The wheel arrangement 2-4-0 designates a steam locomotive with one leading axle and two coupled axles. This design was manufactured over a very long period of time and was used equally on goods, passenger and express trains. In different countries, this wheel arrangement is referred to as follows:
Goods locomotive of the KFNB of the series from “Tiberius” to “Pilades” with an overhanging firebox, built from 1856
Porter, Old EnglishUIC1BWhyte2-4-0Switzerland2/3France120Turkey23
The Clyde class of the LSWR, with seven-foot drivers, was one of the first really successful express engines with 2-4-0 wheel arrangement
Locomotive Magazine, December 1903
The locomotives of this type were created by adding another coupled axle to the 2-2-0 wheel arrangement. They were characterized by significantly better traction and, thanks to the additional axle, could also carry a larger boiler. In order to be able to negotiate curves, the first coupled axle was usually manufactured without wheel flanges. They first engines came into circulation around 1840 for service with goods trains with relatively small coupled wheels.
The Prussian P 31 was built until 1907 and was one of the last 2-4-0 locomotives for passenger trains on main lines
The leading axle, which was still present, provided sufficient guidance when entering curves at track speed. In the beginning, the firebox of the very long and thin boiler was often still behind the rear driving axle, which is also called “overhanging firebox” and tended to lead to rather unsteady running. Soon only the design with a “supported firebox” was being built, with the firebox located between the coupled wheels. Since now there were no heavy masses behind the last axle, this improved running properties at high speeds.
Over the years, engine appeared that had larger wheels and could also be used to pull passenger trains. In Great Britain in particular, the variant with the leading axle fixed in the frame was able to prove itself at higher speeds, since the tracks there were laid with great care. In addition, inside cylinders were almost always installed, which were located behind the leading axle and thus hardly transmitted any disturbing movements to the rails. Joseph Beattie began to introduce express locomotives with the LNWR in 1859, such as the Clyde class, which had seven inch wheels and hauled the heaviest and fastest express trains up until the 1870s.
In the 1890s, a large number of locomotives with a 2-4-0 wheel arrangement were still being built, but now almost exclusively for passenger and express trains. Above all, Great Britain was still ahead, because there the rather light trains had to achieve high speeds. The situation was completely different in the USA, where the 4-4-0 “American” was quickly adopted due to the mostly cheaper layout of the superstructure. For this reason, the locomotives described here were rarely found on standard-gauge main routes, but mostly only on narrow-gauge railways or in industrial companies. Since most of these locomotives were delivered by H.K. Porter, the name “Porter” for the wheel arrangement 2-4-0 became established in the US naming system.
Only in a few cases the leading axle mounted to be moved radially, which meant that the wheel arrangement was designated as 1'B in UIC notation to distinguish it. This type of construction was used so rarely because stable running behavior can only be guaranteed if the running axle is being returned to the central position with sufficient force. The few examples include the Bavarian B X and the Saxon IIIb V and VIb V.
The Altenburg-Zeitz railway company was founded in 1870 in the Duchy of Saxony-Altenburg to transport lignite from the Meuselwitz-Rositz mining area. In addition to transporting the lignite, passenger transport and other freight transport also had to be handled. For this reason, locomotives had to be procured that could handle both freight and passenger transport for the small company.
The five locomotives purchased by Borsig for this purpose had 1,525 mm coupling wheels and a leading axle mounted fixed in the frame. Other features included inside valve gear and a rudimentary cab. Between 1880 and 1888, five more tank and tender locomotives were procured. When the Altenburg-Zeitz railway company was nationalized in 1896, all machines were taken over. The numbers 1 to 5 were classified in the Saxon type II and provided with the numbers 745 to 749. The last three units survived until 1922 and were not given new numbers by the Reichsbahn.
