-
Tracfive effort and speed curve of the North Africa Railway locomotive.
bronze bushings pressed into the eye of the con-
necting rod.
Cylinder heads are individual casings. Each
head is attached to the engine frame by heat-
treated alloy steel studs. The valve mechanism is
forced lubricated and enclosed by covers. The
camshaft, which actuates the valves through
A group composed of French North African Railway
Mission officials and Baldwin representatives pose
beside the newly christened locomotive.
end of the engine.
The crankshaft consists of a heat-treated solid
steel forging which is drilled for pressure lubrica-
tion. It is supported in interchangeable bearing
shells which are lined with centrifugally cast
babbitt. All shells are removable, through the in-
spection ports, without lifting the crankshaft.
The fuel injection system is of the solid injec-
tion type with spring-loaded, multi-hole spray
nozzles. An individual fuel injection pump is
mounted on each cylinder. The lubricating oil
is circulated by a positive displacement gear
pump, chain-driven from the crankshaft.
The quantity of fuel delivered by the injection
pumps, and hence the speed of the diesel engine,
is controlled by the hydraulic relay type governor
which is driven from the camshaft. The governor
is manually controlled from the linkage between
the operator's compartment and the engine. An
independent over-speed stop, geared to the cam-
shaft, acts positively to close all fuel racks in case
of emergency.
The control equipment functions electro-pneu-
matically in operating the four traction motors
from the generator. The transition from full field
to shunted field is made automatically at the
proper operating condition.
The general characteristics of the locomotives
are as follows:
Gauge.....................................................................4'-8 1/2"
Diesel engine, one 8 cylinder-in-line (supercharged) 1,500 hp
Driving motors, number......................................................4
Driving motors, maximum speed restriction................60 mph
Driving motors, gear ratio............................................15:63
Driving wheels, number..............................................4 pairs
Idling wheels..............................................................2 pairs
Driving wheels, diameter.................................................42"
Weight, total, in working order............................276,000 lb
Weight, total light................................................258,000 lb
Wheel base, each truck (swing-bolster).....................11'- 6"
Wheel base, total locomotive....................................43'- 9"
Maximum overall dimensions of locomotives:
Height......................................................................14'- 0"
Width.......................................................................10'- 2"
Length (inside Knuckles)..........................................58'- 0"
Starting tractive effort (30% adhesion)..................55,000 lb
Continuous rating at 10.6 mph..............................42,800 lb
On the occasion of this christening ceremony,
Ralph Kelly, President of Baldwin, stated that
steam locomotives also are a major item in the
French Railway program. Baldwin is completing
orders for a total of 460 steam locomotives of the
2-8-2 type, many of which are already hard at
work on the task of rehabilitating the railways of
Continental France.