New Haven class Y-3
US Railroad Administration 0-8-0
United States 1920 35 produced
The New Haven operated a total of 35 of the original USRA 0-8-0 design. All were built by ALCO-Schenectady, 15 in 1920 and 1923 directly for the New Haven and 20 in 1922 originally for the Central New England. The specs given in the diagrams of the operator differ a bit from the original USRA diagrams, most notable a boiler pressure of 190 instead of 175 psi. The firebox surface given below contains three arch tubes with a total area of 18 square feet. They were retired between 1949 and 1952.
Technical data
General
- Built
- 1920-1923
- Manufacturers
- ALCO
- Wheel arrangement
- 0-8-0 (Eight-coupled)
- Gauge
- 1,435 mm (Standard gauge)
Dimensions and weights
- Length
- 21.33 m
- Wheelbase
- 4.57 m
- Total wheelbase
- 16.17 m
- Service mass
- 99.3 t
- Adhesion mass
- 99.3 t
- Total mass
- 172.8 t
- Rigid wheelbase
- 4.57 m
- Axle load
- 25.9 t
- Water capacity
- 33,122 l
- Fuel capacity
- 11.8 t (coal)
Boiler
- Grate area
- 4.366 m²
- Firebox surface
- 18.952 m²
- Tube heating surface
- 233.558 m²
- Evaporative heating surface
- 252.511 m²
- Superheater surface
- 60.573 m²
- Total heating surface
- 313.1 m²
Power plant
- Driver diameter
- 1,295 mm
- Boiler pressure
- 13.1 bar
- Expansion type
- simple expansion
- Cylinders
- two, 635 x 711 mm
Power
- Power source
- steam
- Estimated power
- 1,100 kW (1,496 PS)
- Starting effort
- 246.5 kN
Calculated values
- Factor of adhesion
- 1 : 3.95
- Optimal speed
- 27 km/h
- Power-to-weight ratio
- 11.1 kW/t
- Heating Surface Equivalent
- 468.4 m²
- Cylinder volume/HSE
- 1 : 961.67
- Adhesive weight/Total
- 1 : 1.00
- Tractive force/Heating surface
- 1 : 16.44
- Grate area/Heating surface
- 1 : 71.71
- Firebox/Tube surface
- 1 : 12.32
- Total/Superheater
- 1 : 4.17