General |
Built | 1872, 1875 |
Manufacturer | Borsig |
Axle config | 2-4-0 (Porter) |
Gauge | 4 ft 8 1/2 in (Standard gauge) |
Dimensions and Weights |
Length | 46 ft 7 1/4 in |
Wheelbase | 10 ft 9 1/2 in |
Rigid wheelbase | 10 ft 9 1/2 in |
Empty weight | 65,036 lbs |
Service weight | 73,855 lbs |
Adhesive weight | 53,793 lbs |
Axle load | 26,896 lbs |
Fuel capacity | coal |
Boiler |
Grate area | 16.1 sq ft |
Firebox area | 78.6 sq ft |
Tube heating area | 1,127 sq ft |
Evaporative heating area | 1,205.6 sq ft |
Total heating area | 1,205.6 sq ft |
Power Plant |
Driver diameter | 60 in |
Boiler pressure | 123 psi |
Expansion type | simple |
Cylinders | two, 17 x 22 1/16 in |
Power |
Power source | steam |
Estimated power | 369 hp (275 kW) |
Optimal speed | 21 mph |
Starting effort | 11,133 lbf |
Calculated Values |
Factor of adhesion | 1 : 4.83 |
Power-to-weight ratio | 0.0050 hp/lb |
Heating Area Equivalent | 1,598.4 sq ft |
Cylinder volume/HAE | 1 : 1105.48 |
Adhesive weight/Total | 1 : 1.37 |
Tractive force/Heating area | 1 : 2076.05 |
Grate area/Heating area | 1 : 69.80 |
Firebox/Tube area | 1 : 14.34 |
The locomotives of type XI were four-coupled tender locomotives with a leading axle for freight train service, which were procured from 1860 by the Grand Duchy of Baden State Railways. They were characterized by relatively large wheels, which allowed them to be used in front of passenger trains if necessary. From 1868 it was called V a.
The locomotives were equipped with a Crampton boiler, which protruded beyond the first and last axle. Initially, the saturated steam was only extracted from a regulator attachment directly on the upper edge of the boiler, which at times led to water being fed into the cylinders. Thus, all engines of the later deliveries received a steam dome.
The wheel sets were mounted within an outer frame, so the power was transmitted via Hall cranks to the first coupled axle. With a driving wheel diameter of 1,524 mm it was ensured that at the top speed of 40 km/h low rotational speeds and smooth running were still guaranteed. The leading axle was rigidly mounted, but in view of the short overall wheelbase and the low speeds, this did not entail any particular disadvantages.
The primary operational areas of the XI were the Baden main line from Mannheim to Constance and the Odenwald line, which branched off from the main line in the direction of Würzburg. In addition to shunting services in the port of Mannheim, the deployment increasingly shifted to secondary routes with the commissioning of more powerful engines, where they benefited above all from the low axle load. In the mid-1890s, the remaining 18 of the 22 examples were withdrawn within a short period of time. One of them was converted into a tank locomotive in 1875, but it was to remain a one-off.
General |
Built | 1860-1863 |
Manufacturer | MBG Karlsruhe |
Axle config | 2-4-0 (Porter) |
Gauge | 4 ft 8 1/2 in (Standard gauge) |
Dimensions and Weights |
Length | 42 ft 9 11/16 in |
Wheelbase | 11 ft 3 13/16 in |
Rigid wheelbase | 11 ft 3 13/16 in |
Empty weight | 59,525 lbs |
Service weight | 67,241 lbs |
Adhesive weight | 46,297 lbs |
Axle load | 23,149 lbs |
Water capacity | 1,485 us gal |
Fuel capacity | coal |
Boiler |
Grate area | 10.4 sq ft |
Firebox area | 60.7 sq ft |
Tube heating area | 1,012.9 sq ft |
Evaporative heating area | 1,073.6 sq ft |
Total heating area | 1,073.6 sq ft |
Power Plant |
Driver diameter | 60 in |
Boiler pressure | 116 psi |
Expansion type | simple |
Cylinders | two, 16 x 24 in |
Power |
Power source | steam |
Estimated power | 168 hp (125 kW) |
Optimal speed | 11 mph |
Top speed | 25 mph |
Starting effort | 10,083 lbf |
Calculated Values |
Factor of adhesion | 1 : 4.59 |
Power-to-weight ratio | 0.0025 hp/lb |
Heating Area Equivalent | 1,377.1 sq ft |
Cylinder volume/HAE | 1 : 1234.51 |
Adhesive weight/Total | 1 : 1.45 |
Tractive force/Heating area | 1 : 2111.37 |
Grate area/Heating area | 1 : 97.01 |
Firebox/Tube area | 1 : 16.68 |
Since the locomotives from the early days were no longer powerful enough, newer ones with an 2-4-0 wheel arrangement were procured from Maffei in Munich. 20 of these were delivered from 1873 and were based on the Bavarian locomotives. It is noteworthy that from 1888 all of them were converted to tank locomotives with an 2-4-2T wheel arrangement and remained in use as such.
