The Hansa-Brandenburg C.II, company designation K, (Luftfahrtruppen (LFT) series 66.5, 66.8 and 67.5), was a two-seat reconnaissance aircraft built in Germany by Hansa-Brandenburg in World War I, powered by Mercedes D.III or Hiero 6 water-cooled in-line piston engines.
[1] The C.II was derived from the earlier Brandenburg KDD prototype, (LFT serial 60.56), and two batches were ordered by the LFT, as the Mercedes D.III powered series 66.5 and Hiero 6 powered series 67.5., in 1916.
The 67.5 aircraft were re-serialled in the 66.8 range, but the production contract with Brandenburg was cancelled in November 1916, as the LFT and Austro-Hungarian air ministry preferred production by in-house companies like UFAG and Phönix, which, nevertheless, developed their own designs.
Unlike the KDD the C.II fuselage did not fill the interplane gap but the pilot was still sat under the centre-section with difficult ingress and egress, particularly in case of an accident.
After testing both prototypes were stored at Aspern until the Armistice and further development was abandoned due to the superiority of the Phönix C.I and UFAG C.I.