WW1 Planes
An encyclopediae of 1914-18 aircraft types

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Euler D.II
Euler .II (wikimedia commons)

Euler, born in Westphalia and educated at Oelde and in Aachen started an engineering carrer in 1885, for Seidel & Neumann, a sewing machine company. Later the company turned to cycles and motor cars. Euler himself took over the cycle racing and later motor racing activities, which bring him to aviation. In January 1908 he settled a workshop at Mainz castle to produced licenced-built Voisins. In February he created a 2,400 Marks factory at Griesheim Airport and started large scale aircraft production. He won in 1910 the longest flight at 3hr 6min. 18sec and obtained the first German Pilot's brevet while creating his own flying school. He moved his factory to Frankfurt and joined the newly formed German aircraft manufacturers' association. After the war Euler became Secretary of State for Air and created the ministry for transportation, and after the Versailles treaty was ratified in 1920 he resigned.

Euler models

The first model from Euler was a private venture outside any order, prewar. It flew in exhibitions and was soon noted for its excellent performances, and praised by Oskar Ursinus (of the german magazine Flugsport) for its aesthetics to match. This civilian sport model was later developed into the Euler B.I in wartime, tested and adopted by the German Army. The Euler B.I was its official Idflieg designations, and the company manufactured 6 according to a photo, another showing a row under construction. The next Euler B II produced at the end of 1914 was a different plane, a close copy of the L.V.G. Instead of a tricycle undercarriage it had a standard one, and a 100 h.p. Mercedes D I inline engine capable of carrying the plane up to 120 kph (75 m.p.h.) and climb at 3.000 m (9,840 ft.) in 29 minutes, for 4 hours of autonomy. The Euler B.II Weighted 757/1,172 kg. empty and loaded. The next Euler B.III was built in 1918 for training as a licence-built L.V.G. B.III, but with a considerable stagger, and a 120 h.p. Mercedes D II. engine. Production unknown. Another prewar model (1913) was the Euler Hydro-Triplane a pusher configuration amphibious triplane flying boat featured in the French magazine L'Aérophile. It was propelled by a 70 hp engine Gnome engine, and was made famous also by the Magazine Flight as the best of its kind, this time motorized with a 100 hp (75 kW), nine cylinder Gnome Delta rotary engine. It was remarkably the first true amphibian, with the mainwheels placed on the upper and lower pairs of struts. But it was never used by the Military.

Euler B.II - IWM
Euler B.II (IWM)

The Euler D.I was a single-seat biplane fighter closely based on the French Nieuport 17. After seeing the success of the French fighter, German designer August Euler start working on a German version on this design. The Euler D.I first flew in late 1916 powered by an 80 hp engine and single synchronized machine gun on the front. The two prototypes were in frontline service by October 1916, and after excellent results, 50 were ordered the same month, and 50 more in early 1917, largely transferred over to the Euler D.II. However being late in the game and few in numbers, the D.I was relegated as an advanced fighter trainer until the war's end. The Euler D.II was a German single-seat fighter, the successor to the earlier Euler D.I. The D.II was essentially a re-engined Euler D.I, the air-frame being virtually unchanged and the power plant being a 100 hp Oberusel U I seven cylinder rotary. Thirty were delivered to the German air force in March 1917, but due to slow production they delivered up to December 1917 and it was seen as obsolete and relegated to the role of a trainer for the remainder of the war.

Euler D.III
Euler D.III (pinterest)

Little information is available on the model C. The Dr.I series however was largely an experimental triplane serie of fighters. The Euler Dr 1 was powered with a 160 h.p. Oberursel U III engine but apparently stayed at prototype stage. The Dr 2 was another prototype, powered with a 160 h.p. Mercedes D III engine and the next Dr.3 was a development of the latter, fitted with a 100 h.p. Oberursel U I engine. The last one, Dr.4, emerged in 1916 and was ungainly and only intended for training. It featured side-by-side seats and was propelled by a 220 h.p. Mercedes D IV with reduction gears. None of these designations were official since none was accepted for service. All of these were designed by Julius Hromadnik, the first being under test in the summer of 1917. Competitors were the Hansa-Brandenburg Dr.I and DFW Dr I. It seems the 1918 Pusher Einsitzer (single seat) "Gelber Hund" (yellow hound) lacks any clear information. The "Vierdecker" was a unique experimental quadriplane version fighter.
  • Euler B.I reconnaissance 1914 (6)
  • Euler B.II reconnaissance tractor 1915 (c50)
  • Euler B.III trainer 1918 (?)
  • Euler C reconnaissance pusher 1914 (?)
  • Euler D.I fighter 1917 (c75)
  • Euler D.II fighter 1917 (c30)
  • Euler D.III fighter 1917 (?)
  • Euler Dr.I - triplane fighter 1917 (1)
  • Euler Dr.II - triplane fighter 1917 (1)
  • Euler Dr.III - triplane fighter 1917 (1)
  • Euler Dr.IV - triplane trainer 1918 (1)
  • Euler Dr.V - triplane project 1918 (1)
  • Euler Pusher Einsitzer fighter 1918 (1)
  • Euler Vierdecker (Quadruplane) fighter 1918 (1)

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