Chicago, Burlington & Quincy 2-8-8-2 "Chesapeake" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class T-3 (Locobase 5476)

Data from locomotive diagram published on Vernon Beck's website -- [] (accessed 22 March 2003). See also DeGolyer, Volume 38, p. 197. (Thanks to Chris Hohl for his 31 December 2017 email noting the original tender capacity.) Works number was 36795 in August 1911.

Firebox heating surface included 109.3 sq ft (10.15 sq m) of combustion chamber area. The Baldwin specs say that the engine was ordered with 395 2 1/4" tubes and was fitted with a feedwater heater in the forward end of the boiler that contributed 1,461 sq ft (135.73 sq m) of surface area. The feedwater heater had 344 2 1/4" tubes, each 7 ft (2,134 mm) long. A very small reheater in that same section had 31 2" (50.8 mm) tubes chipped in 160 sq ft (14.86 sq m). All four cylinders received their steam through 15" (381 mm) piston valves.

The original tender is described as a "standard Mikado 8,200 gallon", which was quite a bit smaller than the one in the data and carried coal. It weighed 160,000 lb (72,575 kg), held 8,200 US gallons (31,037 litres) and 13 tons (11.8 metric tonnes).

Drury (1993) doesn't say much about this lone Mikado Mallet, just that it was used for hump work at Galesburg and was later converted to oil-burning and transferred to Alliance, Nebraska from which it was retired and scrapped in August 1934.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID5476
RailroadChicago, Burlington & Quincy (CB&Q)
Number in Class1
Road Numbers4200
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)15 / 4.57
Engine Wheelbase (ft / m)58.20 / 17.74
Ratio of driving wheelbase to overall engine wheebase 0.26
Overall Wheelbase (engine & tender) (ft / m)83 / 25.30
Axle Loading (Maximum Weight per Axle) (lbs / kg)52,400 / 23,768
Weight on Drivers (lbs / kg)399,900 / 181,392
Engine Weight (lbs / kg)441,400 / 200,216
Tender Loaded Weight (lbs / kg)212,700 / 96,479
Total Engine and Tender Weight (lbs / kg)654,100 / 296,695
Tender Water Capacity (gals / ML)12,000 / 45.45
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)4365 / 16.50
Minimum weight of rail (calculated) (lb/yd / kg/m)83 / 41.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)56 / 1422
Boiler Pressure (psi / kPa)200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)26" x 32" / 660x813
Low Pressure Cylinders (dia x stroke) (in / mm)40" x 32" / 1016x813
Tractive Effort (lbs / kg)92,328 / 41879.33
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.33
Heating Ability
Firebox Area (sq ft / m2)363 / 33.72
Grate Area (sq ft / m2)84 / 7.80
Evaporative Heating Surface (sq ft / m2)5283 / 490.80
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)5283 / 490.80
Evaporative Heating Surface/Cylinder Volume268.66
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation16,800
Same as above plus superheater percentage16,800
Same as above but substitute firebox area for grate area72,600
Power L12847
Power MT125.56

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