Krupp 28cm L/76 K5 (E)

Krupp 28cm L / 76 K.5 (E) railway gun was developed by Krupp between 1934-1936, and entered service in 1940. It was a completely new design that made it the best German railway gun of the Second World War. The German troops knew him as “Schlanke Bertha”, (Slim Bertha), or the “hack weapon”. Each K.5 (E) was transported in two separate trains, one called the “gun train” and another named as the “turntable train”, each with specific parts of the gun and the gun carriage respectively. There were plans to make the K.5 (E) transported by land outside the railway network. For this, the piece would be divided into 3 autonomous sections of 130 tonnes each towed by 2 tracked tractors based on Kingtiger tanks. The project was called “K.5 Eisenbahn Runden Feld”, but the plans were never finished.

28cm L/76 K5 (E) gallery and more info


Información adicional

Ficha Completa
Country of origin





Railway gun

Entered service


Combat weight

218,000 kg

Dimensions (length x width x height)

41.23 meters (length overall) – 21.53 meters (barrel length)


1 x 283/76.1mm gun


226 shells per gun in two wagons

Rate of fire, (maximum)

15 shells per hour

Shell weight

HE: 255 kg – HE Rocket assisted RGr.4331: 248 kg

Shell range

59 km – 86.50 km with rocket assisted shell

Muzzle velocity

1,120 m/s


25 complete guns