As mentioned above, at the same time as the Class III purchases, MÁV also ordered Class II engines. They were very similar to the Class III ones, with the same boiler and all other fittings, just they had 2-4-0 (1B) arrangement instead of 0-6-0. They had the same of very similar outside frames, thus the leading axle was fixed in the frame, not moving sideways. The drivers were larger diameter, while the leading wheels were smaller than those of the Class III. This resulted higher top speeds but less traction force. These engines were used for passenger trains on the plain.
The first loco of this type, built for MÉV in 1865 had a slightly
different frame. The MÁV Class II loco, (later Class 238) was however
very similar to the Class III (later Class 335) engines, just had a driver
diameter of 1510mm, 59.5". At the time of the Class IIIe (326) engines the
Class II became obsolete, the passenger trains were hauled by Class I engines,
thus MÁV did not order Class II locos similar to the Class IIIe. One
private company however, EMGV still ordered new engines in 1886, they became
later the MÁV Class IIp, Class 241 after 1911. This was a rather small
Class, with 3 members only.
The members of the Class III were freight engines on flat areas, and passenger engines in the mountains. MÁV needed freight engines for the mountains too. They were the Class IV 0-8-0 engines. Their construction was quite similar to those of the Class III locos, but they had smaller diameter drivers and larger boilers.
Three Classes of these engines were built. The first one, the Class IV (later 441) was a parallel development with the Class III in 1870. Interestingly, at these engines only the first and last drivers were suspended by springs. The second and third drivers were equalized only.
The second lot, Class IVa (later Class 420) was developed parallel to the Class IIIe in 1884. It was however considerably heavier.
The third type of the Class, the IVc (later Class 421) was developed in 1895,
for the line Karlovac-Rijeka, through the Karst mountain to the Adriatic
sea. This development was the last one with external frame, and was rather
a failure. The tight track radii of this line, down to 275m (900') were very
quickly worn out by these heavy, rigid frame engine. Thus MÁVAG redesigned
it as inside frame Mallet engine. It became the first type of the very successful
Hungarian Mallet engines.
On the base of the Class III engines even smaller engines were developed
for the light branchlines. They had a similar structure, but smaller boiler.
They were put into Classes V and VI. As the cab should remain the same size,
but the boiler considerably smaller than the "usual" engines, they look weird
a bit.
In the 1890s, although the production of the Class IIIe engines continued,
MÁV needed stronger, more modern locomotives for the same purpose.
The 326's successor, the Class IIIq, later Class 325
engine was constructed with internal frame, a stronger boiler and as compound
engine. It was apr. 50% more powerful as well.
As among my future plans I intend to build a model of this engine, there is a separate page dedicated to this loco.
| MÁV | Magyar Államvasutak | (Hungarian State Railway) | |
|---|---|---|---|
| BPV | Budapest-Pécs Vasút | (Budapest-Pécs Railway) | |
| EEV | Elsö Erdélyi Vasút Társaság | (First Transylvanian Railway Company) | |
| EMGV | Elsö Magyar Gácsországi Vasút Társaság | (First Hungarian Galician Railway Company) | |
| MÉV | Magyar Északi Vasút Társaság | (Hungarian Northern Railway Company) | |
| GySEV/RÖEE | Györ-Sopron-Ebenfurth Vasút/ Raab-Ödenburg-Ebenfuth Eisenbahn |
(Györ-Sopron-Ebenfurth Railway) |
| MÁVAG | Budapest | Magyar Államvasutak Gépgyára | (Machine Plant of the Hungarian State Railway) |
|---|---|---|---|
| Mf.StEG | Vienna | Maschinen-Fabrik der k.k. priv. Österreichischen Staatseisenbahn Gesellschaft |
(Machine Manufacture of the King's and Kaiser's Private Austrian State Railway Company) |
| Krauss | Linz | Lokomotivfabrik Krauss & Co. | (Locomotive Manufacturer Krauss & Co. - Linz) |
| Sigl | Wiener Neustadt | G. Sigl Lokomotiv Fabrik | (G. Sigl Locomotive Workshop) |
| Wöhlert | Berlin | F. Wöhlert'sche Machinenbau-Anstalt und Eisengiesserei AG. |
(F. Wöhlert's Machine Building Establishment and Iron Foundry Co.) |
| WLF | Floridsdorf | Wiener Lokomotivfabriks AG. | (Vienna Locomotive Manufacturer Co.) |
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This page was updated last time on 4th August 1998
© János Erö
