Moottorivaunut 48-55 (4-aks)

The car coaches were built on the Valmet airplane factory on the model of Swiss standard cars. Their designs were altered by the tramway chief Pentti Savolainen, the cars were shortened and they got no middle doors. The Tampella bogies and Strömberg electrics were the same as in Helsinki cars type RM1 (1956) and RM3 (1959). The cars run silently and smoothly because of the bogies and rubber dampened wheels, and thus got the nickname ”aavevaunu”, ”ghost car”. They had much better acceleration and retardation than two-axle cars and they had official top speed at 50 km/h. They were designed for use on light rail lines, and in tests reached speeds up to 90 km/h. They had seating 1 + 1 for very high standee capacity. The cars were used in 1956 for a short time on line 3 but were too long to meet on certain curves on the line. After this they were mostly used on line 1 until its abandonment 1967 and then on the line 2 until its abandonment in June 1972. The car no 48 had Scharfenberg couplings for the trailer 141 1958-1968, the others ordinary trailer couplings. The cars were considered as modern, silent and fast, but there were more technical problems than with the series 38-47. The cars 52, 53 and 55 were preserved after abandonment by different societies, but they were scrapped in 1970’s and 1980’s as they had been totally vandalized standing outdoors.