Locomotives

CLASS 25/1 WITH GANGWAY DOORS

Standard editions will be BR green with yellow panels, BR green with full yellow ends and BR Blue with yellow ends. The limited edition will be green without yellow warning panels and without the overhead warning flashes.

 

Ref.
Description
List Price
Our Price
HJ2550 Tower Models Limited Edition BR Green without yellow warning panels **LAST 9**
£599.00
£475.00
HJ2551 BR Green with yellow warning panels **LAST 7**
£599.00
£475.00
HJ2552 BR Green with full yellow ends **LAST 2**
£599.00
£475.00
HJ2553 BR Blue with yellow ends **LAST 6**
£599.00
£475.00

LOCOMOTIVE SPECIFICATION.

RTR O Gauge locomotives.
Heljan BR Class 25/1

Ready to run.

Features Include
• Highly detailed model in 1:43.5. (O Scale)
• Rotating roof fans.
• Highly detailed cab interior.
• Two powerful 5 pole motors.
• Kinematics.
• LED
• Screwlink coupling
• Directional changing lights.
• designed with sound installation in mind.
• Heavyweight model, weighing 3.0kg.

The Class 25/1 featured the new AEI 253AY traction motor, the motors were a result of the collaboration between BTH, MV and American builder Alco. This smaller, lighter motor was an attempt to market a traction motor to a worldwide audience, especially to the meter gauge lines. For Class 25 locomotives these lighter motors meant the discontinuance of other weight saving measures being built into the design. They would be highly rated, being an attempt to overcome the loss of tractive effort normally found on starting, the field divert system was also modified to allow increased capability throughout all the speed ranges.

The main generator was a 12-pole machine with the rating changed to 819kW, 780/545V, 1050/1500A at 750rpm. The four traction motors were now connected as series parallel pairs being rated at 234hp, 315V, 650A at 460rpm, with a gear ratio 18:67. Pairs of motors connected in series provided a higher maximum tractive effort (usually quoted as 45,000lb although 47,000lb could be achieved) but the downside being that a series pair connected machine was more prone to slipping that one with an all parallel grouping. Full power was available between 7 and 77.5 mph, an improvement over Class 25/0 locomotives with all other ratings unchanged from the earlier series. The traction motor’s continuous rating of 650 amps was not far removed from its one hour short term or "emergency" rating of 680 amps, and this could only be monitored manually. On heavy trains close monitoring of the ammeters was necessary to avoid motor damage. Whilst the body shell remained similar to D5151 there were a number of refinements. Relocated were the air horns to either side of the headcode panel. The cab skirt and body fairing were discontinued, though the support lugs remained. A new driving control panel was fitted. The fuel & water tanks were also redesigned with a fuel capacity of 510 gallons.

There were initially two variants of this sub-class. The vast majority were boilered and designated 251 AV. The four without train heating were designated 251BV. In due course, when it was decided to fit dual braking to a number of locomotives, those previously 251 AV became 251 CX and one of the 251 BV (25032) became 251 DX.

