surrender, a fifth (F.50) escaping to [[Finland]], landing on Lake Salmijärvi in [[Pechengsky District|Petsamo]].<ref>FAF in Color: [http://www.sci.fi/~ambush/faf/fafincolor.html Finnish Air Force Aircraft: Heinkel He 115]{{dead link|date=March 2017 |bot=InternetArchiveBot |fix-attempted=yes}}</ref> A sixth He 115 (F.54) also tried to make the journey to Britain but was lost over the [[North Sea]]. The last of the Norwegian He 115s, F.62 (one of the two captured German aircraft), was unserviceable at the time of the evacuation and was abandoned at Skattøra, later being repaired and flown by the Germans.
Seven Norwegian He 115s, five of them He 115Ns, were employed against German and German-controlled ships (see: [[HNoMS Uller (1876-1940)|HNoMS ''Uller'']]), as well as providing [[Close air support|ground support]] to the [[Norwegian Army]] offensive on the [[Battle of Narvik#Land battle|Narvik Front]]. On 14 April 1940, three Norwegian He 115s made a successful attack on German Ju 52s at [[Gullesfjordbotn]]. Four of the Norwegian aircraft (F.52, F.56, F.58 and F.64) made the journey to the [[United Kingdom]] shortly before the 10 June 1940 surrender,<ref name = "smithkay 272"/> a fifth (F.50) escaping to [[Finland]], landing on Lake Salmijärvi in [[Pechengsky District|Petsamo]].<ref>FAF in Color: [http://www.sci.fi/~ambush/faf/fafincolor.html Finnish Air Force Aircraft: Heinkel He 115]{{dead link|date=March 2017 |bot=InternetArchiveBot |fix-attempted=yes}}</ref> A sixth He 115 (F.54) also tried to make the journey to Britain but was lost over the [[North Sea]]. The last of the Norwegian He 115s, F.62 (one of the two captured German aircraft), was unserviceable at the time of the evacuation and was abandoned at Skattøra, later being repaired and flown by the Germans.


===Royal Air Force===
===Royal Air Force===


The four escaped aircraft were reformed into the Norwegian [[Helensburgh]] Group under [[Commander]] Bugge.<ref name = "smithkay 272"/> The exiled Norwegian [[Cabinet Nygaardsvold]] made plans shortly after arriving in Britain to use the four He 115s to perform [[Pamphlet|leaflet]] dropping missions over Norway. This leaflet mission was to deliver a declaration to the [[Occupation of Norway by Nazi Germany|Norwegian people]], stating the Norwegian authorities were re-established in the UK and rejected any Nazi German overtures for a German–Norwegian peace deal. All four Norwegian He 115s were ordered from Helensburgh to Scapa Flow on 3 July 1940 to carry out the mission, although one had to return to Helensburgh due to engine problems. The three He 115s assembled at [[Scapa Flow]] were ordered to fly to Norway and drop the declaration over the cities of [[Oslo]], [[Bergen]] and [[Trondheim]]. Shortly before the mission was to get under way, the British [[Air Ministry]] intervened and stopped the expedition, insisting that such an undertaking would be suicidal to attempt with the slow flying He 115s. Three days later, the aircraft returned to Helensburgh.<ref>Hafsten 1991, p. 297.</ref>
The four escaped aircraft were reformed into the Norwegian [[Helensburgh]] Group under [[Commander]] Bugge.
The exiled Norwegian [[Cabinet Nygaardsvold]] made plans soon after arriving in Britain to use the four He 115 aircraft to perform [[Pamphlet|leaflet]] dropping missions over Norway. The leaflet mission was to deliver a declaration to the [[Occupation of Norway by Nazi Germany|Norwegian people]], stating the Norwegian authorities were re-established in the UK and rejected any Nazi German overtures for a German–Norwegian peace deal. All four Norwegian He 115s were ordered from Helensburgh to Scapa Flow on 3 July 1940 to carry out the mission, although one had to return to Helensburgh due to engine problems. The three He 115s assembled at [[Scapa Flow]] were ordered to fly to Norway and drop the declaration over the cities of [[Oslo]], [[Bergen]] and [[Trondheim]]. Shortly before the mission was to get under way the British [[Air Ministry]] intervened and stopped the expedition, insisting that such an undertaking would be suicidal to attempt with the slow flying He 115s. Three days later, the aircraft returned to Helensburgh.<ref>Hafsten 1991, p. 297</ref>


Three of the Norwegian He 115s (F.56, F.58 and F.64) were subsequently used in covert operations off Norway and in the [[Mediterranean]] Sea with Norwegian crews. In British service, the three received new [[United Kingdom military aircraft serials|serial numbers]], ''BV184'', ''BV185'' and ''BV187''.<ref name="Norw. 115"/> ''BV184'' was attacked and damaged by two Polish [[Supermarine Spitfire|Spitfire]] fighters over the [[Bay of Biscay]] in the spring of 1942, while co-operating with French fishing boats and later lost in a refuelling fire in the UK.<ref>Berg 1997: 93</ref><ref name="Norw. 115"/> ''BV185'' was destroyed in an Italian air raid on [[Kalafrana]], [[Malta]] after flying just one clandestine operation to North Africa.<ref name="Norw. 115"/> ''BV187'' flew several missions on the North African coast from its base in Malta before being destroyed by two German Bf 109s.<ref name="Norw. 115"/>
Three of the Norwegian He 115s (F.56, F.58 and F.64) were subsequently used in covert operations off Norway and in the [[Mediterranean]] Sea with Norwegian crews. In British service, the three received new [[United Kingdom military aircraft serials|serial numbers]], ''BV184'', ''BV185'' and ''BV187''.<ref name="Norw. 115"/> ''BV184'' was attacked and damaged by two Polish [[Supermarine Spitfire|Spitfire]] fighters over the [[Bay of Biscay]] in the spring of 1942, while co-operating with French fishing boats and later lost in a refuelling fire in the UK.<ref>Berg 1997, p. 93.</ref><ref name="Norw. 115"/> ''BV185'' was destroyed in an Italian air raid on [[Kalafrana]], [[Malta]] after flying just one clandestine operation to North Africa.<ref name="Norw. 115"/><ref name = "smithkay 272"/> ''BV187'' flew several missions on the North African coast from its base in Malta before being destroyed by a pair of German Bf 109s.<ref name="Norw. 115"/>


