Oeffag (Oesterreichische Flugzeugfabrik AG) delivered 32 C.II aircraft, serialled 52.01 through 52.32, to the Austro-Hungarian army air force in 1916. A second series of 32 somewhat improved aircraft, 52.50 through 52.81, followed from February 1917, but the C.II had numerous deficiencies and began to be withdrawn from the front in the summer of 1917, to be used for training. Better known for producing Albatros fighters, the Oeffag factory was located here at Wiener Strasse airfield, now LOAN. Today Diamond builds aircraft here. Photo from: Fortepan

A peek into a hangar of the imperial and royal Austro-Hungarian army at its Wiener Strasse aerodrome, now Wiener Neustadt - Ost. The Lohner C.I was an armed version of the Lohner B.VII reconnaissance type. It was rejected for frontline use and issued to training units. Photograph part of a series that must have been taken in 1917 or 1918, not in 1915 as indicated by the source. Photo from: Fortepan

Knoller C.II was an Austro-Hungarian reconnaissance and bomber aircraft built during World War I. Production took place in three series of 25 pieces and the first was delivered to the Austro-Hungarian Air Force in September 1916. During a test flight in February 1917, the wings of the machine disintegrated and the crew died. This crash led to the cessation of production and further flying with the type. The aircraft produced were not included in combat units, most were used as aids for training ground personnel. Displayed aircraft is the only surviving specimen of this type.

The Fokker M.10E was used by the Austro-Hungarian army as its Fokker B.I, reportedly from April 1915. The Austrians adopted the German cross marking in 1915, initially in addition to their own red-white-red bands. Photo from: San Diego Air & Space Museum

This is the B.II prototype and over 5,200 examples of the type were eventually produced for the Austro-Hungarian AF.

The German Albatros B.II was designated B.I in the Austro-Hungarian army. Photo from: Fortepan

Austro-Hungarian Aviatik D.I fighters. Aircraft in the 184, 284 and 384 serial batches were built by WKF, the Wiener Karosserie- und Flugzeugfabrik. Other series were produced by Aviatik and four other manufacturers. Photo from: Fortepan

Fokker's first biplane was the M.7 of 1914. The M.10 was similar but with two additional struts towards the nose. The type sold to Austria-Hungary in two variants, the single-bay biplane M.10E, Austro-Hungarian designation B.I, and the two-bay M.10Z and M.11, or B.II. Fliegerkompanie (FliK) 6 was one of the receiving units and was based here at Igalo in 1915. We believe that the stone bridge in the background still exists, next to the E65 road bridge. Photo from: Fortepan

Designed by Julius Berg and produced by the Austrian branch of the German Aviatik company, the D.I fighter was one of the better Austrian aircraft of WWI, although pilots preferred the Albatros D.III. Some 700 examples were built in 1917 and 1918. The Austro-Daimler engine was prone to overheating. Note the large radiator filler cap - it almost looks like a crafted mascot!

The D.1 was the first Austrian designed fighter to be built and this rare original was produced by Thöne & Viala in Vienna. It is now on display at the Personal Courage wing at the wonderful Museum of Flight.

1918-built original Aviatik D.1 aircraft. Later moved to the Museum of Flight at Seattle.