MG H 2/3
| H 2/3 | |
|---|---|
 Locomotive No. 2
|
|
| Numbering: | 1 - 6 |
| Number: | 6th |
| Manufacturer: | SLM |
| Year of construction (s): | 1890 |
| Retirement: | 1941, 1954 |
| Axis formula : | 3zz |
| Gauge : | 800 mm |
| Length over buffers: | 5490 mm |
| Fixed wheelbase: | 1230 mm |
| Total wheelbase: | 2830 mm |
| Empty mass: | 11.3-11.9 t |
| Service mass: | 13.8-14.4 t |
| Friction mass: | 0 t |
| Top speed: | 9 km / h |
| Driving wheel diameter: | 573 mm |
| Gear system : | Dept |
| Number of drive gears: | 2 |
| Size gears: | 12 teeth |
| Number of cylinders: | 2 |
| Cylinder diameter: | 300 mm |
| Piston stroke: | 550 mm |
| Cylinder d. Gear drive: | 300 mm |
| Piston stroke gear drive: | 550 mm |
| Boiler overpressure: | 12 atm. |
| Number of heating pipes: | 158 |
| Heating pipe length: | 1650 mm |
| Grate area: | 0.6 m² |
| Evaporation heating surface: | 32.2 m² |
| Water supply: | 1 m³ |
| Fuel supply: | 0.7 t coal |
| Gradient: | 220 ‰ |
The six cogwheel steam locomotives that were bought by the Monte Generoso-Bahn (MG) in 1890 were pure cogwheel locomotives with the designation H 2/3 . The purchase price is stated as 34,500 Swiss francs. Before 1902, the machines were H I referred.
history
These are the first pure cogwheel locomotives based on the Abt system that the Swiss Locomotive and Machine Factory in Winterthur produced. The changeover of the railway to diesel operation in 1954 saw four locomotives. Numbers 1 and 3 were scrapped and scrapped in 1941. Thereafter, the locomotives number 5 and 6 were converted into the diesel locomotives of the type Hm 2/3 , and number 2 was installed as a monument locomotive in Capolago. Number 2 was made roadworthy again from 1981 and is still operational today.
The MG took over a total of four locomotives of the similar type H 2/3 from the Chemin de fer Glion-Rochers-de-Naye .
- 1941 No. 4, classified as number 7, sold in 1962 to BRB (there No. 1 II )
- 1942 No. 6, classified as number 8
- 1949 No. 8, classified as number 9
- 1956 No. 1, as number 1 II (second assignment)
technology
The locomotives were the first six to be built by SLM based on this design. A total of 40 locomotives of a similar design were produced.
The locomotive has an outer frame and a sloping boiler (12% inclined forward). Typical of this type of locomotive is the high cylinder bearings according to the Brown system and the transmission with a vertical double transmission lever. Because the lever arms were unequal, a power transmission could be achieved without a gearbox or jackshaft. The gear ratio is 1: 1.34. The coupling rod drove the two gear axles on which the loosely rotating impellers were located. Hall cranks, on which the counterweights are also located, sit on the drive axles. On each drive axle there is a drive wheel on which there is a double gear, the teeth of which are shifted by half a pitch. This gear has a pitch circle dimension of 573 mm, which results in a gear with 12 teeth. There are eight damping springs between the ring gear and the wheel center of each drive gear. These have the task of absorbing the tooth pressure caused by pitch errors. They also cushioned the impacts that occur when moving off. Under the fire box there was a third axle, the so-called support axle, which was guided by a Bissel drawbar frame. The right wheel of the support axle was also rotatably arranged on the axle. This made cornering easier as there was no rigid axle connection between the two wheels. The running wheels on the drive axles not only had the function of guiding in the track, they also determined the depth of tooth engagement in the rack. The two drive axles were supported by the leaf springs on the bearing, which were located on the outside of the frame. The support axis was supported by a transverse leaf spring. As a safety device, a Ramsbottom safety valve was mounted on the steam dome of the boiler, which was later exchanged for a pop safety valve.
The counter-pressure brake served as the service brake . The two hand brakes acted with armored brake bands on each one grooved brake disc on both drive axles. This grooved brake disc was located directly on the axle on both sides of the gear. An automatic vapor barrier also acted on these four brake disks , which responded automatically if the speed was exceeded . This vapor barrier could also be operated manually and was usually also used to stop.
The locomotives number 1 and 3 had steam heating .
literature
- Alfred Moser: The steam operation of the Swiss railways 1847-1966 . 4th updated edition, Birkhäuser, Stuttgart 1967, (6th edition ISBN 3-7643-0742-0 ) pages 364–369
- Peter Will; Locomotives and railcars of the Swiss Railways, Volume 4 Private Railways Central, Southern and Eastern Switzerland 1983 Orell Füssli ISBN 3-280-01301-1 page 69