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110:
weighed only 1,829 pounds (830 kg), 322 lb (146 kg) lighter than a Boxpok design of the same diameter and equivalent strength. Using a 100-long-ton (100 t) vertical press, load testing was conducted of the strength and elasticity of the SCOA-P wheel centre against a 2,021 lb
86:
experiencing fatigue problems with conventional spoked wheels. Stronger Boxpok type 'B' wheels had been installed on a number of VR locomotive classes in the late 1940s, but they had the disadvantage of being relatively heavy and also restricted maintenance access to axleboxes, underslung springs,
119:). The tests revealed that the SCOA-P wheel was still elastic at 23.4 long tons (23.8 t), with a permanent set occurring at about 30 long tons (30 t), whereas the conventional spoked wheel experienced permanent set at 20 long tons (20 t).
190:, which built the VR J class, built SCOA-P wheeled locomotives for export until ceasing steam locomotive production in 1956, this wheel type was also seen in many of Vulcan's other export markets.
98:
pin removal difficult. The SCOA-P wheel was developed to allow the strength of the Boxpok design but also provide the maintenance access of a conventional spoked wheel.
193:
SCOA-P wheel centres were found on locomotives for the Gold Coast
Railway in Africa (WM and YL classes), East African Railways (30 and 31 classes), Iran Railways'
177:
170:
94:, which had a relatively heavy 19.5-long-ton (19.8 t) axle load, but it had been discovered that the use of a Boxpok wheel would make
38:, the SCOA-P spoke is hollow, with a U-shaped cross section. They are considerably lighter than a conventional spoked wheel or
317:
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239:
150:
305:
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locomotive that had the same diameter, but was engineered for a lower 17.5-long-ton (17.8 t)
336:
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8:
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and in some cases boiler washout plugs. Boxpok wheels were proposed for the forthcoming
83:
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28:
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locomotives, introduced in 1951 and 1954 respectively. They were also used on the
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330:
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55:
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95:
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16:
50:
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39:
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111:(917 kg) conventional spoked driving wheel centre of an
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35:
31:
270:
australiansteam.com
Tasmanian Preserved Steam Locomotives
78:
ustralia Ltd (the P in the acronym standing for F. C.
62:
SCOA-P wheels were developed in the late 1940s by the
197:
Decapod, and a class of Indian
Government Railways'
328:
306:Vulcan Foundry Locomotive List - Iranian Decapod
257:
229:
82:aynter, who patented the design) in response to
142:SCOA-P wheels were used on Victorian Railways'
318:Vulcan Foundry Locomotive List - No 6096-9125
253:
251:
106:The SCOA-P wheel centre of a 73-inch R class
248:
101:
230:Carlisle, R M & Abbott, R L (1985).
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49:
15:
34:. Rather than having traditional solid
329:
282:Nairobi Railway Museum - 3020 Nyaturu
42:wheel of the same size and strength.
294:Nairobi Railway Museum - 3123 Bavuma
13:
201:T tank locomotives, among others.
14:
348:
311:
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287:
275:
263:
223:
1:
216:
168:Tasmanian Government Railways
27:pattern wheels are a type of
54:SCOA-P wheel centre detail (
7:
320:- retrieved 30 October 2006
308:- retrieved 30 October 2006
296:- retrieved 30 October 2006
284:- retrieved 30 October 2006
272:- retrieved 30 October 2006
258:Carlisle & Hudson Power
204:
10:
353:
133:Victorian Railways R class
89:Victorian Railways R class
45:
131:SCOA-P driving wheels on
138:steam locomotive R 761.
102:Comparative performance
139:
122:
59:
21:
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53:
20:SCOA-P driving wheels
19:
234:. ARHS. p. 30.
158:Queensland Railways
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84:Victorian Railways
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29:steam locomotive
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188:Vulcan Foundry
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241:0-85849-028-5
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108:driving wheel
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337:Train wheels
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260:, p. 31
232:Hudson Power
231:
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211:Boxpok wheel
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186:Because the
185:
141:
105:
96:coupling rod
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75:
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63:
61:
24:
23:
161:BB18¼ class
217:References
117:axle load
331:Category
205:See also
113:A2 class
58:removed)
178:H class
171:M class
151:J class
144:R class
70:ompany
46:History
238:
195:2-10-2
40:Boxpok
36:spokes
25:SCOA-P
199:2-8-4
181:4-8-2
174:4-6-2
164:4-6-2
154:2-8-0
147:4-6-4
136:4-6-4
92:4-6-4
66:teel
32:wheel
236:ISBN
176:and
166:and
149:and
56:tyre
123:Use
333::
250:^
183:.
74:f
244:.
80:P
76:A
72:o
68:C
64:S
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