Detroit & Mackinac 2-8-0 "Consolidation" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class 29 (Locobase 16404)

Data from "Detroit & Mackinac Consolidation Locomotives", Railway Gazette, Volume 36 No 4 (11 January 1904), p. 70. Works numbers were 29290-29291 in November 1903.

RG's report noted that the railroad's improvments in grades and "alinements" (a revised spelling of "alignment" adopted in the same spirit as the dropping of the "u" in "gauge") would allow 70-80 car trains and bought new equipment accordingly.

These engines were produced soon after the first three of a larger class ordered by the Virginia & Southwestern (Locobase 16405). So, either the D&M bought a pair that the V&S couldn't afford two more right away or the Michigan railroad thought they'd be sufficient.

Apparently, they were not quite the ticket for the D&M for they bought three more powerful 2-8-0s from Rogers (Locobase 12427) three years later. By then, this pair had been sold to the Virginia & Southwestern in 1905 as their 66-67. Taken into the Southern Railway, the pair took numbers 211-212 in 1916.

They served the Southern into the 1930s before being scrapped in November 1933 (212) and February 1936 (211).


Class 33 (Locobase 12427)

Data from "New Locomotive Equipment-Detroit & Mackinac", Railway Age, Volume 41, No 10 (11 May 1906), p. 807. Works numbers were 40696-40698 in September 1906.

These remained in service on the D&M for over four decades before being scrapped in March 1947.

Principal Dimensions by Steve Llanso of Sweat House Media
Class2933
Locobase ID16,404 12,427
RailroadDetroit & MackinacDetroit & Mackinac
CountryUSAUSA
Whyte2-8-02-8-0
Number in Class33
Road Numbers29-3033-35/150-152
GaugeStdStd
Number Built33
BuilderAlco-SchenectadyAlco-Rogers
Year19031906
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)14.33 / 4.37
Engine Wheelbase (ft / m)22.25 / 6.78
Ratio of driving wheelbase to overall engine wheebase 0.64
Overall Wheelbase (engine & tender) (ft / m)52.15 / 15.90
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)151,000 / 68,493171,000 / 77,564
Engine Weight (lbs / kg)168,000 / 76,204192,600 / 87,362
Tender Loaded Weight (lbs / kg)120,000 / 54,431
Total Engine and Tender Weight (lbs / kg)288,000 / 130,635
Tender Water Capacity (gals / ML)6000 / 22.734000 / 15.15
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)11 / 1011 / 10
Minimum weight of rail (calculated) (lb/yd / kg/m)63 / 31.5071 / 35.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)51 / 129557 / 1448
Boiler Pressure (psi / kPa)200 / 13.80190 / 13.10
High Pressure Cylinders (dia x stroke) (in / mm)21" x 26" / 533x66023" x 28" / 584x711
Tractive Effort (lbs / kg)38,220 / 17336.3241,967 / 19035.93
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.95 4.07
Heating Ability
Firebox Area (sq ft / m2)212.50 / 19.74218 / 20.26
Grate Area (sq ft / m2)34.25 / 3.1835.87 / 3.33
Evaporative Heating Surface (sq ft / m2)2773 / 257.623100 / 288.10
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)2773 / 257.623100 / 288.10
Evaporative Heating Surface/Cylinder Volume266.05230.24
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation68506815
Same as above plus superheater percentage68506815
Same as above but substitute firebox area for grate area42,50041,420
Power L162565617
Power MT365.35289.67

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