In order to increase the output, following the trend of the time, the grate area was enlarged without significantly increasing the dimensions of the boiler. A further increase in power was achieved through a higher boiler pressure, which had become possible due to new materials and production techniques. The locomotives had an external frame and external cylinders, but internal Stephenson-type valve gear. Braking, as was usual at the time, was done with mechanical transmission only to the wheels of the locomotive.
After a few years of operation, it became apparent that the adhesive weight was too low and the running characteristics with the long rear overhang were no longer up to date. Therefore, the locomotives were equipped with a trailing axle and turned into tank locomotives, while most parts remained the same. Because the weight of the boiler feed water was now acting on the couple axles, the adhesive weight increased. In addition, more powerful boilers of the Baden type were used later and the brakes were replaced with a modern air brake system of the Westinghouse type.
The conversion was completed on all locomotives in 1892 and extended their operating life beyond what the original tender locomotives would have achieved. The decommissioning began in 1901, the last locomotive was taken out of service in 1910.
Variant | as built | rebuilt tank locomotive |
---|
General |
Built | 1873-1874 | 1888-1892 |
Manufacturer | Maffei |
Axle config | 2-4-0 (Porter) | 2-4-2T (Columbia) |
Gauge | 4 ft 8 1/2 in (Standard gauge) |
Dimensions and Weights |
Length | 46 ft 11 in | 34 ft 4 11/16 in |
Wheelbase | 11 ft 2 1/16 in | 17 ft 0 3/4 in |
Rigid wheelbase | 11 ft 2 1/16 in | |
Empty weight | 63,493 lbs | |
Service weight | 72,752 lbs | 118,829 lbs |
Adhesive weight | 48,502 lbs | 60,407 lbs |
Axle load | 24,251 lbs | 30,203 lbs |
Water capacity | 1,783 us gal | 1,585 us gal |
Fuel capacity | coal | 6,614 lbs (coal) |
Boiler |
Grate area | 16.5 sq ft |
Firebox area | 73.7 sq ft |
Tube heating area | 1,093.1 sq ft |
Evaporative heating area | 1,166.8 sq ft |
Total heating area | 1,166.8 sq ft |
Power Plant |
Driver diameter | 65.9 in |
Boiler pressure | 130 psi |
Expansion type | simple |
Cylinders | two, 17 1/8 x 24 in |
Power |
Power source | steam |
Estimated power | 369 hp (275 kW) |
Optimal speed | 20 mph |
Top speed | 37 mph |
Starting effort | 11,848 lbf |
Calculated Values |
Factor of adhesion | 1 : 4.10 | 1 : 5.10 |
Power-to-weight ratio | 0.0051 hp/lb | 0.0031 hp/lb |
Heating Area Equivalent | 1,535.5 sq ft |
Cylinder volume/HAE | 1 : 1271.03 |
Adhesive weight/Total | 1 : 1.50 | 1 : 1.97 |
Tractive force/Heating area | 1 : 2282.76 |
Grate area/Heating area | 1 : 66.37 |
Firebox/Tube area | 1 : 14.82 |
In 1869 and 1870, some locomotives with the wheel arrangements 2-2-2 and 4-2-0 (Crampton) were converted into four-coupled ones in order to increase the tractive effort for the increased loads in express traffic. Four locomotives with 0-4-2 wheel arrangement were then ordered and assigned to class B IX, but soon sold to the Reichseisenbahnen Alsace-Lorraine. Finally, in 1874, Maffei began to manufacture the new B IX, which had a 2-4-0 wheel arrangement and was thus the first four-coupled express locomotive in Bavaria to be procured in series.
