Buffalo, Rochester, & Pittsburgh 2-8-8-2 "Chesapeake" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class XX (Locobase 314)

Data from Locomotive Cyclopedia 1930. See also the Salamanca (NY) Republican Press's description of these engines quoted in "New Engines are Awe-Inspiring," Buffalo, Rochester & Pittsburgh Railway Employes [sic] Magazine, Vol 6, No 4 (April 1918), pp. 45-48 . (Thanks to Chris Hohl for noting the valve gear ID.) Works numbers 58017-58022 in March 1918, 58498 in April and 64617-64618 in August 1923.

According to a New York State legislative report from 1918 (Legislative Document By New York (State) Legislature, J.B. Lyon Co. New York (State), 1919 v.9 no.14 pt.1 , the BR & P was planning to buy 15 of these for just over $1 million. Seven were produced in April 1918 and two more in September 1923.

Other than the Triplexes built for the Erie and the Virginian and the latter's AE 2-10-10-2s (Locobase 417), these Mallet compounds had the most total cylinder volume of any built-from-scratch locomotive. They were rated at 140 empties or 70 loaded cars over the Clarion Junction-Freeman section, which included a 58 ft/mile (1.1%) that went on for 17 miles (27.4 km).

The Salamanca paper described these engines as "one of the biggest locomotives in the world-a veritable giant, to stand beside which turns one's thoughts towards Gulliver's land of Brobdingnag." It points out that wrangling such a beast required a power reverse [Ragonnet & Mellin] and automatic stoker [Duplex]. About the latter, a representative of Pittsburgh's Locomotive Stoker Company, William Crowe, claimed that it raised the efficiency of the engine from 55 or 60 up to 90 or 95 percent while reducing the fireman's labor by 85 percent.

(The Buffalo, Rochester & Pittsburgh was an independent railroad until bought out by the B&O in 1932. In B&O service, these Mallets were known as EE-2. )

Specifications by Steve Llanso of Sweat House Media
ClassXX
Locobase ID314
RailroadBuffalo, Rochester, & Pittsburgh (B&O)
CountryUSA
Whyte2-8-8-2
Number in Class9
Road Numbers800-808
GaugeStd
Number Built9
BuilderAlco-Brooks
Year1918
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft)15.50
Engine Wheelbase (ft)57.42
Ratio of driving wheelbase to overall engine wheebase 0.27
Overall Wheelbase (engine & tender) (ft)91.40
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)502,500
Engine Weight (lbs)575,000
Tender Loaded Weight (lbs)205,600
Total Engine and Tender Weight (lbs)780,600
Tender Water Capacity (gals)12,000
Tender Fuel Capacity (oil/coal) (gals/tons)14
Minimum weight of rail (calculated) (lb/yd)105
Geometry Relating to Tractive Effort
Driver Diameter (in)57
Boiler Pressure (psi)200
High Pressure Cylinders (dia x stroke) (in)28" x 32"
Low Pressure Cylinders (dia x stroke) (in)44" x 32"
Tractive Effort (lbs)106,514
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.72
Heating Ability
Firebox Area (sq ft)479
Grate Area (sq ft)99.20
Evaporative Heating Surface (sq ft)6625
Superheating Surface (sq ft)1632
Combined Heating Surface (sq ft)8257
Evaporative Heating Surface/Cylinder Volume290.50
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation19,840
Same as above plus superheater percentage23,808
Same as above but substitute firebox area for grate area114,960
Power L17999
Power MT280.75

Reference


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