===Finnish Air Force===
===Finnish Air Force===


[[File:He115-hoytiainen.jpg|thumb|Heinkel He 115A of LeLv 15 on lake Höytiäinen. August 1941.]]
[[File:He115-hoytiainen.jpg|thumb|Heinkel He 115A of LeLv 15 on lake Höytiäinen. August 1941.]]
On 8 June 1940, the day after Norwegian forces were ordered to cease hostilities, one He 115 (F.50, deemed technically unfit to be flown to UK), was flown to Finland posing as a civilian aircraft LN-MAB. The float-plane was interned but the pilot, experienced line captain and naval lieutenant Helge Dahl and crew were free to leave Finland. From Summer 1941 it was used by the [[No. 14 Squadron, Finnish Air Force|LLv.14]] of the [[Finnish Air Force]] code HE-115 and named "Jenny", to ferry [[Sissi (Finnish guerrilla)|''Sissi'']] troops behind Soviet lines. In this role, it proved valuable in a terrain with numerous secluded lakes. It served in this role until ambushed in [[East Karelia]] on 4 July 1943. ''Jenny'' took off but soon had to ditch and the crew was taken prisoner. Two days later the floating HE-115 was strafed by Finnish Morane-Saulnier MS406 fighters. There are reports that the Soviets salvaged the wreck for evaluation.<ref name="Norw. 115"/> Two Luftwaffe He 115 C were borrowed for similar operations in 1943–44 and operated with German markings by Finnish crew. One was returned in 1944 but the other was surrendered to the Soviets after armistice.
On 8 June 1940, the day after Norwegian forces were ordered to cease hostilities, one He 115 (F.50, deemed technically unfit to be flown to the UK), was flown to Finland posing as a civilian aircraft LN-MAB. The floatplane was [[internment|interned]] but the pilot, experienced line captain and naval lieutenant Helge Dahl and crew were free to leave Finland. From Summer 1941, it was used by the [[No. 14 Squadron, Finnish Air Force|LLv.14]] of the [[Finnish Air Force]] code HE-115 and named "Jenny", to ferry [[Sissi (Finnish guerrilla)|''Sissi'']] troops behind Soviet lines. In this role, it proved valuable in a terrain with numerous secluded lakes. It served in this role until ambushed in [[East Karelia]] on 4 July 1943. ''Jenny'' took off but soon had to ditch and the crew was taken prisoner. Two days later the floating HE-115 was strafed by Finnish [[Morane-Saulnier MS.406]] fighters. There are reports that the Soviets salvaged the wreck for evaluation.<ref name="Norw. 115"/> A pair of Luftwaffe He 115 C were borrowed for similar operations in 1943–44 and operated with German markings by Finnish crew. One was returned in 1944 but the other was surrendered to the Soviets after the signing of the [[Moscow Armistice]].{{citation needed|date=September 2024}}


===Swedish Air Force===
===Swedish Air Force===

The [[Swedish Air Force]] operated 12 He 115A-2s under the local designation '''T 2''', with Air Force numbers 101–112. Another six aircraft were ordered but never delivered due to the outbreak of World War II. They were sturdy and well liked by their crews and were not taken out of use until 1952. The Swedish T 2s were kept on duty throughout World War II and made a valuable contribution to protecting and enforcing Swedish neutrality. The T 2s replaced the outdated '''T 1s''' (Heinkel HD 16s) as torpedo bombers and also served as regular bombers, for smoke screening and for long-range reconnaissance missions. Five of the 12 T 2s were lost in accidents during their service with the Swedish Air Force.<ref>Avrosys.nu: [http://www.avrosys.nu/aircraft/Torped/192T2.htm T 2 - Heinkel He 115 (1939-1952)] {{webarchive|url=https://web.archive.org/web/20070205042729/http://www.avrosys.nu/aircraft/Torped/192T2.htm |date=2007-02-05 }}</ref>
The [[Swedish Air Force]] operated 12 He 115A-2s under the local designation '''T 2''', with Air Force numbers 101–112. Another six aircraft were ordered but never delivered due to the outbreak of the Second World War. They were sturdy and well liked by their crews and were not taken out of use until 1952. The Swedish T 2s were kept on duty throughout the Second World War and made a valuable contribution to protecting and enforcing [[Swedish neutrality]]. The T 2s replaced the outdated '''T 1s''' ([[Heinkel HD 16]]s) as torpedo bombers and also served as regular bombers, for smoke screening and for long-range reconnaissance missions. Five of the 12 T 2s were lost in accidents during their service with the Swedish Air Force.<ref>Avrosys.nu: [http://www.avrosys.nu/aircraft/Torped/192T2.htm T 2 - Heinkel He 115 (1939-1952)] {{webarchive|url=https://web.archive.org/web/20070205042729/http://www.avrosys.nu/aircraft/Torped/192T2.htm |date=5 February 2007 }}</ref>


