McCloud River No. 24 and 25
United States 1925 2 produced
The last four steam engines the McCloud River Railroad purchased in 1925 were oil-fired and made by ALCO. The numbers 20 and 21 from 1924 already had the wheel arrangement 2-6-2 and came from Baldwin. Then numbers 22 and 23 with the same wheel arrangement came from ALCO. The numbers 24 and 25, which were again delivered in the same year, had two inches larger driving wheels and larger cylinders to compensate.
They were in service with logging operations until the mid-1950s, when steam operations ended at the McCloud. Number 25 was reactivated in 1962 for excursion trips. After operating on its original route with some interruptions until 2001, it joined the Oregon Coast Scenic Railroad in 2011 and is still in service today.
Technical data
General
- Built
- 1925
- Manufacturers
- ALCO
- Wheel arrangement
- 2-6-2 (Prairie)
- Gauge
- 1,435 mm (Standard gauge)
Dimensions and weights
- Wheelbase
- 7.82 m
- Service mass
- 66.7 t
- Adhesion mass
- 54 t
- Total mass
- 206.5 t
- Rigid wheelbase
- 2.97 m
- Water capacity
- 15,142 l
- Fuel capacity
- 0.8 t (oil)
Boiler
- Grate area
- 2.806 m²
- Firebox surface
- 13.657 m²
- Tube heating surface
- 101.729 m²
- Evaporative heating surface
- 115.386 m²
- Superheater surface
- 24.712 m²
- Total heating surface
- 140.1 m²
Power plant
- Driver diameter
- 1,168 mm
- Boiler pressure
- 12.4 bar
- Expansion type
- simple expansion
- Cylinders
- two, 483 x 610 mm
Power
- Power source
- steam
- Estimated power
- 895 kW (1,217 PS)
- Starting effort
- 128.2 kN
Calculated values
- Factor of adhesion
- 1 : 4.13
- Optimal speed
- 43 km/h
- Power-to-weight ratio
- 13.4 kW/t
- Heating Surface Equivalent
- 233.1 m²
- Cylinder volume/HSE
- 1 : 956.77
- Adhesive weight/Total
- 1 : 1.24
- Tractive force/Heating surface
- 1 : 19.11
- Grate area/Heating surface
- 1 : 49.93
- Firebox/Tube surface
- 1 : 7.45
- Total/Superheater
- 1 : 4.67
