Bangor & Aroostook 4-6-2 "Pacific" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class F (Locobase 6615)

Data out of 1938 BAR locomotive diagram book provided in May 2005 from Allen Stanley's extension collection.

Curiously, the diagram notes the type of superheater and the number of flues, but not the area. Locobase estimates the area as 660 sq ft based on other superheater installations on similar locomotives.

Specifications by Steve Llanso of Sweat House Media
ClassF
Locobase ID6615
RailroadBangor & Aroostook
CountryUSA
Whyte4-6-2
Number in Class5
Road Numbers250-254
GaugeStd
Number Built5
BuilderAlco-Schenectady
Year1927
Valve GearBaker
Locomotive Length and Weight
Driver Wheelbase (ft / m)12 / 3.66
Engine Wheelbase (ft / m)21.75 / 6.63
Ratio of driving wheelbase to overall engine wheebase 0.55
Overall Wheelbase (engine & tender) (ft / m)69.62 / 21.22
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)141,000 / 63,957
Engine Weight (lbs / kg)237,000 / 107,502
Tender Loaded Weight (lbs / kg)161,000 / 73,028
Total Engine and Tender Weight (lbs / kg)398,000 / 180,530
Tender Water Capacity (gals / ML)8500 / 32.20
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)12 / 10.90
Minimum weight of rail (calculated) (lb/yd)78
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)69 / 1753
Boiler Pressure (psi / kPa)210 / 14.50
High Pressure Cylinders (dia x stroke) (in / mm)21" x 28" / 533x711
Tractive Effort (lbs / kg)31,944 / 14489.57
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.41
Heating Ability
Firebox Area (sq ft / m2)230 / 21.38
Grate Area (sq ft / m2)52 / 4.83
Evaporative Heating Surface (sq ft / m2)2671 / 248.23
Superheating Surface (sq ft / m2)660 / 61.34
Combined Heating Surface (sq ft / m2)3331 / 309.57
Evaporative Heating Surface/Cylinder Volume237.96
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation10,920
Same as above plus superheater percentage13,104
Same as above but substitute firebox area for grate area57,960
Power L121,001
Power MT985.09

Photos