==Variants==
==Variants==
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* '''He 115 V2''' November 1937, similar to V1
* '''He 115 V2''' November 1937, similar to V1
* '''He 115 V3''' March 1938, introduced glassed [[cockpit]], which became standard
* '''He 115 V3''' March 1938, introduced glassed [[cockpit]], which became standard
* '''He 115 V4''' May 1938, production [[prototype]], introduced struts in place of wires between [[fuselage]] and [[Float (nautical)|floats]]
* '''He 115 V4''' May 1938, production [[prototype]], introduced struts in place of wires between the fuselage and floats
* '''He 115 V5''' 1939
* '''He 115 V5''' 1939


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;{{UK}}
;{{UK}}
* [[Royal Air Force]]
* [[Royal Air Force]]

==Surviving aircraft==
[[File:Heinkel He115 -2398 8L+FH- (42451474802).jpg|thumb|Heinkel He 115 in restoration at the [[Flyhistorisk Museum, Sola]].]]
* He 115 A-2 Werknr. 3043? Recovered from Russia, now in storage with private owner in France.{{citation needed|date=September 2024}}
* He 115 B/C Werknr. 2398 sunk to the bottom of a fjord on 26 December 1942<ref>{{cite web |last1=Minion |first1=Main |title=WW2 German seaplane to be salvaged in Norway |url=https://old.xray-mag.com/content/ww2-german-seaplane-be-salvaged-norway |website=X-Ray Mag |access-date=18 January 2024 |language=en |date=24 April 2012}}</ref> and was recovered from [[Hafrsfjord]] in Norway on 2 June 2012. It was part of 1 Staffel, Seefernaufklärungsgruppe 906 (No. 1 Squadron, 906 Maritime Reconnaissance Group), known until February 1941 as Küstenfliegergruppe 906 (906 Coastal Aviation Group), [[Luftflotte 5]]. In July 2012, the aircraft was in storage awaiting restoration at the [[Flyhistorisk Museum, Sola]] near [[Stavanger]].<ref name=Aeroplane0812>{{cite magazine |title=Heinkel 115 recovered in Norway |magazine=Aeroplane |page=6 |publisher=Kelsey Publishing |location=Cudham, UK |issue=August 2012 |language=en |issn=0143-7240}}</ref>
* The wreck of a He 115 was located at the bottom of the lake Limingen in Nord-Trøndelag, Norway in 2013.<ref>{{cite web |url = http://www.nrk.no/trondelag/1.11216620 |title = Tysk fly funnet på bunnen av innsjø |first1 = Torill |last1 = Aamodt |first2 = Solvår |last2 = Flatås |website = nrk.no |date = 2 September 2013 |language = no}}</ref>


==Specifications (He 115 B-1)==
==Specifications (He 115 B-1)==
[[File:Heinkel He 115 profile.png|thumb|He 115]]
[[File:Heinkel He 115 profile.png|thumb|He 115]]
{{Aircraft specs
{{Aircraft specs
|ref=Fighters and Bombers of World War II<ref name="Munson 1983, p. 197">Munson 1983, p. 197.</ref>
|ref= ''Fighters and Bombers of World War II''<ref name="Munson 1983, p. 197">Munson 1983, p. 197.</ref>
|prime units?=met
|prime units?= met
<!--
<!--
General characteristics
General characteristics
-->
-->
|crew=3
|crew= three
|length m=17.3
|length m= 17.3
|length note=
|length note=
|span m=22.28
|span m= 22.28
|span note=
|span note=
|height m=6.6
|height m= 6.6
|height note=
|height note=
|wing area sqm=87.5
|wing area sqm= 87.5
|wing area note=
|wing area note=
|aspect ratio=<!-- sailplanes -->
|aspect ratio=<!-- sailplanes -->
|airfoil='''root:''' [[NACA airfoil|NACA 2221]]<ref name="Selig">{{cite web |last1=Lednicer |first1=David |title=The Incomplete Guide to Airfoil Usage |url=https://m-selig.ae.illinois.edu/ads/aircraft.html |website=m-selig.ae.illinois.edu |access-date=16 April 2019}}</ref>
|airfoil= '''root:''' [[NACA airfoil|NACA 2221]]<ref name="Selig">{{cite web |last1=Lednicer |first1=David |title=The Incomplete Guide to Airfoil Usage |url=https://m-selig.ae.illinois.edu/ads/aircraft.html |website=m-selig.ae.illinois.edu |access-date=16 April 2019}}</ref>
|empty weight kg=5290
|empty weight kg= 5,290
|empty weight note=
|empty weight note=
|gross weight kg=10400
|gross weight kg= 10,400
|gross weight note=
|gross weight note=
|max takeoff weight kg=
|max takeoff weight kg=
Line 139: Line 152:
Powerplant
Powerplant
-->
-->
|eng1 number=2
|eng1 number= 2
|eng1 name=[[BMW 132K]]
|eng1 name= [[BMW 132K]]
|eng1 type=9-cylinder air-cooled radial piston engines
|eng1 type= nine-cylinder air-cooled radial piston engines
|eng1 kw=<!-- prop engines -->
|eng1 kw=<!-- prop engines -->
|eng1 hp=<!-- prop engines -->
|eng1 hp=<!-- prop engines -->
Line 147: Line 160:
|eng1 kn=<!-- jet/rocket engines -->
|eng1 kn=<!-- jet/rocket engines -->
|eng1 lbf=<!-- jet/rocket engines -->
|eng1 lbf=<!-- jet/rocket engines -->
|eng1 note={{cvt|960|PS|hp kW}}
|eng1 note= {{cvt|960|PS|hp kW}}


