 Initially there were three trains on the Bergen Line in each direction per day , so only a single locomotive was necessary on the Flåm Line . From 1949 there were two locomotives on the Flåm Line and from 1955 all three were used there . Five passenger cars in aluminum were delivered by Strømmens Værksted . The cost of the three locomotives and five cars was NOK 2 @.@ 4 million . 