Since at that time engineers had already come to the realization that overhanging masses impair the running properties at high speeds, attempts were made to reduce them as much as possible. With the B VIII, which was built in small numbers, experience had already been gained with a firebox whose center of gravity was directly above the second coupled axle, and this feature was adopted with the B IX. In order to also minimize the front overhangs, the cylinders were moved as close as possible to the leading axle. Like the previous series, the B IX had an outer frame, internal Stephenson valve gear and external cylinders. Due to its smooth running, it could be approved for 90 km/h and, with a train weight of 150 tonnes, reached a speed of 70 km/h on the flat.
A total of 104 engines were made between 1874 and 1887. After the end of the First World War, they were no longer used in high-value express service, but the remaining units with the numbers 34 7421 to 34 7440 were included in the Reichsbahn's provisional renumbering plan. However, the new numbers did not need to be attached, since the last machines were retired in 1925. Today, the locomotive with the number 1000 can be viewed as a cutaway model in the Lokwelt Freilassing, a branch of the Deutsches Museum in Munich.
General |
Built | 1874-1887 |
Manufacturer | Maffei |
Axle config | 2-4-0 (Porter) |
Gauge | 4 ft 8 1/2 in (Standard gauge) |
Dimensions and Weights |
Length | 45 ft 9 5/8 in |
Service weight | 74,075 lbs |
Adhesive weight | 48,502 lbs |
Axle load | 25,574 lbs |
Water capacity | 2,774 us gal |
Fuel capacity | 11,023 lbs (coal) |
Boiler |
Grate area | 16.1 sq ft |
Evaporative heating area | 952.6 sq ft |
Total heating area | 952.6 sq ft |
Power Plant |
Driver diameter | 73.6 in |
Boiler pressure | 145 psi |
Expansion type | simple |
Cylinders | two, 16 x 24 in |
Power |
Power source | steam |
Estimated power | 402 hp (300 kW) |
Optimal speed | 25 mph |
Top speed | 56 mph |
Starting effort | 10,272 lbf |
Calculated Values |
Factor of adhesion | 1 : 4.72 |
Power-to-weight ratio | 0.0054 hp/lb |
Adhesive weight/Total | 1 : 1.53 |
Tractive force/Heating area | 1 : 2424.13 |
Starting in 1863, Sharp, Stewart & Co. not only delivered some goods locomotives with a 0-6-0 wheel arrangement to the newly founded Cambrian Railways, but also twelve locomotives with a 2-4-0 wheel arrangement. The driving wheels were not particularly large at 66 inches, but they were used for passenger and express trains. Although relatively small for their time and not particularly fast, the engines were richly decorated with large amounts of brass. From 1890 they were fitted with a new boiler and a driver's cab. Two locomotives were converted to tank locomotives from 1908.
General |
Built | 1863-1864 | 1890 |
Manufacturer | Sharp, Stewart & Co. | Cambrian |
Axle config | 2-4-0 (Porter) |
Gauge | 4 ft 8 1/2 in (Standard gauge) |
Dimensions and Weights |
Wheelbase | 14 ft 3 in |
Rigid wheelbase | 7 ft 9 in |
Service weight | 55,552 lbs | 60,480 lbs |
Adhesive weight | 37,250 lbs | 40,880 lbs |
Total weight | 104,272 lbs | 109,200 lbs |
Axle load | 21,168 lbs | 22,400 lbs |
Water capacity | 1,441 us gal |
Fuel capacity | 6,720 lbs (coal) |
Boiler |
Grate area | 11.6 sq ft |
Firebox area | 71.4 sq ft |
Tube heating area | 843.6 sq ft | 893.6 sq ft |
Evaporative heating area | 915 sq ft | 965 sq ft |
Total heating area | 915 sq ft | 965 sq ft |
Power Plant |
Driver diameter | 66 in |
Boiler pressure | 120 psi | 150 psi |
Expansion type | simple |
Cylinders | two, 16 x 20 in |
Power |
Power source | steam |
Estimated power | 200 hp (149 kW) | 250 hp (186 kW) |
Optimal speed | 16 mph |
Starting effort | 7,913 lbf | 9,891 lbf |
Calculated Values |
Factor of adhesion | 1 : 4.71 | 1 : 4.13 |
Power-to-weight ratio | 0.0036 hp/lb | 0.0041 hp/lb |
Heating Area Equivalent | 1,272 sq ft | 1,322 sq ft |
Cylinder volume/HAE | 1 : 1115.27 | 1 : 1073.09 |
Adhesive weight/Total | 1 : 1.49 | 1 : 1.48 |
Tractive force/Heating area | 1 : 1944.17 | 1 : 2304.22 |
Grate area/Heating area | 1 : 72.70 | 1 : 77.01 |
Firebox/Tube area | 1 : 11.82 | 1 : 12.52 |
Due to an urgent need for locomotives, the Alsace–Lorraine Imperial Railways turned to other manufacturers in 1874. So they ordered 16 2-4-0 passenger locomotives from Kitson at Leeds and 26 from Esslingen. Originally, the British locomotives were designated A 8 and the German locomotives were designated A 9. In the system introduced in 1906, they were renamed P 2.
