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Hungarian State Railways series 242
Hungary | 1936 | 4 produced

Since the expected number of passengers in express traffic in the 1930s was low and the existing tracks did not allow high axle loads anyway, the Hungarian State Railways developed a light streamlined tank locomotive. With one bogie in front and one behind, the four locomotives were allowed to travel 120 km/h in both directions. A speed of 152 km/h was reached during a test drive and in 1961, after the installation of a double blast pipe, even 160 km/h were reached. As with German streamlined locomotives, the panels were later cut out in the area of the wheels.

General
Built1936, 1940
ManufacturerMÁVAG
Axle config4-4-4T (Reading) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length46 ft 10 in
Wheelbase35 ft 8 9/16 in
Fixed wheelbase7 ft 2 in
Empty weight144,286 lbs
Service weight188,164 lbs
Adhesive weight64,463 lbs
Axle load32,375 lbs
Water capacity2,642 us gal
Fuel capacity9,921 lbs (coal)
Power
Power sourcesteam
Estimated power1,475 hp (1,100 kW)
Optimal speed45 mph
Top speed75 mph
Starting effort20,672 lbf
Power Plant
Driver diameter78.7 in
Boiler pressure261 psi
Expansion typesimple
Cylinderstwo, 16 15/16 x 25 9/16 in
Boiler
Grate area29.6 sq ft
Firebox area133.5 sq ft
Tube heating area1,160.3 sq ft
Evaporative heating area1,293.8 sq ft
Superheater area462.8 sq ft
Total heating area1,756.7 sq ft
Calculated Values
steam locomotive
express
streamline
tank locomotive
last changed: 03/2022
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