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Badenian IV h
German Reichsbahn class 183
Germany | 1918 | 20 produced
18 323 as a memorial in front of the University of Applied Sciences in Offenburg
18 323 as a memorial in front of the University of Applied Sciences in Offenburg
Peter Buck

The Grand Duchy of Baden State Railways used the IV f from 1907 on its 413 km long main line from Mannheim to Constance. However, this was unable to cope with long, fast routes with its driving wheels, which were only 1,800 mm large. Thus, in 1915, the IV h was ordered from Maffei in Munich, where the IV f and the S 3/6 had already been manufactured. Since only use on flat routes was planned, the IV h received driving wheels with a diameter of 2,100 mm. This negatively affected acceleration, but made it possible to maintain high speeds for a long time. The certification was only for 110 km/h, which was 10 km/h faster than its predecessor series. It was only in the thirties that it proved on test drives at speeds of up to 155 km/h that it ran very smoothly even at higher speeds. It was therefore equipped with more powerful brakes and approved for 140 km/h.

The locomotive was powered by a four-cylinder compound engine, which combined characteristics of the De Glehn and Von Borries types. The low-pressure cylinders drove the second coupled wheel set and had to be located on the outside due to their large diameter. While the outer high-pressure cylinders on the De Glehn type were pulled back to achieve shorter connecting rods, the outer cylinders were at the height of the smoke chamber. Thus, the high-pressure cylinders were on the inside and drove the first set of coupled wheels. Since they were also pulled very far forward, they could be clearly seen from the outside.

When they were taken over by the Reichsbahn, they became the class 183. After about ten years of service on the Baden trunk line, the 20 built IV h were replaced by class 01 standard locomotives and relocated to other locations. Although they had a higher fuel consumption than the newer locomotives, it later turned out that they could almost keep up with the 01 and even surpassed the 03 in terms of power. After all, the power measurements were in a range from 1,950 to 2,200 hp

Die Lokomotive, August 1925

After the war, all 19 remaining examples went to the Bundesbahn and only road number 18 314 ended up being traded for an S 3/6 to the Reichsbahn, where it was fundamentally rebuilt. All others were initially retired because their Number was very small. However, three were subsequently reactivated and modernized for use as brake locomotives or for other trials. The 18 316 was preserved and was again in running condition between 1995 and 2002, but was parked again after damage.

Variantas builtimproved running gear
General
Built1918-1920
ManufacturerMaffei
Axle config4-6-2 (Pacific) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length76 ft 2 9/16 in
Wheelbase40 ft 4 5/8 in
Fixed wheelbase14 ft 3 5/8 in
Total wheelbase64 ft 4 5/8 in
Empty weight192,133 lbs
Service weight211,644 lbs
Adhesive weight119,049 lbs
Total weight350,535 lbs
Axle load39,683 lbs
Water capacity7,819 us gal
Fuel capacity19,842 lbs (coal)
Power
Power sourcesteam
Indicated power2,172 hp (1,620 kW)
Optimal speed51 mph
Top speed68 mph87 mph
Starting effort27,026 lbf
with start valve32,431 lbf
Power Plant
Driver diameter82.7 in
Boiler pressure232 psi
Expansion typecompound
Cylindersfour, HP: 17 5/16 x 26 3/4 in
and LP: 26 3/4 x 26 3/4 in
Boiler
Grate area53.8 sq ft
Firebox area167.9 sq ft
Tube heating area2,251.8 sq ft
Evaporative heating area2,419.7 sq ft
Superheater area835.3 sq ft
Total heating area3,255 sq ft
Calculated Values
steam locomotive
express
two-axle compound
last changed: 01/2022
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