{{Infobox aircraft | name = Euler D.II | logo = | logo_size = | image = | alt = | caption = | long_caption = | other_names = | aircraft_type = Fighter | aim = | outcome = | related = | national_origin = | manufacturer = Euler-Werke | design_group = | designer = August Euler | builder = | issuer = | status = | owners = | primary_user = Luftstreitkräfte | more_users = | service = | major_applications = | proposals = | prototypes = | number_built = 30 | construction_number = | civil_registration = | military_serial = | radio_code = | requirement = | aircraft_carried = | flights = | total_hours = | total_distance = | construction_date = | introduction = December 1917 | retired = 1918 | first_flight = early 1917 | initiated = | in_service = | last_flight = | expected = | developed_from = | variants = | developed_into = | preservation = | fate = | predecessors = | successors = | concluded = }}

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 9-cylinder rotary.

==Operational history== 30 D.II fighters were ordered by the German air force in March 1917, however due to slow production these were not delivered until December 1917. As a result, the D.II was relegated to the role of a trainer aircraft for the rest of the war.

==Operators== ;{{flag|German Empire}} *''Luftstreitkräfte''

==Specifications== {{Aircraft specs |ref=''German Aircraft of the First World War'' <ref name=Gray>{{cite book |last=Gray |first=Peter |last2=Thetford |first2=Owen |title=German Aircraft of the First World War |year=1970 |publisher=Putnam |location=London |isbn=0-370-00103-6 |edition=2nd |page=330}}</ref> |prime units?=met <!-- General characteristics --> |crew=1 |length m=5.94 |length note= |span m=7.47 |span note= |height m=2.75 |height note= |wing area sqm= |wing area note= |aspect ratio=<!-- sailplanes --> |airfoil= |empty weight kg=380 |empty weight note= |gross weight kg=615 |gross weight note= |max takeoff weight kg= |max takeoff weight note= |fuel capacity= |more general= <!-- Powerplant --> |eng1 number=1 |eng1 name=Oberursel U.I |eng1 type=9-cylinder air-cooled rotary piston engine |eng1 kw=<!-- prop engines --> |eng1 hp=100 |eng1 note=

|prop blade number=4 |prop name=fixed-pitch propeller |prop dia m=<!-- propeller aircraft --> |prop dia note= <!-- Performance --> |max speed kmh=145 |max speed note= |cruise speed kmh= |cruise speed note= |stall speed kmh= |stall speed note= |never exceed speed kmh= |never exceed speed note= |range km= |range note= |combat range km= |combat range note= |ferry range km= |ferry range note= |endurance=1 hour 30 minutes |ceiling m= |ceiling note= |g limits=<!-- aerobatic --> |roll rate=<!-- aerobatic --> |climb rate ms= |climb rate note= |time to altitude={{cvt|2000|m}} in 9 minutes 30 seconds |wing loading kg/m2= |wing loading note= |fuel consumption kg/km= |power/mass= |more performance= <!-- Armament --> |guns=1 x engine-mounted 7.92mm machine gun }}

==References== {{reflist}}

==Further reading== * William Green and Gordon Swanborough. ''The Complete Book of Fighters''. Colour Library Direct, Godalming, UK: 1994. {{ISBN|1-85833-777-1}}.

{{Nieuport V-strutters}} {{Idflieg D-class designations}}

{{DEFAULTSORT:Euler D.Ii}} Category:1910s German fighter aircraft Category:Sesquiplanes Category:Rotary-engined aircraft Category:Aircraft first flown in 1917