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Finnish Railway classes K1 and K2 “Satikka”

Finnish Railway classes Tk1 and Tk2

Finland 1899 54 produced
No. 413, possibly in Sortavala finna.fi / Helsingin kaupunginmuseo CC BY 4.0

The first 2-8-0 locomotives built for Finland came from the USA. Baldwin delivered 20 in 1899 and 1900 which were called class K1 and got the nickname “Satikka”. They had very small drivers with a diameter of 1,120 mm and their cylinders measured 406 by 508 mm, or 16 by 20 inches. They were designed in a way so that many parts were interchangeable with other steam locomotive classes built by Baldwin for the VR. Between 1903 and 1906, Tampella built 34 in Finland which were designated K2. These had been modified to metric dimensions and had larger cylinders. From 1942, the K1 became the Tk1 and the K2 became the Tk2. The Tk1 was withdrawn in 1959 and the Tk2 followed in 1960. Tk2 No. 418 can today be found on static display in Junction City, Oregon.

No. 418 at Junction City, Oregon Will Jenkins

Technical data

General

Property K1 / Tk1 K2 / Tk2
Built 1899-1900 1903-1906
Manufacturers Baldwin Tampella
Wheel arrangement 2-8-0 (Consolidation)
Gauge 1,520 mm (Russian broad gauge)

Dimensions and weights

Property K1 / Tk1 K2 / Tk2
Wheelbase 5.79 m
Service mass 37.5 t 37.4 t
Adhesion mass 32.7 t
Rigid wheelbase 3.81 m
Axle load 8.3 t
Water capacity 7,600 l 7,500 l

Boiler

Property K1 / Tk1 K2 / Tk2
Grate area 1.37 m² 1.4 m²
Firebox surface 6.56 m²
Tube heating surface 73.97 m²
Evaporative heating surface 80.53 m² 83.64 m²
Total heating surface 80.5 m² 83.6 m²

Power plant

Property K1 / Tk1 K2 / Tk2
Driver diameter 1,120 mm
Boiler pressure 12.4 bar 12.5 bar
Cylinders two, 406 x 508 mm two, 410 x 590 mm

Power

Property K1 / Tk1 K2 / Tk2
Estimated power 250 kW (340 PS) 260 kW (354 PS)

Calculated values

Property K1 / Tk1 K2 / Tk2
Optimal speed 19 km/h 18 km/h
Power-to-weight ratio 6.7 kW/t 7.0 kW/t
Heating Surface Equivalent 113.3 m²
Cylinder volume/HSE 1 : 1,160.62
Adhesive weight/Total 1 : 1.15
Grate area/Heating surface 1 : 58.78 1 : 59.74
Firebox/Tube surface 1 : 11.28
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