JNR No. 6600 to 6623
| JNR No. 6600 to 6623 (until 1909 Nippon Tetsudō Bbt 2/5) |
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 Nippon Tetsudō No. 506 (later JNR No. 6600). Factory shot of Baldwin
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| Numbering: | Nippon Tetsudō: 506-529 JNR: 6600-6623 |
| Number: | 24 |
| Manufacturer: | Baldwin |
| Year of construction (s): | 1897 |
| Type : | 2'B1 'n2 |
| Gauge : | 1067 mm ( cape track ) |
| Length over coupling: | 16,294 mm |
| Service mass with tender: | 73.4 t |
| Friction mass: | 21.61 t |
| Wheel set mass : | 13.82 t |
| Coupling wheel diameter: | 1,422 mm |
| Impeller diameter front: | 711 mm |
| Rear wheel diameter: | 838 mm |
| Control type : | Stephenson |
| Cylinder diameter: | 406 mm |
| Piston stroke: | 559 mm |
| Boiler overpressure: | 124.6 N / cm² |
| Grate area: | 2.79 m² |
| Radiant heating surface: | 8.7 m² |
| Tubular heating surface: | 144.6 m² |
The vehicles with the numbers 6600 to 6623 of the Japanese National Railways (JNR) were steam locomotives with the wheel arrangement 2'B1 '( Atlantic ). They were the first and only locomotives with this wheel arrangement in Japan.
The 24 machines delivered by Baldwin in 1897 were among the very first Atlantics. They were scaled-down versions of the typical North American Atlantic and accordingly had bar frames, internal Stephenson controls , three-point support, a spacious driver's cab and a four-axle tender with bogies. In contrast to the standard-gauge Atlantics of that time, the fire box was already completely behind the coupling axles and could therefore be made comparatively wide.
Upon delivery, the locomotives were numbered 506 to 529 of the Nippon Tetsudō , and after the nationalization of the Japanese railways , they were redrawn as 6600 to 6623.
The Atlantic design was unable to establish itself on the Cape Gauge routes in Japan because of its low tractive effort, and no further Atlantics were procured. The locomotives were not taken out of service until 1925, no earlier than most of the German Atlantics.
CGR class 4
| CGR class 4 (different data) |
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 CGR No. 300 (later SAR class O4 No. 0300). Factory shot of Baldwin
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| Numbering: | 295-300 |
| Number: | 6th |
| Service mass with tender: | 76.1 t |
| Radiant heating surface: | 9.1 m² |
| Tubular heating surface: | 144.9 m² |
In 1896, Cape Government Railways (CGR), a predecessor company of South African Railways , also needed new express locomotives. At that time, however, the British locomotive factories, from which this railway had traditionally procured its locomotives, were blocked by strikes, and besides, the steamships had suddenly doubled their freight rates. Baldwin was able to make a favorable offer because of the previous delivery of the Atlantics to Japan, and so in May 1897, just two months after the order, six locomotives were delivered - on sailing ships.
The locomotives, including the tenders, differed from the Japanese only in details. In addition to a slightly larger heating surface, the main difference was the equipment with funnel couplings , while in Japan at that time buffers and hook couplings based on the European model were still common.
The locomotives were given the numbers 295 to 300 and were assigned to class 4 (together with older 2'C locomotives, see CGR class 4 (Stephenson) ). When the SAR was founded in 1910, they were already considered obsolete and assigned to class O4 (O for obsolete). Nevertheless, at least some of the machines were still in operation until 1931.
Like their counterparts in Japan, they remained the only Atlantics in the country. Significant for the South African railways, however, was the associated introduction of the bar frame, with which the locomotives had a similar significance for the country as the Bavarian S 2/5, which were also supplied by Baldwin, were for the Bavarian railways.
According to John Young, these locomotives were for standard gauge (gauge 1435mmm), while the Japanese sisters ran on Cape Gauge.
Individual evidence
- ↑ Archive link ( Memento of the original from May 9, 2008 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice.
literature
- Wilhelm Reuter: The most beautiful of the rails - The history of the Atlantic. Transpress Verlag, ISBN 3-613-01512-9