They had a raised Belpaire firebox, a huge steam dome and a capuchon chimney with a lip on the forward edge. Originally they only had a Ricour type steam brake, but got air brakes later. Despite a driver diameter of only 5 ft 9 in (1,752 mm), they were also used in express service. Their withdrawals started in World War I and were completed by 1920.
General |
Built | 1874 |
Manufacturer | Kitson & Co., Esslingen |
Axle config | 2-4-0 (Porter) |
Gauge | 4 ft 8 1/2 in (Standard gauge) |
Dimensions and Weights |
Wheelbase | 14 ft 5 1/4 in |
Rigid wheelbase | 14 ft 5 1/4 in |
Service weight | 85,319 lbs |
Adhesive weight | 55,997 lbs |
Axle load | 27,999 lbs |
Water capacity | 2,510 us gal |
Fuel capacity | coal |
Boiler |
Grate area | 15.7 sq ft |
Evaporative heating area | 1,105 sq ft |
Total heating area | 1,105 sq ft |
Power Plant |
Driver diameter | 69 in |
Boiler pressure | 145 psi |
Expansion type | simple |
Cylinders | two, 16 15/16 x 22 11/16 in |
Power |
Power source | steam |
Estimated power | 402 hp (300 kW) |
Optimal speed | 22 mph |
Top speed | 53 mph |
Starting effort | 11,613 lbf |
Calculated Values |
Factor of adhesion | 1 : 4.82 |
Power-to-weight ratio | 0.0047 hp/lb |
Adhesive weight/Total | 1 : 1.52 |
Tractive force/Heating area | 1 : 2362.58 |
From 1870, the Nord procured 2-4-0 express locomotives from André Koechlin with a driving wheel diameter of 2,100 mm or 6 ft 10 5/8 in. The leading axle could be shifted laterally by 10 mm. The frame was a double one with cylinders and valve gear on the inside and coupling rods with cranks on the outside. The nickname “Outrance” apparently came from the fact that the machines could be used “to the utmost” due to their durable design.
The initially installed boiler had a firebox with a round top, which lay between the driving axles. From 1877 a larger boiler was used, which had a Belpaire firebox that extended beyond the second driving axle. In addition, the boiler pressure was now 10 instead of 8.5 bars. To carry the extra weight, the leading axle was replaced with a bogie.
No. 632, later 2.822, in original condition as 2-4-0
Die Lokomotive, June 1936
The last batch, twelve of which were built in 1884 and 1885, again had only one leading axle, which was now radially adjustable. Between 1890 and 1898, all locomotives that still had a leading axle were rebuilt to a 4-4-0 wheel arrangement and fitted with the new boiler. Some received cylinders with a diameter of 460 mm and were called “Outrances renforcées”.
