Seaboard Air Line class D-3
United States 1930 8 produced
The class D-3 consisted of eight light Decapods built in 1930 for the Seaboard Air Line. They were ordered after the SAL had leased the Georgia, Florida & Alabama in 1927 and found out about the versatility of their six light Decapods. Actually, the new ones were virtually identical and could deliver high tractive efforts on branch lines with an axle load of only 19 tons. They were numbered 529 to 536 and retired in 1952 and 1953. After that, the Gainesville Midland bought a total of seven of both the original and the new class. No. 209, the original SAL 533, was preserved and is on display at Gainesville.
Technical data
General
- Built
- 1930
- Manufacturers
- Baldwin
- Wheel arrangement
- 2-10-0 (Decapod)
- Gauge
- 1,435 mm (Standard gauge)
Dimensions and weights
- Wheelbase
- 8.61 m
- Total wheelbase
- 18.56 m
- Empty mass
- 88.5 t
- Service mass
- 96.2 t
- Adhesion mass
- 86.2 t
- Total mass
- 158.5 t
- Rigid wheelbase
- 5.99 m
- Axle load
- 17.2 t
- Water capacity
- 26,498 l
- Fuel capacity
- 10.9 t (coal)
Boiler
- Grate area
- 5.045 m²
- Firebox surface
- 18.302 m²
- Tube heating surface
- 199.37 m²
- Evaporative heating surface
- 217.672 m²
- Superheater surface
- 51.375 m²
- Total heating surface
- 269.0 m²
Power plant
- Driver diameter
- 1,422 mm
- Boiler pressure
- 13.1 bar
- Expansion type
- simple expansion
- Cylinders
- two, 610 x 711 mm
Power
- Power source
- steam
- Estimated power
- 1,193 kW (1,622 PS)
- Starting effort
- 206.9 kN
Calculated values
- Factor of adhesion
- 1 : 4.09
- Optimal speed
- 35 km/h
- Power-to-weight ratio
- 12.4 kW/t
- Heating Surface Equivalent
- 411.9 m²
- Cylinder volume/HSE
- 1 : 1,007.80
- Adhesive weight/Total
- 1 : 1.12
- Tractive force/Heating surface
- 1 : 16.06
- Grate area/Heating surface
- 1 : 53.33
- Firebox/Tube surface
- 1 : 10.89
- Total/Superheater
- 1 : 4.24
