Banner
Navigation

Navigation

loco-info.com
The reference for locomotives and railcars

Boston & Maine No. 54 to 61

Boston & Maine class A

United States 1872 8 produced
No. 55 “Forest City”

In 1872 and 1873, Manchester Locomotive Works built eight 4-4-0 locomotives for the Boston & Maine. They carried the works numbers 455 to 462 and received the running numbers 54 to 61. The names of these individual locomotives did not follow a common rule and were “Sachem”, “Forest City”, “Francis Cogswell”, “Minerva”, “William Merritt”, “Columbia”, “Pepperell” and “Old Orchard”.

At 66 inches, the drivers were in the same range to those found on most 4-4-0 of the Boston and Maine. The cylinders measured 17 by 22 inches. All were later reboilered, the first one in 1885. When they were renumbered in 1911, one had already been scrapped and the others received the numbers 641 to 647. After this it did not take long until the rest was scrapped and by 1915, all were gone.

Technical data

General

Built
1872-1873
Manufacturers
Manchester Locomotive Works
Wheel arrangement
4-4-0 (American)
Gauge
1,435 mm (Standard gauge)

Dimensions and weights

Service mass
38.6 t
Adhesion mass
24.9 t
Total mass
61.2 t
Rigid wheelbase
2.44 m
Axle load
12.5 t
Water capacity
10,221 l
Fuel capacity
5.4 t (coal)

Boiler

Grate area
1.505 m²
Firebox surface
12.774 m²
Tube heating surface
96.852 m²
Evaporative heating surface
109.626 m²
Total heating surface
109.6 m²

Power plant

Driver diameter
1,676 mm
Boiler pressure
10.3 bar
Expansion type
simple expansion
Cylinders
two, 432 x 559 mm

Power

Power source
steam
Estimated power
298 kW (405 PS)
Starting effort
54.6 kN

Calculated values

Factor of adhesion
1 : 4.48
Optimal speed
34 km/h
Power-to-weight ratio
7.7 kW/t
Heating Surface Equivalent
173.5 m²
Cylinder volume/HSE
1 : 943.30
Adhesive weight/Total
1 : 1.55
Tractive force/Heating surface
1 : 10.41
Grate area/Heating surface
1 : 72.84
Firebox/Tube surface
1 : 7.58
Auf Deutsch umschalten

Settings

Your settings are retained for this browser session only.

Consent to cookies

We use cookies to save your display settings. If you decline, the settings are retained only for the current browser session.