|prop blade number=3
|prop blade number= 3
|prop name=variable-pitch propellers
|prop name= variable-pitch propellers
|prop dia m=<!-- propeller aircraft -->
|prop dia m=<!-- propeller aircraft -->
|prop dia note=
|prop dia note=
Line 156: Line 169:
Performance
Performance
-->
-->
|max speed kmh=327
|max speed kmh= 327
|max speed note=
|max speed note=
|max speed mach=<!-- supersonic aircraft -->
|max speed mach=<!-- supersonic aircraft -->
Line 169: Line 182:
|range km=
|range km=
|range note=
|range note=
|combat range km=2100
|combat range km= 2,100
|combat range note=
|combat range note=
|ferry range km=
|ferry range km=
|ferry range note=
|ferry range note=
|endurance=<!-- if range unknown -->
|endurance=<!-- if range unknown -->
|ceiling m=5200
|ceiling m= 5,200
|ceiling note=
|ceiling note=
|g limits=<!-- aerobatic -->
|g limits=<!-- aerobatic -->
Line 181: Line 194:
|climb rate note=
|climb rate note=
|time to altitude=
|time to altitude=
|wing loading kg/m2=103.8
|wing loading kg/m2= 103.8
|wing loading note=
|wing loading note=
|fuel consumption kg/km=
|fuel consumption kg/km=
Line 197: Line 210:
|avionics=
|avionics=
}}
}}

==Surviving aircraft==
[[File:Heinkel He115 -2398 8L+FH- (42451474802).jpg|thumb|Heinkel He 115 in restoration at the [[Flyhistorisk Museum, Sola]].]]
* He 115 A-2 Werknr. 3043? Recovered from Russia, now in storage with private owner in France
* He 115 B/C Werknr. 2398 was recovered from [[Hafrsfjord]] in Norway on 2 June 2012. It was part of 1 Staffel, Seefernaufklärungsgruppe 906 (No. 1 Squadron, 906 Maritime Reconnaissance Group), known until February 1941 as Küstenfliegergruppe 906 (906 Coastal Aviation Group), [[Luftflotte 5]]. In July 2012 the aircraft was in storage awaiting restoration at the [[Flyhistorisk Museum, Sola]] near [[Stavanger]].<ref name=Aeroplane0812>{{cite magazine |title=Heinkel 115 recovered in Norway |magazine=Aeroplane |page=6 |publisher=Kelsey Publishing |location=Cudham |issue=August 2012 |issn=0143-7240}}</ref>
* The wreck of a He 115 was located at the bottom of the lake Limingen in Nord-Trøndelag, Norway in 2013.<ref>http://www.nrk.no/trondelag/1.11216620, (in Norwegian)</ref>


==See also==
==See also==
{{aircontent
{{aircontent
|similar aircraft=*[[Fiat RS.14]]
|similar aircraft=
* [[Fiat RS.14]]
* [[CANT Z.506]]
* [[CANT Z.506]]
* [[Consolidated PBY Catalina]]
* [[Consolidated PBY Catalina]]
Line 212: Line 220:
* [[Hall XPTBH]]
* [[Hall XPTBH]]
* [[Fokker T.VIII]]
* [[Fokker T.VIII]]
|sequence=
[[Heinkel He 112|He 112]] -
[[Heinkel He 113|He 113]] -
[[Heinkel He 114|He 114]] -
'''He 115''' -
[[Heinkel He 116|He 116]] -
[[Henschel Hs 117|Hs 117]] -
[[Heinkel He 118|He 118]]
|see also=
|see also=
|lists=
|lists=
Line 231: Line 231:
==References==
==References==


===Notes===
===Citations===
{{Reflist}}
{{Reflist}}


===Bibliography===
===Bibliography===
{{refbegin}}
{{refbegin}}
* {{cite book |title=I skjærgården og på havet – Marinens krig 8. april 1940 – 8. mai 1945 |last=Berg |first=Ole F. |year=1997 |publisher=Marinens krigsveteranforening |location=Oslo |isbn=82-993545-2-8 |language= no}}
* {{cite book |last=Berg |first=Ole F. |title=I skjærgården og på havet – Marinens krig 8. april 1940 – 8. mai 1945 |year=1997 |publisher=Marinens krigsveteranforening |location=Oslo, Norway |isbn=82-993545-2-8 |language= no}}
* Donald, David (ed). ''Warplanes of the Luftwaffe''. London:Aerospace Publishing, 1994. {{ISBN|1-874023-56-5}}.
* {{cite book |editor-last=Donald |editor-first=David |title = Warplanes of the Luftwaffe |location = London, UK |publisher = Aerospace Publishing |date = 1994 |language=en |isbn = 1-874023-56-5}}
* Ede, Paul and Moeng, Soph (gen. editors) ''The Encyclopedia of World Aircraft'' {{ISBN|1-85605-705-4}}
* {{cite book |editor-last1= Eden |editor-first1= Paul |editor-last2= Moeng |editor-first2= Soph |title = The Encyclopedia of World Aircraft |publisher = Silverdale Books |date = 2002 |language=en |isbn = 1-85605-705-4}}
* {{cite book |last=Hafsten |first=Bjørn |first2=Tom |last2=Arheim |title=Marinens Flygevåpen 1912–1944 |year=2003 |publisher=TankeStreken AS |location=Oslo |isbn=82-993535-1-3 |language=no }}
* {{cite book |last1=Hafsten |first1=Bjørn |first2=Tom |last2=Arheim |title=Marinens Flygevåpen 1912–1944 |year=2003 |location=Oslo, Norway |publisher=Signal Publications |isbn=82-993535-1-3 |language=no }}
* Keskinen, Kalevi and Stenman, Kari ''Finnish Air Force 1939-1945'' {{ISBN|0-89747-387-6}}.
* {{cite book |last1=Keskinen |first1=Kalevi |last2=Stenman |first2=Kari |title = Finnish Air Force 1939-1945 |year=1998 |publisher=Squadron/Signal Publications |isbn = 0-89747-387-6}}
* "Last of a Genus...The Heinkel 115". ''[[Air International]]'', February 1987, Vol. 32 No. 2. pp.&nbsp;96–101. ISSN 0306-5634.
* "Last of a Genus...The Heinkel 115". ''[[Air International]]'', February 1987, Vol. 32 No. 2. pp.&nbsp;96–101. ISSN 0306-5634.
* "Last of a Genus...The Heinkel 115 Part Two". ''Air International'', March 1987, Vol. 32 No. 3. pp.&nbsp;154–156. ISSN 0306-5634.
* "Last of a Genus...The Heinkel 115 Part Two". ''Air International'', March 1987, Vol. 32 No. 3. pp.&nbsp;154–156. ISSN 0306-5634.
* {{cite book |last = Munson |first = Kenneth |title = German Aircraft Of World War 2 in colour |location = Poole, Dorset, UK |publisher = Blandford Press |year = 1978 |language=en |isbn = 0-7137-0860-3}}
* Munson, Kenneth. ''Fighters and Bombers of World War II''. London: Peerage Books. 1983. {{ISBN|0-907408-37-0}}
* {{cite book |last = Munson |first = Kenneth |title = Fighters and Bombers of World War II |location = London, UK |publisher = Peerage Books |date = 1983 |language=en |isbn = 0-907408-37-0}}
* Norrbom, Gösta {{lang|se|Att flyga är att leva}} ISBN unstated
* Norrbom, Gösta {{lang|se|Att flyga är att leva}} ISBN unstated
* {{cite book |last1 = Smith |first1 = John Richard |first2 = Anthony L. |last2 = Kay |first3 = Eddie J. |last3 = Creek |title = German Aircraft of the Second World War |location = London, UK |publisher = Putnam and Company Ltd. |year = 1972 |language=en |isbn = 978-1-55750-010-6}}
{{refend}}
{{refend}}