Original Number
Became
Original Detail
Type
Became
Type
By
Built
Service Introduction
Withdrawal Date
D5176
25026
251 AV
vb
Darlington
08/01/1963
02/11/1980
D5177
25027
251 AV
vb
Darlington
04/02/1963
09/05/1983
D5178
25028
251 AV
vb
251 CX
xb
By Nov 79
Darlington
08/02/1963
01/12/1980
D5179
25029
251 BV
vo
Darlington
11/02/1963
07/08/1977
D5180
25030
251 BV
vo
Darlington
19/02/1963
21/08/1976
D5181
25031
251 BV
vo
Darlington
04/03/1963
31/12/1977
D5182
25032
251 BV
vo
251 DX
xo
By Nov 74
Darlington
19/03/1963
10/03/1986
D5183
25033
251 AV
vb
251 CX
xb
By Mar 78
Darlington
13/04/1963
25/04/1983
D5184
25034
251 AV
vb
251 CX
xb
By Nov 78
Darlington
04/05/1963
22/12/1986
D5185
25035
251 AV
vb
251 CX
xb
By Nov 78
Darlington
25/05/1963
15/03/1987
D5186
25036
251 AV
vb
251 CX
xb
By Nov 75
Derby
23/03/1963
20/12/1982
D5187
25037
251 AV
vb
251 CX
xb
By Nov 78
Derby
23/03/1963
19/01/1987
D5188
25038
251 AV
vb
Derby
23/03/1963
31/05/1981
D5189
25039
251 AV
vb
Derby
30/03/1963
31/05/1981
D5190
25040
251 AV
vb
Derby
06/04/1963
10/11/1980
D5191
25041
251 AV
vb
Derby
04/05/1963
31/05/1981
D5192
25042
251 AV
vb
Derby
04/05/1963
08/05/1986
D5193
25043
251 AV
vb
Derby
04/05/1963
01/02/1981
D5194
25044
251 AV
vb
251 CX
xb
By Nov 77
Derby
04/05/1963
09/07/1985
D5195
25045
251 AV
vb
Derby
04/05/1963
04/10/1975
D5196
25046
251 AV
vb
Derby
11/05/1963
01/02/1981
D5197
25047
251 AV
vb
Derby
11/05/1963
07/09/1980
D5198
25048
251 AV
vb
251 CX
xb
By Nov 75
Derby
18/05/1963
24/02/1986
D5199
25049
251 AV
vb
251 CX
xb
By Nov 78
Derby
18/05/1963
08/01/1984
D5200
25050
251 AV
vb
251 CX
xb
By Nov 78
Derby
01/06/1963
25/04/1983
D5201
25051
251 AV
vb
251 CX
xb
By Nov 75
Derby
25/05/1963
18/09/1985
D5202
25052
251 AV
vb
Derby
01/06/1963
05/10/1980
D5203
25053
251 AV
vb
251 CX
xb
By Nov 75
Derby
01/06/1963
01/12/1980
D5204
25054
251 AV
vb
251 CX
xb
By Nov 74
Derby
08/06/1963
12/05/1985
D5205
25055
251 AV
vb
Derby
15/06/1963
02/11/1980
D5206
25056
251 AV
vb
Derby
22/06/1963
01/08/1982
D5207
25057
251 AV
vb
251 CX
xb
By Nov 74
Derby
22/06/1963
15/03/1987
D5208
25058
251 AV
vb
251 CX
xb
By Nov 74
Derby
22/06/1963
03/02/1987
D5209
25059
251 AV
vb
251 CX
xb
By Nov 77
Derby
22/06/1963
20/03/1987
D5210
25060
251 AV
vb
251 CX
xb
By Nov 74
Derby
22/06/1963
09/12/1985
D5211
25061
251 AV
vb
Derby
29/06/1963
02/11/1980
D5212
25062
251 AV
vb
Derby
29/06/1963
20/12/1982
D5213
25063
251 AV
vb
Derby
06/07/1963
02/11/1980
D5214
25064
251 AV
vb
251 CX
xb
By Nov 78
Derby
06/07/1963
09/12/1985
D5215
25065
251 AV
vb
Derby
20/07/1963
01/02/1981
D5216
25066
251 AV
vb
Derby
13/07/1963
21/06/1981
D5217
25067
251 AV
vb
Derby
03/08/1963
13/12/1982
D5218
25068
251 AV
vb
Derby
03/08/1963
14/07/1980
D5219
25069
251 AV
vb
Derby
10/08/1963
18/12/1983
D5220
25070
251 AV
vb
Derby
21/09/1963
02/11/1980
D5221
25071
251 AV
vb
Derby
31/08/1963
21/06/1981
D5222
25072
251 AV
vb
251 CX
xb
By Nov 79
Derby
21/09/1963
05/12/1985
D5223
25073
251 AV
vb
Darlington
06/07/1963
08/09/1981
D5224
25074
251 AV
vb
Darlington
20/07/1963
07/09/1980
D5225
25075
251 AV
vb
Darlington
27/07/1963
27/03/1983
D5226
25076
251 AV
vb
251 CX
xb
By Nov 78
Darlington
24/08/1963
12/11/1984
D5227
25077
251 AV
vb
251 CX
xb
By Jun 77
Darlington
07/09/1963
06/05/1978
D5228
25078
251 AV
vb
251 CX
xb
By Nov 79
Darlington
14/09/1963
22/09/1985
D5229
25079
251 AV
vb
251 CX
xb
By Jun 77
Darlington
05/10/1963
02/08/1983
D5230
25080
251 AV
vb
Darlington
19/10/1963
02/09/1985
D5231
25081
251 AV
vb
Darlington
14/12/1963
07/02/1982
D5232
25082
251 AV
vb
251 CX
xb
By Nov 78
Darlington
09/11/1963
10/05/1981

 

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