FC Andino / Buenos Aires Pacific 4-6-0 Locomotives in Argentina


Class Details by Steve Llanso of Sweat House Media

Class 25/1451 (Locobase 10980)

Data from DeGolyer, Volume 27, p.183 and Volume 28, p. 185 and Record of Recent Construction #54 (Baldwin Locomotive Works, 1905), p. 10-11. Works numbers were 24994-24996 in January 1905; 27049, 27056 in December.

This quintet was built for the same service as the North British engines shown in Locobase 3664. The Baldwins were slightly larger and had a little more heating surface, but they shared the same simple lines and Belpaire firebox. Baldwin's specification required the locomotive to haul 300 long tons (336 short tons) up a 1/1% ruling grade at 16 kph (10 mph). (Curve radii were never tighter than 1,000 meters)

Inside-admission, balanced piston valves measured 10" (254 mm) in diameter. Valve gear was controlled by a Belpaire lever and screw reverser.

Principal Dimensions by Steve Llanso of Sweat House Media

Class25/1451
Locobase ID10980
RailroadFC Andino / Buenos Aires Pacific
CountryArgentina
Whyte4-6-0
Number in Class5
Road Numbers25-29/1451-1455
Gauge5'6"
Number Built5
BuilderBurnham, Williams & Co
Year1905
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)11.67 / 3.56
Engine Wheelbase (ft / m)22.67 / 6.91
Ratio of driving wheelbase to overall engine wheelbase 0.51
Overall Wheelbase (engine & tender) (ft / m)48.62 / 14.82
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)103,750 / 47,060
Engine Weight (lbs / kg)136,450 / 61,893
Tender Loaded Weight (lbs / kg)77,550 / 35,176
Total Engine and Tender Weight (lbs / kg)214,000 / 97,069
Tender Water Capacity (gals / ML)3963 / 15.01
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)6 / 5.50
Minimum weight of rail (calculated) (lb/yd / kg/m)58 / 29
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)68 / 1727
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)19" x 26" / 483x660
Tractive Effort (lbs / kg)21,119 / 9579.43
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.91
Heating Ability
Tubes (number - dia) (in / mm)272 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)13.42 / 4.09
Firebox Area (sq ft / m2)151 / 14.03
Grate Area (sq ft / m2)29.50 / 2.74
Evaporative Heating Surface (sq ft / m2)2050 / 190.45
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)2050 / 190.45
Evaporative Heating Surface/Cylinder Volume240.27
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5310
Same as above plus superheater percentage5310
Same as above but substitute firebox area for grate area27,180
Power L16707
Power MT427.56

All material Copyright © SteamLocomotive.com
Wes Barris