Saxon XV HTV
As a genus XV T the Royal Saxon State Railways freight tank locomotive, which had been conceived as a leader and pushing locomotives for routes designated in the Ore Mountains. The German Reichsbahn ordered the steam locomotives from 1925 onwards in the series 79.0.
History
The two locomotives were built in 1916 at the Saxon Maschinenfabrik formerly Hartmann in Chemnitz with the factory numbers 1351 and 1352.
The undercarriage of the locomotives was exceptional. Instead of also proposed locomotive with six times the clutch and side shift Gölsdorf -axis, as it was realized a year later at the Württemberg K, the KSSt.Eb. decided on the proposal of the competent Board of mechanical engineering Office of the State Railway Upper Lindner building advice for a single in Germany Construction: The XV HTV received two fixed under mounted six-coupled engines. This happened mainly because he doubted the suitability of the design Gölsdorfschen at six coupled axles. The respective outer axles of the vehicles were designed as Klien - Lindner- hollow axle and were each 37 mm laterally deflected from its central position. The construction of these axes required storage in an outer frame. In the middle of the engine is a double cylinder were each a high pressure cylinder for the rear, and a low-pressure cylinder for the front suspension.
This design should convince by a low stress of the track, low internal resistance and simple mass balance and avoid the use of cranked driving axles. Similar considerations led to the development of duplex locomotives in the 1930s in the United States. Since the adjacent cylinders axes exhibited from side to side 28 mm, the locomotive could pass through radii up to 170 m. The special design of the cylinder, the installation of goiter axes had been avoided. Although the steam paths between the high pressure and the design of products was extremely reduced to the low pressure cylinder, but on the other hand have an inflow and outflow longer necessary.
Soon showed that due to the engines and the hollow axles to high maintenance costs of the XV HTV, so more procurements remained. The usual for all composite locomotives tendency to spin could not be eliminated by the Lindnersche construction. Due to the wear of the tires, the crank position of the engines changed. Thus a constant readjustment of Triebwerkssynchronizität was necessary to ensure a uniform power distribution.
However, while the use of the locomotives were able to convince. So they possessed up to top speed a distinctive smoothness and hardly inclined to wheel flange wear. The German Reichsbahn took over both copies than 79 001 to 79 002, but looked at it in 1932.
The series number 79 001 was followed from 1938 to 1947 the locomotive BLE # 44 of the former Brunswick State Railway and from 1951, the former French and arrived after the war in German hands 242 TA - 602 allocated.
Design features
Long vessel consisted of two shots having a diameter of 1.450 mm. On the boiler there were two steam domes, which were connected by a tube inside the boiler. Between the steam dome and chimney sat the sandbox. The firebox was made of copper and was on the first axis of the rear engine. The smoke tube superheaters was of Schmidt-type.
The continuous frame consisted of 28 mm thick plate as inner frame and 20 mm thick plate for the outer frame of the hollow axles.
The four-cylinder compound engine was mounted externally horizontally and drove to the respective central wheel set.