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Record: 10235 (26/09/2023)
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MR/LMS Johnson "483" Class 4-4-0
General
Designer |
Samuel Johnson |
Rebuilt By |
Fowler |
Introduced |
1912 |
Pre-Grouping Company |
Midland Railway |
Grouping Company |
London, Midland & Scottish Railway |
Wheel Arrangement |
4-4-0 |
Number Built as 483 |
0 |
Conversions from other classes |
157 |
Manufacturers |
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Power
Variant Introduced |
1912 |
Inside Cylinders |
20.5" x 26" (2 off) |
Wheels
Pony |
3' 61⁄2" |
Drivers |
7' 01⁄2" |
Locomotive Wheelbase |
22' 81⁄2" |
Descriptive Wheelbase |
6' 0" + 7' 2½" + 9' 6" = 22' 8½" (engine only) |
Dimensions
Weight (loco only) |
53t 7cwt |
Boiler & Firebox
Boiler Diagram |
G7S |
Boiler Max Diameter |
4' 8" |
Boiler Barrel Length |
10' 6" |
Boiler Pressure |
180lbs |
Firebox Type |
Belpaire |
Firebox Length |
7' |
Total Evaporative Area |
1170ft2 |
Superheater Element Area |
313ft2 |
Total Heating Area |
1483ft2 |
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