On the line between Heidelberg und Wiesloch one locomotive achieved a speed of 54 km/h (34 mph) with 20 wagons.
The locomotives had the same piston stroke as their English counterparts and were also equipped with a fork valve gear (Gabelsteuerung).
The engines had improved running gear however due to their adjustable leaf springs and centre axle box.
15, had a Meyer double rocker (Doppelschwing) valve gear, a larger cylinder bore of 381 mm, higher boiler pressure of 5.0 bar and 101 heating tubes.
On the foremost boiler section was the steam dome with a safety valve and spring balances.