The BR52 was known as the Kriegslok or War Locomotive & was manufactured in vast numbers between 1942 & 1944. Over 6000 BR52s came out of the locomotive works of Germany in World War Two.
The engine combined a 2-10-0 configuration with either tub or box-type tenders. The later tenders could carry 30 cubic metres of water & 8 tons of coal. It had a top speed of 55 miles per hour (80km/h).
The 52 series was the result of what we would call today an UOR or Urgent Operational Requirement as the war effort desperately needed more pulling power. During the first Russian winter, the German supply chain almost collapsed as many existing designs couldnt cope with demand & the bitter cold. So, having been rushed through in 1942, the first Kriegslok loco was built in September.
Behind it all lay the concept of standardization, so the BR52 took the design of the BR50, improved it, simplified it & then laid down a universal template for all new locomotives designed for war work.
It was not just in the design that standardization was the mantra, fewer parts, raw materials & crucially man hours, were needed to get a BR52 out of the door. One factory in 1943 managed to produce 500 in one month.