General |
Built | 1870-1885 | 1877-1879, 1890-1898 |
Manufacturer | Koechlin, SACM |
Axle config | 2-4-0 (Porter) | 4-4-0 (American) |
Gauge | 4 ft 8 1/2 in (Standard gauge) |
Dimensions and Weights |
Wheelbase | 18 ft 0 9/16 in | 20 ft 8 13/16 in |
Rigid wheelbase | 18 ft 0 9/16 in | 8 ft 5 15/16 in |
Empty weight | 72,422 lbs | 87,744 lbs |
Service weight | 79,036 lbs | 94,799 lbs |
Adhesive weight | 55,887 lbs | 63,052 lbs |
Axle load | 28,991 lbs | 31,526 lbs |
Water capacity | 2,113 us gal | 3,698 us gal |
Fuel capacity | 6,614 lbs (coal) | 8,818 lbs (coal) |
Boiler |
Grate area | 18.8 sq ft | 24.9 sq ft |
Firebox area | 101.2 sq ft | 94.2 sq ft |
Tube heating area | 883.4 sq ft | 975.2 sq ft |
Evaporative heating area | 984.6 sq ft | 1,069.4 sq ft |
Total heating area | 984.6 sq ft | 1,069.4 sq ft |
Power Plant |
Driver diameter | 82.7 in |
Boiler pressure | 123 psi | 145 psi |
Expansion type | simple |
Cylinders | two, 17 x 24 in |
Power |
Power source | steam |
Estimated power | 335 hp (250 kW) | 536 hp (400 kW) |
Optimal speed | 24 mph | 33 mph |
Top speed | 75 mph |
Starting effort | 8,807 lbf | 10,356 lbf |
Calculated Values |
Factor of adhesion | 1 : 6.35 | 1 : 6.09 |
Power-to-weight ratio | 0.0042 hp/lb | 0.0057 hp/lb |
Heating Area Equivalent | 1,490.5 sq ft | 1,540.3 sq ft |
Cylinder volume/HAE | 1 : 1291.40 | 1 : 1249.62 |
Adhesive weight/Total | 1 : 1.41 | 1 : 1.50 |
Tractive force/Heating area | 1 : 2010.91 | 1 : 2177.05 |
Grate area/Heating area | 1 : 46.90 | 1 : 39.22 |
Firebox/Tube area | 1 : 8.73 | 1 : 10.35 |
No. 503 (first batch)
Locomotive Magazine, September 1923
No. 512 (second batch) rebuilt with smaller wheels and new number 2512
Locomotive Magazine, September 1923
No. 508 with 4-4-0 wheel arrangement and Flaman boiler
Locomotive Magazine, September 1923
Although the Crampton locomotive enjoyed long popularity in France in general and with the Est in particular, it reached its limits in the late 1870s. Thus, Regray initially had seven locomotives made with 2-4-0 wheel arrangement. Since the Belpaire firebox ended with the rear on the second coupled axle and the 2.31 meter diameter wheels were still very large, the locomotives were referred to as “coupled cramptons” or “super cramptons”. On numbers 508 to 510, the firebox was pulled further forward so that it lay between the coupled axles. The locomotives had a double outer frame in which the cylinders were situated.
After the first ten examples had been manufactured in the Est workshops in Épernay in 1878 and 1879, the next 32 examples were ordered from commercial suppliers. The numbers 511 to 522 came from Cail in Paris in 1881 and the 523 to 542 in 1882 from the Wiener Neustädter Lokomotivfabrik. Their wheels were only 2.10 meters tall and the cylinders were slightly smaller. They also featured a conventional firebox that was larger than the previous Belpaire firebox.
A third series of 20 examples was made again in Épernay in 1884 and 1885. These were given a larger boiler, which exceeded the 100 square meter mark for the tubular heating surface. This enabled them to achieve a boiler output that was greater than that of contemporary locomotives with a 2-4-2 or 4-4-0 wheel arrangement. Furthermore, they had received a larger tender that, in addition to the three tons of coal, could hold up to 13 cubic meters of water instead of the ten cubic meters of the older tenders. Traction was later increased on 48 of the 52 examples in the last two series by reducing the wheel diameter to 1.83 metres.
