Detroit & Mackinac 4-6-0 "Ten-wheeler" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 22 (Locobase 12353)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 22, p. 115. See also Michigan Railroads on line, especially Irl Baguley, Auditor, Detroit, Caro & Southern and his account in (for the ) and the D & M home page. Works number was 16903-16904 in July 1899, 18078 in August 1900, and 18084 in September.

The D & M took its name in 1894 following a reorganization of the bankrupt Detroit, Bay City & Alpena. Starting from Bay City at the curve of the thumb, the line followed the Lake Huron coastline 131 miles north to Alpena. A year later, the D & M took over the Alpena & Northern which extended the coastal route another 65 miles to Cheboygan.

Photographs show an upright, relatively short-coupled design. Although 6 locomotives of essentially identical design formed the class,, wheel diameter separates this mixed-traffic quartet from the frankly freight pair in Locobase 12354.

131, 134-135 later operated on the Detroit, Caro & Sandusky as 17 and 134-135. The DC & S represented a 1925 re-organization of the bankrupt Detroit, Bay City & Western and extended southeast from Bay City to Fargo. (The DC & S didn't have the money to rebuild the wooden trestle over Mill Creek south of

Class 27 (Locobase 12354)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 22, p. 115. Works number was 19963-19964 in January 1902.

See Locobase 12353 for a history of the D & M and the Detroit, Caro &

Southern. Built to the same design as the previous 4 Ten-wheelers, this pair had much smaller drivers and were thus dedicated to freight service.

135 later was sold to the DC & S, but retained its number.

Specifications by Steve Llanso of Sweat House Media
Locobase ID12,353 12,354
RailroadDetroit & MackinacDetroit & Mackinac
Number in Class64
Road Numbers22-25, 27-28 / 131-134, 136, 13527-28 / 135-136
Number Built64
BuilderBurnham, Williams & CoBurnham, Williams & Co
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)11.6711.67
Engine Wheelbase (ft)21.9221.92
Ratio of driving wheelbase to overall engine wheebase 0.53 0.53
Overall Wheelbase (engine & tender) (ft)
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)90,00087,850
Engine Weight (lbs)120,000115,750
Tender Loaded Weight (lbs)75,000
Total Engine and Tender Weight (lbs)195,000
Tender Water Capacity (gals)35004000
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)5049
Geometry Relating to Tractive Effort
Driver Diameter (in)6550
Boiler Pressure (psi)180180
High Pressure Cylinders (dia x stroke) (in)18" x 24"18" x 24"
Tractive Effort (lbs)18,30423,795
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.92 3.69
Heating Ability
Firebox Area (sq ft)132.10132.10
Grate Area (sq ft)22.8022.80
Evaporative Heating Surface (sq ft)15391539
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)15391539
Evaporative Heating Surface/Cylinder Volume217.72217.72
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation41044104
Same as above plus superheater percentage41044104
Same as above but substitute firebox area for grate area23,77823,778
Power L160684667
Power MT445.92351.36

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