Nazi Germany (1936)
Shipborne and coastal reconnaissance aircraft – 98~118 Built
In the mid-thirties, the German Ministry of Aviation (Reichsluftfahrtministerium – RLM) tasked the Heinkel company with developing a replacement for the He 60 shipborne and reconnaissance aircraft. While Heinkel fulfilled the request by building the He 114, its overall performance was deemed insufficient for German standards.
History
During the early thirties, the He 60 was adopted for service as the main German shipborne and coastal reconnaissance aircraft. As it was considered outdated, in 1935, the RLM issued to Heinkel a request for a new shipborne and coastal reconnaissance aircraft that was to replace the He 60. The next year, two prototypes were completed. While it was originally planned to test these aircraft with the BMW 132 engine, due to lack of availability, this was not possible. The first prototype (with D-UBAM marking) made its maiden flight in September 1936. It was powered by a Daimler Benz DB-600A which gave out 900 hp. The test results of the first flight were disappointing, as it proved difficult to control on the water but also in the air. The second prototype, V2 (D-UGAT), powered by a 740 hp Jumo 210 E, made its first flight in December 1936. It was used to test the catapult launching capabilities of this aircraft. It had some modifications in comparison to the first prototype, like having a larger tail and redesigned floats. Despite some improvements, the catapult launch testings from the Gneisenau showed that the He 114 was not suited for this role.
Despite not having a promising start, further prototypes were ordered. The V3 (D-IDEG) prototype was powered by an 880 hp BMW 132 K (or D, depending on the source) engine. The floats were once again redesigned and the pilot had a better-glazed shield. This aircraft was tested in April 1937 with similar performance as previous versions.
V4 (D-IOGD) made its maiden test flight in August 1937. It had many modifications in order to improve its performance. The wing’s edges were redesigned, new floats were used and it was also fitted with machine gun armament. V5 (D-IQRS) had new improved floats which enabled it to take-off even from ice. While most sources mention only five prototypes, some note that there were two more. The V6 and V7 prototypes were tested with similar equipment and were armed with two machine guns, one firing through the propeller and the second mounted to the rear. Additional armament tested consisted of two 50 kg (110 lb) bombs.
Technical characteristics
The He 114 was designed as a single-engine, all-metal, twin crew biplane aircraft. It had a monocoque oval-shaped fuselage design. It was powered by one BMW 132K 960 hp nine-cylinder radial engine. The fuel load consisted of 640 l.
Somewhat unusual for biplanes of the era, the lower wings were much smaller than the upper ones. They had a half-elliptical design and were thicker than the upper wings. The upper wing was connected to the fuselage by two ‘N’ shaped struts. There were also two ‘Y’ struts connecting the lower and the upper wings. The upper wing was constructed using three parts with two ailerons. The upper wing could, if needed, be folded to the rear. The landing gear consisted of two floats which could also act as auxiliary fuel storage tanks with 470 l each.
The crew consisted of the pilot and the rear positioned machine gunner/observer. The armament consisted of one MG 15 7.92 mm (0.31 in) machine gun placed to the rear. The ammunition load for this machine gun was 600 rounds. Additionally, there was an option to externally mount two 50 kg (110 lb) bombs.
Further development
Despite being shown to have poor performance, a small production run was made by Heinkel. Some 10 (or 6 depending on the source) aircraft of the A-0 series, together with 33 of the A-1 series would be built. The only difference was the use of a larger rear tail design on the He 114A-1 series. The small number of He 114 built were given to various test units and flight schools, where its performance was often criticized by all. During its introduction to service, the much more promising Ar-196 was under development, but it would need some time until production was possible. As a temporary solution, the Luftwaffe officials decided not to retire the He 60 from service yet. Heinkel was informed that, due to the He 114’s overall poor performance, it would not be accepted for service and that it would be offered for export if anyone was interested. For this reason, Heinkel developed the He 114A-2 series. The He 114A-2 had a reinforced fuselage, floats that could be used as fuel storage tanks, and, additionally, it was modified to have catapult attach points. The He 114A-2, while tested, was not operated by the Luftwaffe, and it was used for the export market.
The following B-series (including B-1 and B-2) were actually just A-2 planes with some slight improvements, meant primarily for export. The history of the C-series is somewhat unclear, as it appears to be specially developed for Romania. It was much better armed, with either two 20 mm (0.78 in ) MG 151 cannons, two 13 mm (0.51 in) MG 131 heavy machine guns, or even two MG 17 7.92 mm (0.31 in) (the sources are not clear) placed inside the lower wings. Some sources also mention that additional machine guns were installed inside the engine compartment and could be fired through the propeller. Additionally, it appears that its fuselage was modified to be able to carry two additional 50 kg (110 lb) bombs. The rear positioned MG 15 was unchanged. This version also had a new Junkers type 3.5 m diameter propeller. The floaters were also slightly redesigned and it received smoke screen trovers. Additionally, to provide better stability while positioned near shore, a small anchor could be realized.
