Roco 7500006 electric locomotive Dm3, SJ, Ep. III-IV

Roco 7500006 electric locomotive Dm3, SJ, Ep. III-IV Product Details

Description

Immediately after the Second World War, the demand for Swedish iron ore increased dramatically. Suitable locomotives were needed to transport the heavy ore trains. The Swedish State Railways (SJ) ordered the first double locomotives of the Dm series, the first of which were delivered in 1953. Each of the two locomotive sections was equipped with a blind shaft drive and four coupled drive axles with spoked wheels. Five Dm locomotives were equipped with the newly developed "Motola 1960" spoke wheels in 1960/61. These powerful locomotives were able to haul ore trains of up to 3,200 tons over the challenging "Malmbana" Luleå-Kiruna-Narvik route. The heavy trains consisted of 52 ore wagons. Each of these 3-axle wagons had an empty weight of 20 tons and was loaded with 80 tons of ore. At the end of the 1960s, the train weights were increased to 5,000 tons. For this purpose, some machines were extended by an additional, driverless, four-axle center section and designated as Dm3.

Features:

• Gauge: H0
• Era: III-IV
• Railroad company: SJ
• Minimum radius: 358 mm
• Length over buffers: 405 mm
• Number of powered axles: 8
• Number of axles with traction tires: 3
• Power system: 2L direct current
• Motor: 5-pole motor
• Close-coupled locomotive parts
• High tractive effort due to two motors
• Headlights: Swedish light change
• Free-standing lines and grab irons
• Coupling: NEM 362 shaft with KK kinematics
• For the first time in original design with spoke wheels
• Interface: Electrical interface for PluX16 traction units