Jydsk-Fyenske Jernbaner 2-4-0 Locomotives in Denmark


Class Details by Steve Llanso of Sweat House Media

Class B (Locobase 3987)

Data from WilliamBay, Danmarks Damplokomotiver (1977). Class information from [link].

Jernbanen.dk notes that this set of 11 of locomotives was part of a larger order. As Stephenson began work on the order, the JFJ sent 2 mechanical apprentices in Spring 1868 to get a better idea of how such locomotives were assembled. A photo of B 26 shows the porthole windows in the weatherboard and the rounded cab roof that together with the slender boiler, heavy castings on the smokebox, and the tall dome and stack suggests a candidate for the Thomas series.

All of the boilers were replaced in 1888-1893. B 21, B 22 were retired in 1910 and 1907, respectively. Most of the others were retired in the 1920s; B 47 went in September 1931; B 46 was withdrawn in September 1932. B 45 was retired in April 1928 and donated to the Railway Museum.


Class C (Locobase 3995)

Data from William Bay, Danmarks Damplokomotiver (1977). Class information from [link].

These were tender-trailing versions of the F-class tanks that were delivered by Hawthorn in the same year (Locobase 3994). Probably because they were not tank engines, this quartet was retired four decades sooner than the Fs. C 66-C 67 were withdrawn in 1896 and C 65, C 68 went in 1897.


Class Kj (Locobase 3996)

Data from William Bay, Danmarks Damplokomotiver (1977). Class information from [link].

Opening southern Jutland's Lunderskov-Esbjerg-Varde line described in Locobase 3994 prompted the purchase of F-class 0-6-0T tank engines, C-class 2-4-0 tender engines, and these 2-4-0 tanks. They were small and light and obviously very handy to have around.

The first of the class -- Kj 74 -- was scrapped only in 1924 (50 years after delivery) while the others all remained in service for another few years. The last to be scrapped was the class leader Kj 69 in 1934.

Principal Dimensions by Steve Llanso of Middle Run Media
ClassBCKj
Locobase ID3987 3995 3996
RailroadJydsk-Fyenske Jernbaner (JFJ)Jydsk-Fyenske Jernbaner (JFJ)Jydsk-Fyenske Jernbaner (JFJ)
CountryDenmarkDenmarkDenmark
Whyte2-4-02-4-02-4-0T
Number in Class1148
Road NumbersB 21-B 26, B 45-49C 65-C 68K 69-K 76 / Kj 69-Kj 76
GaugeStdStdStd
Number Built1148
BuilderRobert Stephenson & CoR & W HawthornR & W Hawthorn
Year186818741874
Valve GearStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 6.50 / 1.98
Engine Wheelbase (ft / m)12.75 / 3.88
Ratio of driving wheelbase to overall engine wheelbase 0.51
Overall Wheelbase (engine & tender) (ft / m)28.32 / 8.63
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)34,721 / 15,74934,048 / 15,44424,641 / 11,177
Engine Weight (lbs / kg)57,119 / 25,90957,344 / 26,01136,736 / 16,663
Tender Loaded Weight (lbs / kg)34,721 / 15,74934,048 / 15,44424,641 / 11,177
Total Engine and Tender Weight (lbs / kg)91,840 / 41,65891,392 / 41,45561,377 / 27,840
Tender Water Capacity (gals / ML)1241 / 4.701426 / 5.40502 / 1.90
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 3.40 / 3 2.20 / 2 2.20 / 2
Minimum weight of rail (calculated) (lb/yd / kg/m)29 / 14.5028 / 1421 / 10.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)60 / 152460 / 152448 / 1219
Boiler Pressure (psi / kPa)123.30 / 850123.30 / 850123.30 / 850
High Pressure Cylinders (dia x stroke) (in / mm)15" x 22.05" / 381x56015" x 22.01" / 381x55910.98" x 20" / 279x508
Tractive Effort (lbs / kg)8666 / 3930.848650 / 3923.585265 / 2388.17
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.01 3.94 4.68
Heating Ability
Tubes (number - dia) (in / mm)154 - 1.89" / 48
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.30 / 3.14
Firebox Area (sq ft / m2)71.45 / 6.64
Grate Area (sq ft / m2)13.99 / 1.3010.76 / 1 7.53 / 0.70
Evaporative Heating Surface (sq ft / m2)732 / 68.03780 / 72.49433 / 40.24
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)732 / 68.03780 / 72.49433 / 40.24
Evaporative Heating Surface/Cylinder Volume162.31173.27197.55
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation17251327928
Same as above plus superheater percentage17251327928
Same as above but substitute firebox area for grate area8810
Power L13115
Power MT403.39

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