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CLASS 25
LOCOMOTIVE DETAILS
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Number Series |
25001 – 25025 |
25026 – 25082 |
25083 – 25149, 25150 - 25247 |
25248 - 25327 |
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Original Numbers |
D5151 – D5175 |
D5176 – D5232 |
D5233 – D5299, D7500 - D7597 |
D7598 – D7677 |
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Class |
25 / 0 |
25 / 1 |
25 / 2 |
25 / 3 |
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Diagram Number |
25 AV |
25 BV |
251 AV |
251 BV |
251 CX |
251 DX |
252 AV |
252 BV |
252 CX |
252 DV |
252 EX |
252 FX |
253 AV |
253 BX |
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Type |
vo |
vo |
vb |
vo |
xb |
xo |
vb |
vo |
xb |
vb |
xo |
xo |
vo |
xo |
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Weight (imperial) |
70ton 5cwt |
72ton 7cwt |
73ton 15cwt |
71ton 9cwt |
74ton 8cwt |
72ton 3cwt |
73ton 1cwt |
70ton 14cwt |
74ton 8cwt |
73ton 15cwt |
70ton 12cwt |
70ton 0cwt |
70ton 14cwt |
70ton 12cwt |
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(metric) T |
71.4 |
73.5 |
74.9 |
72.6 |
75.6 |
73.3 |
74.2 |
71.8 |
75.6 |
74.9 |
71.7 |
71.1 |
71.8 |
71.7 |
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Maximum Axle Load |
18ton 17cwt |
18ton 15cwt |
18ton 5cwt |
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18ton 12cwt |
18ton 1cwt |
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18ton 15cwt |
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18ton 1cwt |
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Train heating boiler type (Stone Vapor) |
N/A |
L4610 |
N/A |
L4610 |
N/A |
L4610 |
N/A |
L4610 |
N/A |
N/A |
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Heating Water Capacity, gal |
N/A |
580 |
N/A |
580 |
N/A |
580 |
N/A |
580 |
N/A |
N/A |
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Fuel Capacity, gal |
520 |
620 |
510 |
510 |
510 |
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Generator Type |
BTH RTB15656 |
BTH RTB15656 |
BTH RTB15656 |
BTH RTB15656 |
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Generator rating (continuous) |
817kW, 750V at 1,090A |
819kW, 780V at 1,050A |
819kW, 780V at 1,050A |
819kW, 910V at 900A |
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(1 hour) |
545V at 1,500A |
545V at 1,500A |
545V at 1,500A |
545V at 1,500A |
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(maximum) |
2,525A |
2,640A |
2,640A |
2,640A |
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Auxiliary Generator |
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AEI RTB 7440 continuous rating 50kW |
AEI RTB 7440 continuous rating 50kW |
AEI RTB 7440 cont. rating 54kW |
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Traction motors (4) type |
BTH 137BX rated 375A at 545V |
AEI 253AY rated 650A at 315V |
AEI 253AY rated 650A at 315V |
AEI 253AY rated 650A at 315V |
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Traction motor gear ratio |
79 : 18 |
67 : 18 |
67 : 18 |
67 : 18 |
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Rail hp |
949 |
949 |
949 |
949 |
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Maximum tractive effort, lb |
39,000 |
46,500 |
46,500 |
41,500 |
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Continuous tractive effort, lb/mph |
20,800/17.1 |
20,800/17.1 |
20,800/17.1 |
20,800/17.1 |
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Engine |
Sulzer 6LDA28-B pressure charged four stroke |
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Continuous rating |
1,250hp at 750 rpm |
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Maximum speed |
90 mph |
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Wheel Arrangement |
Bo - Bo |
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Length over buffers |
50ft 6in |
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Width over body |
9ft 13/8in |
Note manufacturer quotes 8ft 115/8in
for class 25/1 onwards |
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Height |
12ft 8in |
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Total wheelbase |
36ft 6in |
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Bogie wheelbase |
8ft 6in |
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Bogie pivot centres |
28ft 0in |
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Wheel diameter |
3ft 9in (45 in) |
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Minimum curvature |
41/2 ch. (297 ft.)
rad. |
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Lubricating oil capacity |
100 gal |
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Coolant |
186 gal |
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Route availability |
5 |
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Coupling restriction |
Blue Star |
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