Aviatik (Berg) 30.27&29

Contrary to other designs from Julius von Berg where inline engines were used, both Aviatik 30.27 and the similar 30.29 which appeared in early 1918 employed a 160hp Steyr LeRhône rotary engine which was a copy of the French one.
It was made out of wood with plywood fuselage skinning, a light metal forward section and fabric-covered wings. They were armed with the typical Austrian 8mm Schwarzlose 07/12 machine guns and initally they were equipped with two-bladed propellers. As the original cowling left the three cylinders exposed, it was replaced by a full ring cowling and the four bladed Jaray propeller was installed. Both 30.27 and 30.29 took part in the D-Type contest that was hold on July 1918 and the 30.29 crashed when the upper wing leading edge collapsed when the pilot started to perform a loop.

Sources:
1. Salamander Books - The Complete Book of Fighters
2. http://www.wwiaviation.com/popup/Aviatik-Berg-30-27-1918.html
3. http://www.airwar.ru/enc/fww1/aviatik302729.html (translated)