Latest revision as of 18:40, 10 December 2024

He 115
Finnish Air Force He 115 N
General information
TypeTorpedo bomber seaplane
ManufacturerHeinkel
StatusRetired
Primary usersLuftwaffe
Number built138
History
Introduction date1939
First flightAugust 1937

The Heinkel He 115 was an all-metal twin-engined military seaplane designed and produced by the German aircraft manufacturer Heinkel. Early on its flying history, the He 115 established several new international records for floatplanes.[1]

The He 115 was developed during the latter half of the 1930s in response to a requirement issued by the German Reichsluftfahrtministerium (RLM). Heinkel opted to design a three-seat seaplane that could function as a torpedo bomber, reconnaissance aircraft and minelayer. The initial model of the aircraft, the first prototype of which performed its maiden flight in August 1937, was powered by a pair of 960 PS (947 hp, 720 kW) BMW 132K nine-cylinder air-cooled radial engines. Subsequent models varied in several respects, such as being equipped with different engines or alternative armament arrangements, increased fuel capacity or payload, and some He 115s could even accommodate an additional crew member.

The He 115 saw active combat with multiple operators, particularly during its service with the Luftwaffe during the Second World War. Early on in the conflict, German He 115s frequently deployed mines within British waters. It proved itself to be a capable anti-shipping platform, particularly against Arctic supply convoys. Other nations flew the He 115, the majority being Scandinavian. The Royal Norwegian Navy Air Service operated a number that flew missions against the German invasion of Norway; several survivors escaped the occupation by flying to the UK, where they continued to be flown against the Germans until they were lost. By the twenty-first century, while a few airframes have survived, none are currently on display to the public and none are flightworthy.

Development and design

[edit]

The origins of the He 115 can be traced back to 1935 and the issuing of a requirement by the German Reichsluftfahrtministerium (RLM) that called for a twin engined general purpose floatplane, suitable for maritime patrol and anti-shipping strikes with both bombs and torpedoes. Numerous aircraft manufacturers responded with their own proposals, including Heinkel Flugzeugwerke and the Blohm & Voss aircraft subsidiary Hamburger Flugzeugbau. On 1 November 1935, orders were placed with both Heinkel and Hamburger Flugzeugbau to produce three prototypes of their prospective designs, designated the He 115 and the Ha 140 respectively.[2][3]

In terms of its general configuration, the He 115 was an all-metal mid-wing monoplane with a monocoque fuselage.[4] It was equipped with a pair of floats, each of which was attached to the underside of the engine nacelles via a large strut. The twin-spar wing was built in three sections.[4] It featured a stepped cockpit along with a rear-facing observation compartment.[5] Initially, the He 115's armament consisted of two 7.92 mm (.312 in) MG 15 machine guns, one in the nose and one in the dorsal position.[2] On later-build He 115s, the typical armament fitted included a fixed forward-firing 15 mm or 20 mm MG 151 cannon and two rearward-firing 7.92 mm (.312 in) MG 17 machine guns in the engine nacelles.[6][7] Furthermore, some variants carried LTF 5 or LTF 6b torpedoes and SD 500 500 kg (1,100 lb) or SC 250 250 kg (550 lb) bombs, while others carried LMB III or LMA mines.