Numbers 508 and 509 were converted to a Flaman boiler in 1888, which could hold a maximum number of smoke tubes with two barrels. Since the front axle was heavily loaded after the conversion, the carrying axle was replaced with a bogie. Since the results of the conversions did not justify the high effort, no other engines were converted in this way. The engines with smaller coupled wheels were soon increasingly used in ordinary passenger train service and were partly used until 1936. The first of the non-converted examples, on the other hand, had already been retired in 1906.
Variant | 501-510 | 511-542 | 543-562 | 2511-2562 - smaller wheels |
---|
General |
Built | 1878-1879 | 1881-1882 | 1884-1885 |
Manufacturer | Épernay | Cail, Wiener Neustadt | Épernay | Cail, Wiener Neustadt, Épernay |
Axle config | 2-4-0 (Porter) |
Gauge | 4 ft 8 1/2 in (Standard gauge) |
Dimensions and Weights |
Length | | 47 ft 0 3/4 in |
Length loco | 27 ft 8 1/16 in | 27 ft 9 7/16 in | 29 ft 5 3/4 in |
Wheelbase | 17 ft 6 5/8 in |
Rigid wheelbase | 17 ft 6 5/8 in |
Empty weight | 31,568 lbs | 31,645 lbs | |
Service weight | 92,241 lbs | 88,229 lbs | 100,817 lbs |
Adhesive weight | 63,206 lbs | 62,038 lbs | 67,814 lbs |
Total weight | 145,152 lbs | 119,094 lbs | 163,980 lbs |
Axle load | 32,871 lbs | 31,129 lbs | 34,921 lbs |
Water capacity | 3,434 us gal |
Fuel capacity | 6,614 lbs (coal) |
Boiler |
Grate area | 18.6 sq ft | 25.6 sq ft | 25.8 sq ft |
Firebox area | 86.1 sq ft | 96.4 sq ft | 98.3 sq ft |
Tube heating area | 910.6 sq ft | 911.1 sq ft | 1,099.1 sq ft |
Evaporative heating area | 996.7 sq ft | 1,007.5 sq ft | 1,197.4 sq ft |
Total heating area | 996.7 sq ft | 1,007.5 sq ft | 1,197.4 sq ft |
Power Plant |
Driver diameter | 90.9 in | 82.7 in | 83.1 in | 72 in |
Boiler pressure | 130 psi | 145 psi | 160 psi |
Expansion type | simple |
Cylinders | two, 17 11/16 x 25 3/16 in | two, 16 15/16 x 24 13/16 in | two, 17 5/16 x 24 in |
Power |
Power source | steam |
Estimated power | 335 hp (250 kW) | 469 hp (350 kW) | 536 hp (400 kW) | 570 hp (425 kW) |
Optimal speed | 22 mph | 31 mph | 32 mph | 27 mph |
Top speed | 56 mph |
Starting effort | 9,647 lbf | 9,537 lbf | 10,693 lbf | 13,569 lbf |
Calculated Values |
Factor of adhesion | 1 : 6.55 | 1 : 6.51 | 1 : 6.34 | 1 : 5.00 |
Power-to-weight ratio | 0.0036 hp/lb | 0.0053 hp/lb | 0.0057 hp/lb |
Heating Area Equivalent | 1,427.3 sq ft | 1,489.7 sq ft | 1,688.7 sq ft |
Cylinder volume/HAE | 1 : 1535.26 | 1 : 1470.92 | 1 : 1297.57 |
Adhesive weight/Total | 1 : 1.46 | 1 : 1.42 | 1 : 1.49 |
Tractive force/Heating area | 1 : 2175.83 | 1 : 2128.04 | 1 : 2007.62 | 1 : 2547.60 |
Grate area/Heating area | 1 : 48.90 | 1 : 35.56 | 1 : 42.55 |
Firebox/Tube area | 1 : 10.58 | 1 : 9.45 | 1 : 11.18 |
At a time when attempts were being made to use the largest possible wheels to achieve high speeds while keeping the center of gravity low, some curious designs emerged. In 1855 Blavier and Larpent built the “L'Aigle” (“The Eagle”) with 9 ft 4 in wheels on the French Ouest. Their goal was to double the speed of the Cramptons. Since these had already reached 120 km/h at that time, this goal was hardly realistic to achieve.
