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for a 1Co+Co1 locomotive. However, the use of a bogie with an integral pony truck was not universally accepted by ALCO's engineering management. The result was that ALCO bid on only the Co+Co option and lost out to GE, who had bid on both options. In South Africa, this virtually opened the floodgates for GE, since more than half of the SAR's vast
143:
had a design on paper for a 1Co bogie which could be utilised by either ALCO or GE and which would enable the SAR's specification to be met for the heavier 1,800 horsepower (1,300 kilowatts) units. The SAR made it clear that, despite the two options afforded by the tender, its strong preference was
231:
locomotive on the 1Co bogies of the Class 32-000, which reduced its axle load from the 15,749 kilograms (15.5 long tons) of the Class 33-000 to 12,700 kilograms (12.5 long tons). Apart from the bogies, which necessitated a smaller fuel tank, its physical dimensions and exterior appearance were
35:
with an articulated inter-bogie connection, each with three axles powered by a separate traction motor per axle and with the fourth non-powered axle in an integral leading pony truck to reduce the axle load. The similar
138:
and had a strong preference for ALCO's Model 251 engine and GE's transmission systems. As a prior supplier of steam locomotives for the SAR, ALCO appeared to be virtually assured of receiving the order.
220:, where very light rail conditions necessitated lighter axle loadings which could not be achieved with conventional three-axle bogies under a heavy 96,520 kilograms (95 long tons) locomotive.
184:(NBL) between 1952 and 1953. The Class 4E was amongst the most powerful electric locomotives in the world at that time and at 157,488 kilograms (155 long tons), it was a heavy locomotive for
62:
279:
South
African Railways Index and Diagrams Electric and Diesel Locomotives, 610mm and 1065mm Gauges, Ref LXD 14/1/100/20, 28 January 1975, as amended
381:
131:
324:
391:
108:(GE) in the locomotive building business. In 1957, the South African Railways (SAR) called for tenders with two options.
16:
181:
354:
198:. The reasons for the leading pony truck were both to improve stability at speed and to reduce the axle load.
386:
376:
101:
228:
224:
213:
205:
145:
97:
56:
20:
227:
GE type U20C1 diesel-electric locomotives entered service on the SAR. The Class 32-200 was actually a
85:. This was accomplished by the addition of a non-powered axle in an integral pony truck to the three
51:
77:
The 1Co+Co1 wheel arrangement for electric and diesel-electric locomotives was a development of the
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135:
93:
81:
wheel arrangement to enable a relatively heavy locomotive to work on light rail by reducing the
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classification is in the same axle configuration, but without the inter-bogie connection.
8:
350:
320:
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Under the
British and Imperial classification scheme of locomotive axle arrangements
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115 1,800 horsepower (1,300 kilowatts) locomotives with a 1Co+Co1 wheel arrangement.
105:
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identical to that of the Co+Co Class 33-000 and it used the same V12 prime mover.
240:
31:
is a classification code for a locomotive wheel arrangement of two eight-wheeled
115:
230 1,000 horsepower (750 kilowatts) locomotives with a Co+Co wheel arrangement.
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252:
A number of
Japanese electrics from the 1930s, also on Cape gauge, such as the
245:
86:
370:
201:
119:
194:
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fleet which would be acquired between 1959 and 1981 were GE products.
82:
161:
39:
78:
349:(1st ed.). Cape Town: Struik. pp. 126–127, 138–139.
32:
100:
is credited with being a major factor in the demise of the
302:
The
American Locomotive Company - A Centennial Remembrance
216:
GE type U18C1 diesel-electric locomotives in service in
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269:
212:
Between 1959 and 1961, the SAR placed 115 high-nosed
319:. Melbourne University Publishing Ltd. p. 212.
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electric locomotive was designed for the SAR by the
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130:The SAR was not very enthusiastic about the
347:Locomotives of the South African Railways
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118:
15:
369:
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132:General Motors Electro-Motive Division
47:Other equivalent classifications are:
345:Paxton, Leith; Bourne, David (1985).
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223:In June and July 1966, ten low-nosed
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282:
13:
317:The Railways of Victoria 1854-2004
14:
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182:North British Locomotive Company
156:
1:
259:
256:also used this arrangement.
7:
392:Commonwealth classification
180:(GEC) and was built by the
102:American Locomotive Company
72:
10:
408:
146:diesel-electric locomotive
98:South African Class 32-000
21:South African Class 32-000
382:(1′Co)+(Co1′) locomotives
235:
186:3 ft 6 in
178:General Electric Company
151:
94:United States of America
300:Steinbrenner, Richard.
104:(ALCO) and the rise of
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209:
169:
141:General Steel Castings
127:
124:General Steel Castings
24:
243:
204:
164:
122:
19:
315:Lee, Robert (2007).
387:1Co+Co1 locomotives
377:1-C+C-1 locomotives
250:
210:
170:
128:
89:Co powered bogie.
63:UIC classification
52:AAR classification
25:
326:978-0-522-85134-2
218:South West Africa
136:two-cycle engines
399:
361:
360:
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106:General Electric
87:traction motored
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208:diesel-electric
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23:diesel-electric
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190:1,067 mm
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67:(1′Co)+(Co1′)
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22:
18:
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229:Class 33-000
225:Class 32-200
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214:Class 32-000
211:
206:Class 32-200
172:The 3 kV DC
171:
157:South Africa
129:
91:
76:
66:
55:
46:
37:
28:
26:
371:Categories
356:0869772112
260:References
195:Cape gauge
244:Japanese
83:axle load
174:Class 4E
168:electric
166:Class 4E
73:Overview
248:in 1938
126:' bogie
92:In the
57:1-C+C-1
40:1Co-Co1
29:1Co+Co1
353:
323:
134:(EMD)
96:, the
33:bogies
236:Japan
152:Usage
79:Co+Co
351:ISBN
321:ISBN
254:EF10
246:EF10
373::
335:^
284:^
268:^
192:)
65::
54::
359:.
329:.
304:.
188:(
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