During August 1937, the first prototype He 115 performed its maiden flight.[8] Flight testing went relatively smoothly, the type's flight characteristics proving to be quite favourable.[4] In early 1938, the He 115 was selected over the rival Ha 140, thus securing a second order for another prototype and 10 pre-production aircraft.[2] According to aviation historian Hans Amtmann, Hamburger Flugzeugbau did not have enough spare manufacturing capacity for series production and declined the order, leading to Heinkel's selection instead.[9] During March of that year, the first prototype was used to establish a series of international records for floatplanes over 1,000 km (620 mi) and 2,000 km (1,200 mi) closed circuits at a speed of 328 km/h (204 mph).[1] Prior to these records being set, the prototype had been modified to achieve greater aerodynamic performance, such as the deletion of the angular glazed nose and the rear compartment, which were replaced by fairings.[8]

The third and fourth prototypes including a continuous glazed canopy (between the windshield and the rear position) and angled bracing struts between the vertical struts attached to the floats respectively.[8] In 1937, ten pre-production He 115s were completed; deliveries of production standard aircraft to the Luftwaffe commenced one year later. The He 115A-3 was the first variant to be produced in quantity, it differed from earlier models by having a revised bomb bay and radio apparatus. During 1939, the improved HE 115B-1, which featured a more than 50 percent increase in fuel capacity, was introduced.[8]

While production came to an end during the first half of the Second World War, the He 115 was highly regarded, to the extent that production was resumed in 1943, despite an increasingly large proportion of German's aircraft manufacturing capacity being allocated to defensive fighter aircraft instead.[10]

Operational history

[edit]

Luftwaffe

[edit]
A German Heinkel He 115B of 1./Küstenfliegergruppe 206 on a crane.

Throughout the Second World War, the primary mission of the Luftwaffe's He 115s was to conduct minelaying, typically during night time to lower the likelihood of interception.[4] Following the first such mission on 20 November 1939, the He 115 was frequently used for dropping (typically via parachute) magnetic mines in British waters, normally aiming for narrow passages close to busy ports on the English south coast; the River Thames was also a prime target. These mining efforts supplemented the efforts of the Kriegsmarine.[11] The island of Sylt was used as a base for He 115s performing these missions; in response, it became a target for Allied bombing missions.[12]

Perhaps the most effective missions performed by the He 115 were its anti-shipping operations against Arctic convoys, for which it operated out of bases in occupied northern Norway. Due to early convoys lacking any air cover, the slow and lightly-armed He 115 was less vulnerable during these attacks than it was when operating near to the English coast. Following the appearance of carriers and escort carriers, coupled with the arrival of new Soviet heavy fighters like the Petlyakov Pe-3bis, Luftwaffe air superiority over the convoys was challenged and losses increased.[citation needed]

He 115 shot down by de Havilland Mosquito.

Apart from its use as a minelayer and torpedo bomber, the He 115 was used for coastal reconnaissance and by KG 200 to drop agents behind enemy lines.[13]

Royal Norwegian Navy Air Service

[edit]
Norwegian He 115Ns in 1939–1940.

In response to the rising tensions in Europe, the Norwegian Ministry of Defence had ordered six He 115Ns for the Royal Norwegian Navy Air Service (RNoNAS) on 28 August 1939 and the aircraft were delivered from 14 July – 13 November 1939.[14] The He 115N order was intended to replace the RNoNAS fleet of 1920s vintage Douglas DT torpedo bombers and the obsolescent Marinens Flyvebaatfabrikk M.F.11, which was the mainstay of the RNoNAS in 1940.[15] The Norwegians signed another order of six He 115Ns in December 1939, with delivery expected in March/April 1940 but this was forestalled by Operation Weserübung, the German invasion of Norway of 9 April 1940.[14] At the outbreak of hostilities, the RNoNAS had six He 115Ns in service (F.50, F.52, F.54, F.56, F.58 and F.60) spread along the coast from the naval air stations at Sola and Flatøy in the south to the one at Skattøra Naval Air Station outside Tromsø in the north. At the beginning of the German invasion, the aircraft at the seaplane base at Hafrsfjord near Stavanger (F.60) was captured by the Germans, but two Luftwaffe He 115s (given the codes F.62 and F.64 in Norwegian service) were seized by an improvised militia unit of Norwegian riflemen at Ørnes in Glomfjord, Nordland and by police officers at Brønnøysund, Nordland. The two aircraft were seized after they ran out of fuel and had to make emergency landings on 10 April. Manned by Norwegian aircrews, they served against their former owners for the duration of the campaign.[12]

Seven Norwegian He 115s, five of them He 115Ns, were employed against German and German-controlled ships (see: HNoMS Uller), as well as providing ground support to the Norwegian Army offensive on the Narvik Front. On 14 April 1940, three Norwegian He 115s made a successful attack on German Ju 52s at Gullesfjordbotn. Four of the Norwegian aircraft (F.52, F.56, F.58 and F.64) made the journey to the United Kingdom shortly before the 10 June 1940 surrender,[12] a fifth (F.50) escaping to Finland, landing on Lake Salmijärvi in Petsamo.[16] A sixth He 115 (F.54) also tried to make the journey to Britain but was lost over the North Sea. The last of the Norwegian He 115s, F.62 (one of the two captured German aircraft), was unserviceable at the time of the evacuation and was abandoned at Skattøra, later being repaired and flown by the Germans.

