The Mercedes D.IVa was a German six-cylinder, water-cooled, inline engine developed in 1917 for use in aircraft and built by Daimler Motoren Gesellschaft (DMG).
Mercedes D.IVa
The AEG G.IV was a biplane bomber aircraft designed and produced by the German aircraft manufacturer Allgemeine Elektrizitäts-Gesellschaft. It saw action during the First World War with the Luftstreitkräfte.
AEG G.IV
A crashed AEG G.IV, 23 December 1917
A captured AEG G.IVk in British markings, Bickendorf, 1919
AEG G.IV at Canada Aviation and Space Museum