Suomen valtionrautatiet 2-6-4 Locomotives in Finland


Class Details by Steve Llanso of Sweat House Media

Class I1/Vk 1 (Locobase 5639)

Data from Markku Karvonen's personal.inet.fi/koti/markku.karvonen/prk/vanha3.htm (visited 29 March 2003). Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 22, p. 274. Works numbers were 17565-17569 in March 1900.

The animator's railroad website -- [link] (2 April 2003) -- shows a tank engine with all the water tankage behind the cab. The steam dome is over the second driver with the sand dome over the first. A straight, narrow stack with cap juts up out of the smokebox.

Of the five, two were scrapped before World War II, one was lost to the Soviet Union in war, and two carried on until the 1950s.


Class I2/Vk 2- Iitu (tai "Kidekone") (Locobase 5640)

Data from Markku Karvonen's personal.inet.fi/koti/markku.karvonen/prk/vanha3.htm (visited 29 March 2003).

These obviously take their lines from the American quintet of the same wheel arrangement purchased 6 years earlier. Since Locobase doesn't read Finnish, he can't tell much about the history of this little class. But [link] (30 June 2003) published a list of VR classes with dates in service and number. The list shows that at least one of the two in this class ran until 1962.


Class I3/Vk3 - Iitu (tai "Kidekone") (Locobase 5641)

Data from Markku Karvonen's personal.inet.fi/koti/markku.karvonen/prk/vanha3.htm (visited 29 March 2003).

The third of the 3 tanks delivered by Tampella in 1906 had somewhat larger cylinders but a smaller boiler. Hard to figure what the advantage might be, unless these engines ran in short spurts. In any event, VR bought 6 more in 1909, so it was a satisfactory design for some applications.

[link] (30 June 2003) published a list of VR classes with dates in service and number. The last of these engines ran until 1964.

Principal Dimensions by Steve Llanso of Middle Run Media
ClassI1/Vk 1I2/Vk 2- Iitu (tai "Kidekone")I3/Vk3 - Iitu (tai "Kidekone")
Locobase ID5639 5640 5641
RailroadSuomen valtionrautatiet (VR)Suomen valtionrautatiet (VR)Suomen valtionrautatiet (VR)
CountryFinlandFinlandFinland
Whyte2-6-4T2-6-4T2-6-4T
Number in Class527
Road Numbers301-305454-455456, 487-492
Gauge5'5'5'
Number Built527
BuilderBurnham, Williams & CoTampellaTampella
Year190019061906
Valve GearStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)10.25 / 3.12
Engine Wheelbase (ft / m)28.50 / 8.69
Ratio of driving wheelbase to overall engine wheelbase 0.36
Overall Wheelbase (engine & tender) (ft / m)28.50 / 8.69
Axle Loading (Maximum Weight per Axle) (lbs / kg)20,723 / 940023,589 / 10,70023,589 / 10,700
Weight on Drivers (lbs / kg)67,000 / 30,391
Engine Weight (lbs / kg)110,011 / 49,900112,215 / 50,900117,947 / 53,500
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)110,011 / 49,900112,215 / 50,900117,947 / 53,500
Tender Water Capacity (gals / ML)1505 / 5.701505 / 5.701452 / 5.50
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)37 / 18.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)49 / 124549.20 / 125049.20 / 1250
Boiler Pressure (psi / kPa)180 / 1240174 / 1200174 / 1200
High Pressure Cylinders (dia x stroke) (in / mm)15" x 24" / 381x61015.75" x 23.62" / 400x60016.54" x 23.62" / 420x600
Tractive Effort (lbs / kg)16,861 / 7648.0317,613 / 7989.1319,425 / 8811.04
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.97
Heating Ability
Tubes (number - dia) (in / mm)157 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.78 / 3.29
Firebox Area (sq ft / m2)70.10 / 6.51
Grate Area (sq ft / m2)14.53 / 1.3516.57 / 1.5416.57 / 1.54
Evaporative Heating Surface (sq ft / m2)945 / 87.83917 / 85.22884 / 82.16
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)945 / 87.83917 / 85.22884 / 82.16
Evaporative Heating Surface/Cylinder Volume192.51172.17150.50
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation261528832883
Same as above plus superheater percentage261528832883
Same as above but substitute firebox area for grate area12,618
Power L13880
Power MT383.01

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