7170 steam locomotive
Encyclopedia
The Japanese Class 7170 steam locomotive was among the first trains to be used in Hokkaidō
, and was utilized alongside the JNR Class 7100 on the Horonai Railway
.
The two tender locomotive
s that were to become the Class 7170 were purchased from the American Baldwin Locomotive Works
in 1889, and were included into the numbering sequence of the six 7100 trains as numbers 7 and 8. Soon afterwards, the Horonai Railway came to be controlled by Hokuyūsha company president Murata Tsutsumi, who renamed them "First Murata" and "Second Murata" (dai-ichi and dai-ni Murata). The two were later sold off by the Meiji
government, which privatized (sold) a great many government endeavors.
, the two locomotives were re-numbered 9 & 10 upon their sale by the government-controlled Horonai Railway to the Hokkaidō Colliery and Railway Company
in 1889. The 1906 Railway Nationalization Act
then incorporated the Hokkaidō Collery and Railway Company into the Japanese Government Railways
. Three years later, legislation would formalize and standardize the numbering, establishing the Class 7170 as consisting of these two locomotives, dubbed 7170 and 7171. At this time, the chimneys were altered, and the forward sections of the steam rooms expanded.
Following the nationalization of the railways, in 1920 the two were sold to the Suttsu Railways, and re-numbered No. 1 and No. 2, serving Kutchan
, Muroran
, Asahikawa
and Hakodate
. Though they served their new purpose well, and were used extensively, one of the locomotives suffered an accidental collision on July 2, 1950, and was scrapped the following year.
s, which were 1,372 mm apart; the first and second driving wheels were 2,296 mm apart. Of the tender's three axles, the second and third were bogie
s.
Hokkaido
, formerly known as Ezo, Yezo, Yeso, or Yesso, is Japan's second largest island; it is also the largest and northernmost of Japan's 47 prefectural-level subdivisions. The Tsugaru Strait separates Hokkaido from Honshu, although the two islands are connected by the underwater railway Seikan Tunnel...
, and was utilized alongside the JNR Class 7100 on the Horonai Railway
Horonai Railway
The Horonai Railway was a Japanese government-managed railway which was among the first to be built in Hokkaidō. Established in 1869, it was sold off to the private sector twenty years later...
.
The two tender locomotive
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...
s that were to become the Class 7170 were purchased from the American Baldwin Locomotive Works
Baldwin Locomotive Works
The Baldwin Locomotive Works was an American builder of railroad locomotives. It was located in Philadelphia, Pennsylvania, originally, and later in nearby Eddystone, Pennsylvania. Although the company was very successful as a producer of steam locomotives, its transition to the production of...
in 1889, and were included into the numbering sequence of the six 7100 trains as numbers 7 and 8. Soon afterwards, the Horonai Railway came to be controlled by Hokuyūsha company president Murata Tsutsumi, who renamed them "First Murata" and "Second Murata" (dai-ichi and dai-ni Murata). The two were later sold off by the Meiji
Meiji period
The , also known as the Meiji era, is a Japanese era which extended from September 1868 through July 1912. This period represents the first half of the Empire of Japan.- Meiji Restoration and the emperor :...
government, which privatized (sold) a great many government endeavors.
History
Though originally numbered 8 & 9 upon their import from the United StatesUnited States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...
, the two locomotives were re-numbered 9 & 10 upon their sale by the government-controlled Horonai Railway to the Hokkaidō Colliery and Railway Company
Hokkaido Colliery and Railway Company
was a company engaged in coal mining, railway operation and shipping in Hokkaidō, Japan.The company was established in 1889 when the state-owned and Horonai Railway were sold to the company...
in 1889. The 1906 Railway Nationalization Act
Railway Nationalization Act
The brought many of Japan's private railway lines under national control. The Diet of Japan promulgated the Act on March 31, 1906. The Act was repealed by Article 110 of the Japan National Railway Reform Act of 1988, which formed the modern Japan Railways Group....
then incorporated the Hokkaidō Collery and Railway Company into the Japanese Government Railways
Japanese Government Railways
The Japanese Government Railways was the national railway system directly operated by the central government of Japan until 1949. It is a predecessor of Japanese National Railways and the Japan Railways Group.- Name :...
. Three years later, legislation would formalize and standardize the numbering, establishing the Class 7170 as consisting of these two locomotives, dubbed 7170 and 7171. At this time, the chimneys were altered, and the forward sections of the steam rooms expanded.
Following the nationalization of the railways, in 1920 the two were sold to the Suttsu Railways, and re-numbered No. 1 and No. 2, serving Kutchan
Kutchan, Hokkaidō
-Neighboring municipalities:*Shiribeshi**Abuta District: Kyōgoku, Niseko**Isoya District: Rankoshi**Iwanai District: Kyōwa**Yoichi District: Niki, Akaigawa**Kimobetsu and Makkari of the Abuta District lie on the southern side of Mount Yōtei.-History:...
, Muroran
Muroran, Hokkaido
is a city and port located in Iburi, Hokkaidō, Japan. It is the capital city of Iburi Subprefecture.As of 2008, the city has an estimated population of 96,724 and a density of 1,210 people per km². The total area is 80.65 km².- History :...
, Asahikawa
Asahikawa, Hokkaido
is a city in Kamikawa Subprefecture, Hokkaido, Japan. It is the capital of the subprefecture and the second-largest city in Hokkaido, after Sapporo. It has been a Core city since April 1, 2000...
and Hakodate
Hakodate, Hokkaido
is a city and port located in Oshima Subprefecture, Hokkaido, Japan. It is the capital city of Oshima Subprefecture.Hakodate was Japan's first city whose port was opened to foreign trade in 1854 as a result of Convention of Kanagawa, and used to be the most important port in northern Japan...
. Though they served their new purpose well, and were used extensively, one of the locomotives suffered an accidental collision on July 2, 1950, and was scrapped the following year.
Construction
The tender locomotives had their maker's standard 2-6-0(1C) axle positions. Like the 7100 series, they bore a diamond-shaped chimney and cow catcher in the older American style, but had straight-top boilers instead of wagon-top ones, and a steam-dome in the second boiler compartment. The furnace was located between the second and third driving wheelDriving wheel
On a steam locomotive, a driving wheel is a powered wheel which is driven by the locomotive's pistons...
s, which were 1,372 mm apart; the first and second driving wheels were 2,296 mm apart. Of the tender's three axles, the second and third were bogie
Bogie
A bogie is a wheeled wagon or trolley. In mechanics terms, a bogie is a chassis or framework carrying wheels, attached to a vehicle. It can be fixed in place, as on a cargo truck, mounted on a swivel, as on a railway carriage/car or locomotive, or sprung as in the suspension of a caterpillar...
s.
Main specifications
- Total length：13,005 mm
- Total height：3,696 mm
- Axle positions：2-6-0(1C)
- Driving wheel diameter：1016 mm (3 ft 4 in)
- Gauge: standard Stephenson gauge, American type
- Cylinders：356 mm×457 mm
- Boiler pressure：7.7 kgf/cm² (760 kPa)
- Fire lattice area：1.06 m²
- Total heat area：69.8 m²
- Steam：55.7 m²
- Furnace：14.1 m²
- Boiler capacity：2.3 m³
- Smaller pipes：454.5 mm×2489 mm (160 count)
- Locomotive operating weight：24.33 t
- Locomotive weight empty：22.05 t
- Driving wheel weight (running)：20.12 t
- Driving wheel axle weight (largest)：7.77 t
- Tender operating weight：15.44 t
- Tender weight empty：8.43 t
- Water tank capacity：4.22 m³
- Fuel capacity：1.88 t