NSB Class 49

The vehicles of the NSB Type 49 had a Tender locomotive of the Norwegian State Railways Norges Statsbaner (NSB ) for the heavy express train service. She was the most powerful and largest steam locomotive of the NSB. Seven units were built in 1935-1941. The last were retired in 1958. One of the locomotives on the main field of application, leading over the Dovre Dovrebahn as Dovregubben ( Dovreriese ) referred to has been retained in Norsk Jernbanemuseum Hamar.

History

The increasing weights of about since 1921 throughout finished Dovrebahn trains running express trains introduced in the early 1930s to the decision of the NSB to develop a new heavy express locomotive for these trains. You should stringing the trains especially on the steeply graded and winding section between Otta and Trondheim. Prior to this, especially a high towing capacity was required, high speeds were not required for this route. The required speed was therefore fixed at 90 km / h on a relatively low value for express locomotives and locomotive designed as a four-cylinder compound locomotive.

As it was, in principle, to small series, which served to test, differences were present between the individual models. This resulted in a classification into different sub- series result.

Type 49a

According to the draft of Olaf Storsand, engineering director of the NSB, the Norwegian manufacturer supplied Thune and Hamar first on June 7, 1935, and on September 10, 1935, a copy of which have been designated as 49a 463 and 464 and a few days after delivery in the operation of service were taken.

Type 49b

Of the same suppliers Hamar & Thune a single piece was delivered on March 14, 1936, the disposal below the cab a switchable booster bogie and the number 49b 465 received.

Type 49c

On July 28, 1938 four further locomotives were ordered. On August 23, 1940, the delivery of two copies by the German manufacturer Krupp in Essen takes place ( 49c 470 and 471 ) and in 1941 two more locomotives of Thunes Mekaniske verksted ( 49c 472 and 473 ). A further seven pieces were ordered from Krupp, but fell in the unfinished state of bomb attacks on the Essen plant victim. Four specimens had been given at the domestic industry in Norway in order, but after wartime delays were ultimately not completed. The attached and parts were used as spare parts.

One of the locomotives built by Krupp in 1940 subjected by the Locomotive Experimental Bureau Grunewald extensive test drives. It proved to be very successful, the then head of the experiment Office described it as " the most fuel-efficient compound locomotive " that have ever examined the office. Used an experimental basis before a fast train from Berlin to Wroclaw, the locomotive was able to keep the DR series 01 and 120 km / h designed journey times thanks to its very good acceleration performance despite the lower top speed easily.

Use

The NSB put all seven copies as planned a particularly on the Dovrebahn against heavy express trains. However, the composite technology caused additional maintenance work and proved to be complicated. The machine 49a 464 was therefore already parked on 17th September 1953 but retired before June 20, 1958. After purchasing the new diesel locomotives NSB Di 3 all others were taken between February 4 and September 4, 1957 out of service and decommissioned on 16 December 1958.

Whereabouts

The built at Krupp No. 470 remained preserved in museums. It is available as inoperable museum exhibits in Norsk Jernbanemuseum Hamar.