User:Venudxb/sandbox/Indian IRS Locomotives

IRS Locomotives are standard locomotives, that British locomotive factories built for British India in the 1930s. The name is derived from Indian Railway Standard (IRS).

History

Mit dem Ausbau des Eisenbahnnetzes in Britisch-Indien stieg ab den 1880er-Jahren der Bedarf an Lokomotiven. Die traditionellen britischen Hersteller konnten die Nachfrage auf dem indischen Subkontinent nicht mehr decken, sodass nach einer rationelleren Fertigung gesucht wurde. Die British Engineering Standards Association (BESA) stellte 1903 erstmals Standard-Baureihen vor, die bis 1924 zur Baureihenfamilie der BESA-Lokomotiven ergänzt wurde, die sieben Breitspur- und vier Meterspur-Baureihen umfasste. Im Jahre 1924 wurde ein neuer Normenausschuss bestimmt, der die Aufgabe hatte, die BESA-Entwürfe zu überarbeiten und neue leistungsfähigere Lokomotiven zu entwickeln.

IRS Series

The series names consisted of a prefix for the Track width and another letter together. Unlike the BESA locomotives, the letter no longer had any self-sentient meaning. The following prefixes were used for the gauge designation:

• X for Indian broad gauge
• Y for meter gauge
• Z for 76 cm gauge
• Q for 60 cm gauge

Broad Gauge locomotives

Series	Description	Wheel arrangement	Wheel coupling diameter	Wheelset drivemass	Total mass	Number Built	Picture
XA	Passenger locomotive for branch lines	2’C1’ h2	61.5 in (1560 mm)	13.3 t	111 t	113
XB	Light passenger locomotive	2’C1’ h2	74 in (1880 mm)	17.3	142 t	99
XC	Heavy passenger locomotive	2’C1’ h2	74 in (1880 mm)	19.8 t	178 t	72
XD	Light goods locomotive	2’D1’ h2		17.3 t		194
XE	Heavy goods locomotive	2’D1’ h2	61.5 in (1560 mm)	22.9 t	202 t	93
XF	Light shunting locomotive	D h2		18.3 t		6
XG	Heavy shunting locomotive	D h2		23.4 t		3
XH 1)	4-cylinder goods locomotive	1’D1’ h4		28.4 t
XP	Experimental passenger locomotive	2’C1’ h2		18.8 t
XT	Light tank locomotive	B1’ h2t		15.2 t		77
XS	experimental 4-cylinder passenger locomotive	2’C1’ h4	74 in (1880 mm)	21.8 t	175 t

¹⁾ series not built

Meter Gauge locomotive

Series	Description	Wheel arrangement	Wheel coupling diameter	Wheelset drivemass	Total mass	Picture
YA 1)		2’C1’ n2		9.1 t
YB		2’C1’ n2		10.2 t
YC		2’C1’ n2		12.2 t
YD		1’D1’ n2		10.2 t
YE 1)		1’D1’ n2		12.2 t
YF		C1’ n2 1’C1’ n2		8.1 t
YK		1’C n2		8.1 t
YL
YP
YT		C1’ n2t		8.1 t
YG

¹⁾ series not built

76 cm gauge narrow gauge locomotive

Series	Description	Wheel arrangement	Wheel coupling diameter	Wheelset drivemass	Total mass	Picture
ZA 1)		1’C1’ n2		4.6 t
ZB		1’C1’ n2		6.1 t
ZC 1)		1’D1’ n2		6.1 t
ZD 1)		2’C1’ n2		8.1 t
ZE		1’D1’ n2		8.1 t
ZF		1’C1’ n2t		8.1 t

¹⁾ series not built

60 cm gauge locomotive

Series	Wheel arrangement	Total mass
QA 1)	1’C1’ n2	4.6 t
QB 1)	1’C1’ n2	6.1 t
QC 1)	1’D1’ n2	6.1 t

¹⁾ series not built

Literature

• Leslie S. Robertson (1905-11), British Standards Institution (ed.), Report of the Locomotive committee on standard locomotives for Indian railways (2nd revised edition ed.), London {{citation}}: |edition= has extra text (help); Check date values in: |date= (help)
• Leslie S. Robertson (1907-02), British Standards Institution (ed.), Second report of the Locomotive committee on standard locomotives for Indian railways, London {{citation}}: Check date values in: |date= (help)