[2] There was only a single aircraft completed of the refined C.Ia version in May 1916, with armament still in a forward cab, serving as a prototype for the C.III.

[1] The fuselage had a box-girder structure comprising four spruce longerons and members that were braced using stranded steel cables.

It had a rounded top decking that tapered towards the rear to form a vertical knife-edge while the forward end terminated in a sheet plate that was fretted with lightening holes.

Early-build C.Is had their radiators, however, the majority of aircraft were fitted with an improved Teeves and Braun-built unit that was mounted on the front of the center-section wing struts.

[7] The wings were rectangular, covered with fabric, and comprised all-wood construction except for the compression struts, which were made of steel tubing.

[7] A typical V-shaped undercarriage was used, the struts of which joined with a compact horizontal tube at its apex that functioned as the anchor point for a rubber chord that acted as a shock absorber.

[8] It was a refined C.I, having cleaned up nose contours, a redesigned exhaust manifold, a new aerofoil-style radiator and an enlarged spinner fitted to the propeller.