[1][4] An order of 40 engines of this type, destined for the Lohner B.V and B.VI training aircraft,[5] was placed by the Austro-Hungarian Armed Forces around the turn of the year 1915/16.

[6] A few engines were also sold to the Bavarian Army, where they were installed on training aircraft, but were plagued with recurrent carburettor fires and soon removed from service.

Each cylinder's exhaust and inlet valves were actuated successively from a single cam lobe on the overhead camshaft via roller tappets and rocker arms.

Instead of a relatively flat base it had a tapered design, with the oil pump installed on the lowest point.

In order to circulate the engine coolant separate geared water pumps were installed on the respective side of the crankcase for each cylinder row.