It makes no appearance on Shapeways, nary a mention on the excellent Wings of Linen site, and even difficult to find any mention here on the 'drome, yet the Euler D.I, a German fighter based on the Nieuport N.11 did see a smidge of action and built in numbers that would warrant a bit of a look from Wings players.
Seeing the superiority of the N.11 over the various eindeckers, August Heinrich Euler designed the D.I in response. Euler was the first person in Germany to be awarded a pilot's license and ran an aviation school before the war. His mechanic aptitude came from sewing machines, then cycles, then motor cars.
Equipped with an Oberursel U.0 7-cylinder air-cooled radial piston engine that generated 80 horsepower, the E.I could reach a top speed of 87 miles per hour (slower than the N.11 by 14 mph). Climb rate was also inferior as compared to the N.11 taking an additional four minutes to reach 2,000 meters. The E.I, unlike many other German fighters, used a synchronized Euler-patented machinegun. While it showed some promise, and 75 machines would be built, by the time it would have reached the frontlines it would have been mostly outclassed by Allied aircraft.
In reality there isn't much call for someone to provide a D.I via Shapeways as one could use a Nieuport N.11 in a pinch. Slap on some linen colored paint and some eisenkreuz and you pretty much have a D.I.
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