AB Stockholms Spårvägar class B4 no 928-938

© Anders Wirén

data for the class B4 "jitterbugg"
Vehicle:  trailer car 
Company:  AB Stockholms Spårvägar (SS) 
Town:  Stockholm 
Class:  B4  "jitterbugg"
Car number:  928-938 
Built number:  11 
Manufacturer:  Råsunda 1943-1944 
Gauage (mm):  1435 
Length (mm):  11350 
Width (mm):  2200 
Height (mm):  2200 
Weight (kg):  9800 
Axel arrangement: 
Wheelbase (mm):  2700 
Boggie center base (mm):   
Wheel diameter (mm):  850 
Wheel tread width (mm):
Type of motor:
Motor power (kW):   
Type of controller:
Type of coupling:
Operating current:   
Max speed (km/h):   
Door arrangement:
Number of passengers:  24 seating + 48 standing = 72 passengers 
Out of service:  utrangerade 
Note:  "Jitterbugg" fd B20 

The history of the class (only in Swedish):
"Jitterbugg" ombyggda från B20, före 1949 littera B2.