Royal Air Force

[edit]

The four escaped aircraft were reformed into the Norwegian Helensburgh Group under Commander Bugge.[12] The exiled Norwegian Cabinet Nygaardsvold made plans shortly after arriving in Britain to use the four He 115s to perform leaflet dropping missions over Norway. This leaflet mission was to deliver a declaration to the Norwegian people, stating the Norwegian authorities were re-established in the UK and rejected any Nazi German overtures for a German–Norwegian peace deal. All four Norwegian He 115s were ordered from Helensburgh to Scapa Flow on 3 July 1940 to carry out the mission, although one had to return to Helensburgh due to engine problems. The three He 115s assembled at Scapa Flow were ordered to fly to Norway and drop the declaration over the cities of Oslo, Bergen and Trondheim. Shortly before the mission was to get under way, the British Air Ministry intervened and stopped the expedition, insisting that such an undertaking would be suicidal to attempt with the slow flying He 115s. Three days later, the aircraft returned to Helensburgh.[17]

Three of the Norwegian He 115s (F.56, F.58 and F.64) were subsequently used in covert operations off Norway and in the Mediterranean Sea with Norwegian crews. In British service, the three received new serial numbers, BV184, BV185 and BV187.[14] BV184 was attacked and damaged by two Polish Spitfire fighters over the Bay of Biscay in the spring of 1942, while co-operating with French fishing boats and later lost in a refuelling fire in the UK.[18][14] BV185 was destroyed in an Italian air raid on Kalafrana, Malta after flying just one clandestine operation to North Africa.[14][12] BV187 flew several missions on the North African coast from its base in Malta before being destroyed by a pair of German Bf 109s.[14]

Finnish Air Force

[edit]
Heinkel He 115A of LeLv 15 on lake Höytiäinen. August 1941.

On 8 June 1940, the day after Norwegian forces were ordered to cease hostilities, one He 115 (F.50, deemed technically unfit to be flown to the UK), was flown to Finland posing as a civilian aircraft LN-MAB. The floatplane was interned but the pilot, experienced line captain and naval lieutenant Helge Dahl and crew were free to leave Finland. From Summer 1941, it was used by the LLv.14 of the Finnish Air Force code HE-115 and named "Jenny", to ferry Sissi troops behind Soviet lines. In this role, it proved valuable in a terrain with numerous secluded lakes. It served in this role until ambushed in East Karelia on 4 July 1943. Jenny took off but soon had to ditch and the crew was taken prisoner. Two days later the floating HE-115 was strafed by Finnish Morane-Saulnier MS.406 fighters. There are reports that the Soviets salvaged the wreck for evaluation.[14] A pair of Luftwaffe He 115 C were borrowed for similar operations in 1943–44 and operated with German markings by Finnish crew. One was returned in 1944 but the other was surrendered to the Soviets after the signing of the Moscow Armistice.[citation needed]

Swedish Air Force

[edit]

The Swedish Air Force operated 12 He 115A-2s under the local designation T 2, with Air Force numbers 101–112. Another six aircraft were ordered but never delivered due to the outbreak of the Second World War. They were sturdy and well liked by their crews and were not taken out of use until 1952. The Swedish T 2s were kept on duty throughout the Second World War and made a valuable contribution to protecting and enforcing Swedish neutrality. The T 2s replaced the outdated T 1s (Heinkel HD 16s) as torpedo bombers and also served as regular bombers, for smoke screening and for long-range reconnaissance missions. Five of the 12 T 2s were lost in accidents during their service with the Swedish Air Force.[19]

Variants

[edit]

Prototypes

[edit]

Five prototypes were used in the development of the aircraft,

  • He 115 V1 August 1937, set eight payload/speed records
  • He 115 V2 November 1937, similar to V1
  • He 115 V3 March 1938, introduced glassed cockpit, which became standard
  • He 115 V4 May 1938, production prototype, introduced struts in place of wires between the fuselage and floats
  • He 115 V5 1939

Production

[edit]

The basic design of the aircraft remained unchanged during the type's career. The main differences, with a few notable exceptions, were changes in armament and avionics. Also to note is that the 'new' 'E' version, launched when production restarted in 1941, is in fact similar to the 'C'-series, again with the exception of armament changes.

  • He 115 A-0 10 pre-production examples, armed with a single machine gun
  • He 115 A-1 added a nose-mounted machine gun.
  • He 115 A-2 similar to A-1, exported to Norway and Sweden
  • He 115 A-3 modified weapons bay and changes to the radio equipment
  • He 115 B-0 the 'B'-series introduced the ability to trade fuel and bomb load, as well as the possibility to carry a 1,000 kg (2,200 lb) magnetic mine
  • He 115 B-1 added increased fuel capacity
    • He 115 B-1/R1
    • He 115 B-1/R2
    • He 115 B-1/R3
  • He 115 B-2 had reinforced floats for operation from ice or snow
  • He 115 C-1 introduced additional armament
    • He 11 5C-1/R1
    • He 115 C-1/R2
    • He 115 C-1/R3
    • He 115 C-1/R4
  • He 115 C-2 reinforced floats in same manner as B-2
  • He 115 C-3 minelayer version.
  • He 115 C-4 torpedo bomber version.
  • He 115 D one aircraft fitted with BMW 801C engines rated at 1,147 kW (1,560 PS) each.
  • He 115 E-1 similar to the 'C'-series, but with revised armament.

Operators

[edit]
 Finland
Nazi Germany Germany
 Norway
 Spanish State
 Sweden
 United Kingdom

Surviving aircraft

[edit]
Heinkel He 115 in restoration at the Flyhistorisk Museum, Sola.
  • He 115 A-2 Werknr. 3043? Recovered from Russia, now in storage with private owner in France.[citation needed]
  • He 115 B/C Werknr. 2398 sunk to the bottom of a fjord on 26 December 1942[20] and was recovered from Hafrsfjord in Norway on 2 June 2012. It was part of 1 Staffel, Seefernaufklärungsgruppe 906 (No. 1 Squadron, 906 Maritime Reconnaissance Group), known until February 1941 as Küstenfliegergruppe 906 (906 Coastal Aviation Group), Luftflotte 5. In July 2012, the aircraft was in storage awaiting restoration at the Flyhistorisk Museum, Sola near Stavanger.[21]
  • The wreck of a He 115 was located at the bottom of the lake Limingen in Nord-Trøndelag, Norway in 2013.[22]