Operational use
Despite not being accepted by the Luftwaffe, due to the Kriegsmarine’s (German war navy) lack of sufficient seaplanes, some He 114 had to be used for this purpose. The distribution of the He 114 began in 1938 when the 1./Küstenfliegergruppe 506 was equipped with this aircraft. In 1939, it was 43equipped with the older He 60, as these proved to be better aircraft. Some German ships, like the Atlantis, Widder, and Pinguin, received these aircraft. During their use, the He 114 floater units proved to be prone to malfunctions. These were reported to be too fragile and could easily be broken down during take-off from the sea during bad weather.
A group of 12 He 114 C-1 aircraft that were to be sold to Romania were temporarily allocated to the 2nd Squadron of the 125th Reconnaissance Group (2/125 Aufkl.Sta.). These units operated in the area of Finland’s shore. When the Bv 138 became available in sufficient numbers, the He 114 C-1 was finally given to Romania.
Foreign use
While the He 114 failed to get any large production orders in Germany, it did see some export success. These included Denmark, Spain, Romania and Sweden. The B-series was sold, which was more or less a copy of the A-2 series.
In Danish service
The Danish use of the He 114 is not clear. Depending on the source, there are two versions. In the first, Denmark managed to buy 4 He 114 aircraft and even ordered more, but the German occupation stopped any further orders. In the second, while Denmark wanted to buy some He 114, nothing came of it, once again due to German occupation.
In Spanish service
During 1942, Spain obtained some 4 He 114s from the Germans. In Spanish service, these were known as HR-4. Despite their obsolescence and lack of spare parts, these would remain in use up to 1953.
In Romanian service
Romania received a group of 12 He 114 in 1939. During the war, the number would be increased to 29 in total. These would be extensively used to patrol the Black Sea. At the end of the war, these were captured by the Soviets, who confiscated them. Some would be returned to Romania in 1947, which would continue to use them up to 1960, when they were scrapped.
In Swedish service
Sweden bought some 12 He 114 in March 1941. In Swedish service, these would be renamed to S-12. Despite being an unimpressive design and prone to malfunction, the Swedish used them extensively during the period of 1941 to 1942, with over 2054 flight missions. They would remain in service up to 1945, with six aircraft being lost in accidents.
Production
Despite its poor performance, Heinkel undertook a small production of the He 114. The number of produced aircraft ranges from 98 to 118 depending on the source.
- He 114 Prototypes – Between 5 to 7 prototypes were built
- He 114 A – Limited production series
- He 114 B – Export version of the A-series
- He 114 C – Slightly improved version with stronger armament
Operators
- Germany – Small numbers of these aircraft were operated by the Luftwaffe and Kriegsmarine, but their use was limited
- Denmark – Possibly operated four He 114 before the German occupation
- Spain – Bought four He 114, and operated them up to 1953
- Sweden – Bought 12 He 114 in March 1941, which remained in use until 1945
- Romania – Operated 29 He 114, with the last aircraft being scrapped in 1960
Surviving aircraft
While there are no complete surviving He 114s various parts and wrecks have been found over the years. Parts of one wreck were found in lake Siutghiol near Mamaia, on the Romanian Black Sea coast, in 2012. There is a possibility that the wreck of another lays in a lake near Alexeni as well.
Conclusion
The He 114 was an unsuccessful design that failed to gain any larger production orders in Germany. It had difficult controls both in the air and on the water. While it would see some limited service with the Luftwaffe, most would be sold abroad, where some were used up to the ’60s.
| Specifications – He 114A | |
| Wingspan | 44 ft 7 in / 13.6 m |
| Length | 38 ft 2 in / 11.65 m |
| Height | 17 ft 2 in / 5.23 m |
| Wing Area | 455 ft² / 42.27 m² |
| Engine | One BMW 132K 960 hp nine-cylinder radial engine |
| Empty Weight | 5.070 lb / 2.300 kg |
| Maximum Takeoff Weight | 8.090 lb / 3.760 kg |
| Fuel Capacity | 640 liters |
| Climb Rate to 1 km | In 4 minute 20 second |
| Maximum Speed | 208 mph / 335 km/h |
| Range | 572 mi / 920 km |
| Maximum Service Ceiling | 16,075 ft / 4,900 m |
| Crew | One pilot and one rear gunner |
| Armament |
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Gallery
Illustrations by Ed Jackson
Sources
- D. Nešić (2008), Naoružanje Drugog Svetskog Rata Nemačka Beograd
- M. Griehl (2012) X-Planes German Luftwaffe Prototypes 1930-1945, Frontline Book.
- S. Lonescu and C. Craciunoi, He 114, Editura Modelism
- Jean-Denis G.G. Lepage Aircraft Of The Luftwaffe 1935-1945, McFarland and Company.
- Ferenc A. and P. Dancey (1998) German Aircraft Industry And Production 1933-1945. Airlife England.
https://www.cugetliber.ro/stiri-eveniment-hidroavion-din-al-doilea-razboi-mondial-descoperit-in-lacul-tasaul-201060
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