German Reichsbahn class 98¹⁰

In order to increase the top speed of the successful GtL 4/4 local locomotive, it was provided with a carrying axle. It was decided to attach this to the rear end of the locomotive and connect it to the last coupling axle using a Krauss-Helmholtz bogie. The boiler and cylinders remained unchanged compared to the GtL 4/4, but the supplies had been increased. The locomotives were unofficially called GtL 4/5, although according to the Reichsbahn scheme they became the class 98¹⁰.

In practice, the trailing axle was not entirely convincing, so the top speed could only be increased from 40 to 45 km/h. When production stopped, 45 had been produced. It was finally decided to equip the GtL 4/4 with a leading axle. The resulting class 98¹¹ could be approved for 55 km/h.