loco-info.com - Imperial-Royal Army Railway class VI and Railways of the Kingdom of the Serbs, Croatians and Slovenes class VIc7

No. 14331 from the second batch delivered as reparations

Henschel Museum e.V. Public Domain

In World War I, Henschel designed a Mallet tender locomotive for use by the Austro-Hungarian field railways in Serbia. 20 were to be delivered to Serbia, but by the end of the war only 19 had been completed. In 1930, Henschel built 30 more as war reparations. They were called class VIc7 by the railway of the SHS state and the Yugoslavian State Railways. In 1933, the JDŽ renumbered them to class 92. Their dominion was the heavy coal and ore traffic on the winding and steep narrow gauge lines. In 1970, the last few locomotives were still in service. Today only 92-043 is being preserved in the Požega museum.

General
Built	1918, 1922
Manufacturer	Henschel
Axle config	2-6-6-0
Gauge	2 ft 5 15/16 in (Bosnian gauge)

Dimensions and Weights
Length	59 ft 3 1/4 in
Wheelbase	25 ft 7 1/16 in
Rigid wheelbase	6 ft 6 3/4 in
Empty weight	110,231 lbs
Service weight	121,254 lbs
Adhesive weight	105,822 lbs
Total weight	194,007 lbs
Axle load	17,637 lbs
Water capacity	3,963 us gal
Fuel capacity	11,023 lbs (coal)

Boiler
Grate area	32.3 sq ft
Firebox area	104.4 sq ft
Tube heating area	969.2 sq ft
Evaporative heating area	1,073.6 sq ft
Superheater area	290.7 sq ft
Total heating area	1,364.3 sq ft

Power Plant
Driver diameter	31.5 in
Boiler pressure	203 psi
Expansion type	compound
Cylinders	four, HP: 14 3/16 x 15 3/4 in and LP: 22 1/16 x 15 3/4 in

Power
Power source	steam
Estimated power	1,006 hp (750 kW)
Top speed	19 mph
Starting effort	24,537 lbf
with start valve	29,444 lbf

Calculated Values
Factor of adhesion	1 : 3.60
Optimal speed	26 mph
Power-to-weight ratio	0.0083 hp/lb
Heating Area Equivalent	2,177.1 sq ft
Cylinder volume/HAE	1 : 889.70
Adhesive weight/Total	1 : 1.15
Tractive force/Heating area	1 : 4851.75
Grate area/Heating area	1 : 39.02
Firebox/Tube area	1 : 12.07
Total/Superheater	1 : 3.69
HP/LP cylinders	1 : 2.42

steam locomotive

freight

Mallet

military railway

narrow gauge

last changed: 11/2024

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