An engine developed by Robert Conrad and produced by Nationale Automobil Gesellschaft mbH in Berlin. It employed technical solutions similar to those found in Mercedes engines. The engine was produced in small numbers. It was used in the DFW C.Vc and Fokker D.VII aircraft.
Archival materials:
| Configuration | 6-cylinder inline |
| Cooling | water |
| Compression ratio | 4.8 |
| Displacement | 17.051 l |
| Weight | 270 kg |
| Maximum power | 210 hp at 1400 rpm |
