Rolling stock use

SPREADSHEET FILE "EMPLEO"

Capacity utilization coefficients of Argentine railway locomotives and cars from 1892 to 1952. There are 36 sheets:

Sheet	Title	Datum	Remarks
A	Kms por Loc	Average, anual kilometres run by an engine, own and leased, on own and foreign lines	A = (E-F-G)/(H+I)
B	Carbón por Km	Kilograms of fuel equivalent to coal consumed per engine-kilometre	G = (K+L+M) / (E-F-G)
C	Fuerza efectiva	Realized tractive effort per engine	C = 0.122B
D	Utilización Locs	Utilization rate of locomotives in % of a theoretical maximum	D = (100A/s)(C/J)
E	E	Kilometres run by locomotives, electric trains and diesel railcars on own and foreign lines
F	F	Electric train-kms.	to deduct from E
G	G	Railcar train-kms.	to deduct from E
H	H	Own locomotives in service
I	I	Number of leased locomotives
J	J	Average tractive effort of a locomotive
K	K	Coal consumed in traction	not consumed by electric trains and railcars
L	L	Firewod consumption converted to coal-equivalent
M	M	Fuel-oil consumption converted to coal-equivalent
N	Kms por coche	Annual kilometres run by a passenger car axle, own and foreign, on own lines	N = S/Q
O	Asientos ocupados	Occupied seats in % of those available	O = 100(T/S) / (R/Q)
P	Utilización coches	Utilization rate of carriages in % of a theoretical maximum	P = 100(N/s)O
Q	Q	Number of axles in the carriage stock
R	R	Number of seats in the carriage stock
S	S	Axle-kms. run by carriages, own and foreign, on own lines
T	T	Passenger-kms. carried
U	Kms furgón	Annual kilometres run by a van's axle, own and foreign, on own lines	U=Z/X
V	Carga furgón	Goods carried in vans in % of their carrying capacity	V=100((AA+AB)/Z)/(Y/X)
W	Utilización furgón	Utilization rate of vans in % of a theoretical maximum	W=(U/s)V
X	X	Number of axles in the stock of vans
Y	Y	Carrying capacity in metric tons of the stock of vans
Z	Z	Axle-kms. run by vans, own and foreign, on own lines
AA	AA	Ton-kms. of excess baggage carried
AB	AB	Ton-kms. of parcels carried
AC	Kms vagón	Annual kilometres run by a wagon axle, own and foreign, on own lines
AD	Carga media	Goods carried in wagons in % of the wagons' capacity	AD=(100AI/AH)/(AG/AF)
AE	Utilización vagones	Utilization rate of wagons in % of a theoretical maximum	AE=(AC/s)AD
AF	AF	Number of axles in the wagon stock
AG	AG	Carrying capacity in metric tons of the wagon stock
AH	AH	Axle-kms. run by wagons, own and foreign, on own lines
AI	AI	Ton-kms. of goods and livestock carried
AJ	Appendix	Monthly mileage run by locomotives in each class of the Central Argentine Railway, 1921 and 1929.
AK	Notas

s = assumed normal mileage	40,000 kms. per year	Narrow gauge engine
	46,000 kms. per year	Standard gauge engine
	43,000 kms. per year	Broad gauge engine
	43,000 kms. per year	Narrow gauge carriage
	40,000 kms. per year	Standard gauge carriage
	75,000 kms. per year	Broad gauge carriage
	43,000 kms. per year	Narrow gauge van
	31,000 kms. per year	Standard gauge van
	53,000 kms. per year	Broad gauge van
	15,000 kms. per year	Narrow gauge wagon
	15,000 kms. per year	Standard gauge wagon
	17,000 kms. per year	Broad gauge wagon

	COMPARISON WITH CALCULATIONS BY THE NATIONAL RAILWAYS BOARD
	The values of s assumed in publications by the National Railways Board changed from time to time. Calculations on this file are based on a single set of assumptions, namely the values established by the Board on 7 November 1932 and applied in every year thereafter. The effect is to show changes in utilization rates not affected by changes in assumptions.
	The calculations of N, U, AC, P, W and AE are approximations.
	The Railways Board used axles-kms. of own vehicles on own and foreign lines to calculate N, U and AC. Here we use the axle-kms. of own and foreign vehicles on own lines.
	The differences are important for the Compagnie Générale, the standard gauge lines, and the Government railway from San Antonio, were the circulation of foreign vehicles was most noticeable. The effect on the average by gauge and for the national total is minimal and due only to discrepancies between the sums of own vehicle runs on foreign lines and the sums of foreign vehicle runs on own lines.
	In the case of locomotives, the Board made no deduction from train-kms. of those run without locomotives. There are no data to make that deduction before 1939/40. The Board also did not exclude fuel consumed by electric trains and diesel railcars. That could be excluded from 1939/40 on and was deducted whenever possible for earlier years.
	As for rolling-stock out of service, the utilization rate of locomotives does not reflect the proportion of engines in reserve or out of service. The utilization rates of vehicles depend on the total stock and are affected by placements out of service.