Central Vermont class T-3a
United States 1928 10 produced
In 1928, ALCO-Schenectady delivered ten 2-10-4 “Texas” locomotives to the Central Vermont which were relatively light for their wheel arrangement. But at 419,000 pounds for the locomotive and a total with tender of 688,600 pounds, they were still the heaviest locomotives ever in service in New England. So there are reports that they shook the ground and damaged the rails. They carried the numbers 700 to 709.
Even though the starting tractive effort calculated using the usual formula was 82,620 pounds, ALCO gives 76,800 pounds due to the limited cutoff. Additionally, the booster provided 13,100 pounds. They had thermic syphons, arch tubes and an Elasco K-50 feed water heater. They were retired between 1954 and 1959.
Technical data
General
- Built
- 1928
- Manufacturers
- ALCO
- Wheel arrangement
- 2-10-4 (Texas)
- Gauge
- 1,435 mm (Standard gauge)
Dimensions and weights
- Wheelbase
- 13.46 m
- Total wheelbase
- 25.05 m
- Service mass
- 190.1 t
- Adhesion mass
- 129.3 t
- Total mass
- 25.9 t
- Rigid wheelbase
- 6.71 m
- Axle load
- 312.3 t
- Water capacity
- 51,103 l
- Fuel capacity
- 18.1 t (coal)
Boiler
- Grate area
- 7.841 m²
- Firebox surface
- 39.298 m²
- Tube heating surface
- 397.625 m²
- Evaporative heating surface
- 436.923 m²
- Superheater surface
- 205.13 m²
- Total heating surface
- 642.1 m²
Power plant
- Driver diameter
- 1,524 mm
- Boiler pressure
- 17.2 bar
- Expansion type
- simple expansion
- Cylinders
- two, 686 x 813 mm
Power
- Power source
- steam
- Estimated power
- 3,132 kW (4,258 PS)
- Starting effort
- 367.5 kN
- Starting effort booster
- 58.272 kN
Calculated values
- Factor of adhesion
- 1 : 3.45
- Optimal speed
- 51 km/h
- Power-to-weight ratio
- 16.5 kW/t
- Heating Surface Equivalent
- 1,043.7 m²
- Cylinder volume/HSE
- 1 : 575.35
- Adhesive weight/Total
- 1 : 1.47
- Tractive force/Heating surface
- 1 : 11.95
- Grate area/Heating surface
- 1 : 81.88
- Firebox/Tube surface
- 1 : 10.12
- Total/Superheater
- 1 : 2.13