Specifications (He 115 B-1)

[edit]
He 115

Data from Fighters and Bombers of World War II[23]

General characteristics

  • Crew: three
  • Length: 17.3 m (56 ft 9 in)
  • Wingspan: 22.28 m (73 ft 1 in)
  • Height: 6.6 m (21 ft 8 in)
  • Wing area: 87.5 m2 (942 sq ft)
  • Airfoil: root: NACA 2221[24]
  • Empty weight: 5,290 kg (11,662 lb)
  • Gross weight: 10,400 kg (22,928 lb)
  • Powerplant: 2 × BMW 132K nine-cylinder air-cooled radial piston engines 960 PS (950 hp; 710 kW)
  • Propellers: 3-bladed variable-pitch propellers

Performance

  • Maximum speed: 327 km/h (203 mph, 177 kn)
  • Combat range: 2,100 km (1,300 mi, 1,100 nmi)
  • Service ceiling: 5,200 m (17,100 ft)
  • Wing loading: 103.8 kg/m2 (21.3 lb/sq ft)
  • Power/mass: 0.139 kW/kg (0.085 hp/lb)

Armament

  • 1 × fixed 7.92 mm (.312 in) MG 17 machine gun and 1 × flexible 7.92 mm (.312 in) MG 15 machine gun in dorsal and nose positions
  • Five × 250 kg (550 lb) bombs or two such bombs and one torpedo of 800 kg (1,800 lb)
  • One 920 kg (2,030 lb) sea mine.[23]

See also

[edit]

Aircraft of comparable role, configuration, and era

Related lists

References

[edit]

Citations

[edit]
  1. ^ a b Air International February 1987, p. 96.
  2. ^ a b c Air International February 1987, p. 97.
  3. ^ Donald 1994, p. 108.
  4. ^ a b c d Smith and Kay 1972, p. 269.
  5. ^ Smith and Kay 1972, pp. 269-270.
  6. ^ Air International February 1987, p. 101.
  7. ^ Air International March 1987, p. 155.
  8. ^ a b c d Smith and Kay 1972, p. 270.
  9. ^ Hans Amtmann; "Blohm & Voss Remembered", Aeroplane Monthly, February 1988, pp. 25-26.
  10. ^ Smith and Kay 1972, pp. 269, 273-274.
  11. ^ Smith and Kay 1972, pp. 271-272.
  12. ^ a b c d e Smith and Kay 1972, p. 272.
  13. ^ "KG 200 -- Unternehmen Moewe -- history -- stahlbrandt.com". www.stahlbrandt.com.
  14. ^ a b c d e f g Luftwaffe.no: Heinkel He 115 in Norway Archived 28 September 2007 at the Wayback Machine
  15. ^ Hafsten 2003, pp. 87–90.
  16. ^ FAF in Color: Finnish Air Force Aircraft: Heinkel He 115[permanent dead link]
  17. ^ Hafsten 1991, p. 297.
  18. ^ Berg 1997, p. 93.
  19. ^ Avrosys.nu: T 2 - Heinkel He 115 (1939-1952) Archived 5 February 2007 at the Wayback Machine
  20. ^ Minion, Main (24 April 2012). "WW2 German seaplane to be salvaged in Norway". X-Ray Mag. Retrieved 18 January 2024.
  21. ^ "Heinkel 115 recovered in Norway". Aeroplane. No. August 2012. Cudham, UK: Kelsey Publishing. p. 6. ISSN 0143-7240.
  22. ^ Aamodt, Torill; Flatås, Solvår (2 September 2013). "Tysk fly funnet på bunnen av innsjø". nrk.no (in Norwegian).
  23. ^ a b Munson 1983, p. 197.
  24. ^ Lednicer, David. "The Incomplete Guide to Airfoil Usage". m-selig.ae.illinois.edu. Retrieved 16 April 2019.

Bibliography

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  • Berg, Ole F. (1997). I skjærgården og på havet – Marinens krig 8. april 1940 – 8. mai 1945 (in Norwegian). Oslo, Norway: Marinens krigsveteranforening. ISBN 82-993545-2-8.
  • Donald, David, ed. (1994). Warplanes of the Luftwaffe. London, UK: Aerospace Publishing. ISBN 1-874023-56-5.
  • Eden, Paul; Moeng, Soph, eds. (2002). The Encyclopedia of World Aircraft. Silverdale Books. ISBN 1-85605-705-4.
  • Hafsten, Bjørn; Arheim, Tom (2003). Marinens Flygevåpen 1912–1944 (in Norwegian). Oslo, Norway: Signal Publications. ISBN 82-993535-1-3.
  • Keskinen, Kalevi; Stenman, Kari (1998). Finnish Air Force 1939-1945. Squadron/Signal Publications. ISBN 0-89747-387-6.
  • "Last of a Genus...The Heinkel 115". Air International, February 1987, Vol. 32 No. 2. pp. 96–101. ISSN 0306-5634.
  • "Last of a Genus...The Heinkel 115 Part Two". Air International, March 1987, Vol. 32 No. 3. pp. 154–156. ISSN 0306-5634.
  • Munson, Kenneth (1978). German Aircraft Of World War 2 in colour. Poole, Dorset, UK: Blandford Press. ISBN 0-7137-0860-3.
  • Munson, Kenneth (1983). Fighters and Bombers of World War II. London, UK: Peerage Books. ISBN 0-907408-37-0.
  • Norrbom, Gösta Att flyga är att leva ISBN unstated
  • Smith, John Richard; Kay, Anthony L.; Creek, Eddie J. (1972). German Aircraft of the Second World War. London, UK: Putnam and Company Ltd. ISBN 978-1-55750-010-6.
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