Bavarian A II
Encyclopedia
The Bavarian A II engines were early German 2-2-2
steam locomotives with the Royal Bavarian State Railways
(Königlich Bayerische Staatsbahn).
The locomotives were conceived as Stephenson Long Boiler engines
. They had an inside forked frame
and the firebox was supported by the trailing axle. The only difference between the engines from the two manufacturers was the location of the feed pump. On the Kessler
variant this was on the outside and driven by crank pins; on the Maffei version they were suspended from the reverse eccentric cam (Rückwärtsexzenter).
After it was discovered that the riding qualities of the loco were very rough, the trailing axle was moved about 127 mm (5 in) further back. In the 1860s the old boiler
on some vehicles was replaced by a Crampton boiler. In addition, six engines were rebuilt with a wheel arrangement
of 0-6-0
and three into 0-4-2
locomotives. The remainder were taken out of service between 1871 and 1877 and scrapped.
They were coupled with 2 T 4.2 tenders
.
2-2-2
Under the Whyte notation for the classification of steam locomotives, 2-2-2 represents the wheel arrangement of two leading wheels on one axle two powered driving wheels on one axle, and two trailing wheels on one axle. The wheel arrangement both provided more stability and enabled a larger firebox...
steam locomotives with the Royal Bavarian State Railways
Royal Bavarian State Railways
As a nation-state, Germany did not come into being until the creation of the German Empire in 1871 from the various German-speaking states such as Prussia, Bavaria, Saxony, Baden and Württemberg. By then each of the major states had formed its own state railway and these continued to remain...
(Königlich Bayerische Staatsbahn).
The locomotives were conceived as Stephenson Long Boiler engines
Long Boiler locomotive
The Long Boiler locomotive was the object of a patent by Robert Stephenson and the name became synonymous with the pattern.-History:It is generally perceived that it arose out of attempts to match the power of broad gauge locomotives within the limitations of the loading gauge of Stephenson railways...
. They had an inside forked frame
Locomotive frame
A locomotive frame is the structure that forms the backbone of the railway locomotive, giving it strength and supporting the superstructure elements such as a cab, boiler or bodywork. The vast majority of locomotives have had a frame structure of some kind...
and the firebox was supported by the trailing axle. The only difference between the engines from the two manufacturers was the location of the feed pump. On the Kessler
Emil Kessler
Emil Julius Carl Kessler was a German businessman and founder of the Maschinenfabrik Esslingen ....
variant this was on the outside and driven by crank pins; on the Maffei version they were suspended from the reverse eccentric cam (Rückwärtsexzenter).
After it was discovered that the riding qualities of the loco were very rough, the trailing axle was moved about 127 mm (5 in) further back. In the 1860s the old boiler
Boiler
A boiler is a closed vessel in which water or other fluid is heated. The heated or vaporized fluid exits the boiler for use in various processes or heating applications.-Materials:...
on some vehicles was replaced by a Crampton boiler. In addition, six engines were rebuilt with a wheel arrangement
Whyte notation
The Whyte notation for classifying steam locomotives by wheel arrangement was devised by Frederick Methvan Whyte and came into use in the early twentieth century encouraged by an editorial in American Engineer and Railroad Journal...
of 0-6-0
0-6-0
Under the Whyte notation for the classification of steam locomotives, 0-6-0 represents the wheel arrangement of no leading wheels, six powered and coupled driving wheels on three axles, and no trailing wheels...
and three into 0-4-2
0-4-2
Under the Whyte notation for the classification of steam locomotives, 0-4-2 represents the wheel arrangement with no leading wheels, four powered and coupled driving wheels on two axles, and two trailing wheels on one axle...
locomotives. The remainder were taken out of service between 1871 and 1877 and scrapped.
They were coupled with 2 T 4.2 tenders
Tender locomotive
A tender or coal-car is a special rail vehicle hauled by a steam locomotive containing the locomotive's fuel and water. Steam locomotives consume large quantities of water compared to the quantity of fuel, so tenders are necessary to keep the locomotive running over long distances. A locomotive...
.
External links
- There is a relevant English-language forum at Railways of Germany