With this wheel diameter, a boiler, which was usually above the axles, would have been very high above the top of the rails. At that time, everyone was convinced that a low center of gravity was the most important criterion for smooth running and developed many long boiler type locomotives, which had a thin and long, overhanging boiler to achieve the lowest possible center of gravity. Since this was not possible with the “L'Aigle”, completely new paths were taken.
Section through the special, two-part boiler
Locomotive Magazine, December 1901
The actual boiler, with a small diameter, lay below the axles and was connected to a second, cylindrical barrel, which lay above the axles. Although the boiler had sufficient volume, there were no smoke tubes in the upper boiler body. This made it impossible to produce enough steam for the large cylinders at higher speeds. Thus, the one-off never made it into commercial service and the allegedly achieved speed of 100 mph must be doubted.
General |
Built | 1855 |
Manufacturer | Bâtignolles-Châtillon |
Axle config | 2-4-0 (Porter) |
Gauge | 4 ft 8 1/2 in (Standard gauge) |
Power Plant |
Driver diameter | 112.2 in |
Cylinders | two, 16 9/16 x 31 1/2 in |
The Galician Carl Ludwig Railway originated from the k.k. Eastern State Railways and operated their lines east of Kraków. These routes are now in Poland and the Ukraine and went via Lemberg and Tarnopol to the border of the Russian Empire. In 1870, ten express locomotives with a 2-4-0 wheel arrangement were ordered from Maschinenfabrik Esslingen, which were classified as IId. In 1878 and 1882 a total of eight more were delivered by the Wiener Neustädter Lokomotivfabrik and designated IIe. As was usual at the time, all three axles were firmly mounted in the frame, but the overall wheelbase of just 3.32 meters still ensured sufficient ability to negotiate curves.
The locomotives from Esslingen were given the names of towns along the CLB routes, the others only numbers. After the railway was nationalized again in 1892, they were given the numbers 2231-2248 by the kkStB. In the same year they received new boilers. Some locomotives on the Kronprinz-Rudolf-Bahn also had numbers starting at 2201, but these became series 122 from 1905 and the CLB locomotives became series 22. All but three locomotives were retired between 1906 and 1915. The fate of the remaining ones was lost in 1917 in the turmoil of war, but probably two pieces came to Poland and one to Russia.
General |
Built | 1870-1871, 1879, 1882 |
Manufacturer | Esslingen, Wiener Neustadt |
Axle config | 2-4-0 (Porter) |
Gauge | 4 ft 8 1/2 in (Standard gauge) |
Dimensions and Weights |
Wheelbase | 11 ft 6 9/16 in |
Rigid wheelbase | 11 ft 6 9/16 in |
Empty weight | 73,634 lbs |
Service weight | 83,996 lbs |
Adhesive weight | 57,100 lbs |
Water capacity | 2,325 us gal |
Fuel capacity | 13,669 lbs (coal) |
Boiler |
Grate area | 17.7 sq ft |
Firebox area | 80.7 sq ft |
Tube heating area | 1,200.2 sq ft |
Evaporative heating area | 1,280.9 sq ft |
Total heating area | 1,280.9 sq ft |
Power Plant |
Driver diameter | 62 in |
Boiler pressure | 145 psi |
Expansion type | simple |
Cylinders | two, 15 9/16 x 24 7/8 in |
Power |
Power source | steam |
Estimated power | 469 hp (350 kW) |
Optimal speed | 25 mph |
Top speed | 34 mph |
Starting effort | 11,968 lbf |
Calculated Values |
Factor of adhesion | 1 : 4.77 |
Power-to-weight ratio | 0.0056 hp/lb |
Heating Area Equivalent | 1,684.6 sq ft |
Cylinder volume/HAE | 1 : 989.73 |
Adhesive weight/Total | 1 : 1.47 |
Tractive force/Heating area | 1 : 2100.48 |
Grate area/Heating area | 1 : 67.99 |
Firebox/Tube area | 1 : 14.87 |