The Wehrmacht locomotive that stood out alongside its sisters with 200 and 360 hp was the WR 220. It was ordered by the Luftwaffe and, unlike the others, had mechanical power transmission. There was a two- and a three-axle variant, designated WR 220 B and WR 220 C, respectively. The two-axle had an wheelbase of 2.90 meters and the jackshaft was located between the axles. With the three-axle, the overall wheelbase was only five centimeters longer and the jackshaft was in the narrower space between the second and third axles. The wheel diameter was five centimeters smaller here, but whether this was only chosen to accommodate the third axle or for other reasons can only be guessed at. Compared to the WR 220, both were slightly shorter and had a larger cab.
After the war, the Bundesbahn took over nine two-axle and five three-axle vehicles, which were classified as V 22 according to their output. Since these locomotives differed from the V 20, which was available in large numbers, an adaptation was sought. This was implemented on all two-axle vehicles between 1951 and 1953 by installing a new engine and hydraulic transmission. In 1968, these were even given computer numbers with the class 270 and were used from then on for about ten years. One of the three-axle locomotives was converted to two axles. However, since this apparently did not deliver satisfactory results, the other three-axle vehicles were retired until 1951.
