Steam Engine OKl27
About Steam Engine OKl27 including pictures a model of such an engine that is located in the Warsaw Train Museum.
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The OKl27 steam engine maintains a special place in the railroad history of Poland as the OKl27 steam engine was the first locomotive completely designed and manufactured in Poland.
It was reliable, well-liked, and enjoyed many years of reliable operations on railroads around Europe. The successor to the postwar locomotive steam engine was TKt48.
Commemorative Railroad Cup
You may buy a Railroad Collector’s Cup for the OKl27 at this link. Railroad Mugs
You may also buy it and other unique gifts at the SpecialGiftsStore
Pictures Of The Cup
The engine OKl27 was manufactured on the order of the Polish Ministry of communications based on a design presented by Cegielski factory in Poznan, and approved by PKP ( the Polish Railroad) in 1927.
The rationale for its construction was a shortage of passenger locomotives that could service suburban lines.
By 1928 the factory delivered four locomotives and subsequently produced an additional 118. They ceased production in 1933.
This type locomotive was designed for passenger services on suburban lines. It, being a tank locomotive, could run at full speed in both directions and was capable of fast startup and frequent stops.
Generally, due to instability, the locomotive generally did not run above 50 km/h.
It was a well-designed locomotives and used by the Polish railways for about 50 years. The last OKl27 (OKl27 – 10) was used for switching at the Skierniewice locomotive depot until 1979. It is still there, though not in operable condition.
During the Second World War engines were taken by both the Germans and Russians. They were scattered around Europe with engines being found in Austria Czechoslovakia and France.
There are four surviving specimens:
OKl27-26 – Location – Warsaw Railroad Museum
OKl27-10 – Location – Skierniewice Locomotive Depot
OKl27-27 – Location – Gdynia Grabowek Locomotive Depot
OKl27-41 – Location – Chabowka Rolling Stock Heritage Park “Skansen”
O designates a passenger locomotive
K designates a tank locomotive
l designates the axle arrangement 1-3-1
27 designates the year of the design.
For complete information about designations see PKP Standard Gauge Steam Engine Designations
OKl27 Technical Data
The data in the table below is credited to Locomotives.com.pl . Visit that site for much more information about the OKl27
|Years of manufacture|
1928 – 1933
|Total built / used in Poland|
122 / 122
|Design maximum speed|
2 X 540
685 / 930
m X m
2.42 X 1.01
|Firebox heating surface|
|Distance between tube plates|
|Number of flue tubes|
|Heating surface of flue tubes|
|Number of smoke tubes|
|Heating surface of smoke tubes|
|Evaporating surface, total|
|Superheater heating surface|
|Diameter of drivers|
|Diameter of idlers front/rear|
860 / 860
|Total weight, empty|
|Total weight, working order|
|Adhesive weight, working order|
|Weight with tender, empty|
|Weight with tender, working order|
|Maximum axle load|
|Axle base (with tender)|
|Overall length (with tender)|
- 1) Adjusted from 16.0 to 17.5 tonnes (from OKl27-21 onwards, 18.2 tonnes) by changing suspension levers mounting.
- 2) Up to OKl27-20 inclusive: overall length 12 613 mm, weight empty 61 500 kg, in working order 80 800 kg, weight on drivers 51 800 kg.