Rumpler C.I
Entering service in 1915, the Rumpler C.I, (company designation 5A 2), two-seater single-engine reconnaissance biplane, was one of the first German C-type aircraft, and also one of the longest serving in its class during World War I, being retired from the last front line units only in early 1918. == Design and development == The C.I was a successful design, it was used on the Western and Eastern Fronts as well as in Macedonia, Salonika and Palestine.