The Ann Arbor's two F1 Ten-wheeler were delivered with the boilers and fireboxes shown in this entry. Over time, each of the pair showed up in diagrams with different numbers of tubes and longer, narrower grates with less area; this probably resulted from rebuilds in the 1920s. In 1928, 100 had the smaller amount - 218 tubes for a total of 1,801 sq ft of heating surface. 101's boiler had 236 tubes and a total heating surface of 1,941 sq ft. Both had 14 sq ft of arch tubes contributing to the firebox heating surface.
The railroad held on their Ten-wheelers for decades. Ex-100 was scrapped in April 1951.
This pair of Ten-wheelers achieved an unusual distinction for the Ann Arbor - both engines had the same number of tubes and, as a result, the same heating surface. Never superheated, 103 (by that time renumbered 140) was scrapped in November 1928.
Locobase 8390 shows smaller F1s from Baldwin in 1899. The present pair of Ten-wheelers delivered in 1899 were intended for the New York & Ottawa, but wound up on the Ann Arbor instead.
Later renumbered 130-131, the F2s ran out their last years under Wabash colors when that railroad absorbed the Ann Arbor in 1925. They were scrapped in March 1933 and August 1940, respectively.
Continuing the line of small Ten-wheelers supplied to the Ann Arbor by Baldwin beginning in 1899, this batch came in 1902-1903 with the tube count shown.
Over the next couple of decades, the six that remained on the roster had five different tube counts. By 1928, following count and evaporative surface area:
Engine # Tubes EHS Renumbered Scrapped
106 235 1,932 November 1928
107 230 1,895 150
108 235 1,932 151 March 1951
109 268 2,180 152 March 1933
110 264 2,165 153 December 1948
111 233 1,932 154 February 1933
110 & 111 had 15 sq ft of arch tubes that increase firebox heating surface to 185 sq ft.
|Specifications by Steve Llanso of Sweat House Media|
|Railroad||Ann Arbor (AA)||Ann Arbor (AA)||Ann Arbor (AA)||Ann Arbor (AA)|
|Number in Class||2||2||1||7|
|Road Numbers||41-42/101-102||45-46/104-105/140-141||43-44/102-103/130-131||47-52 /106-111/150-154|
|Builder||Burnham, Williams & Co||Pittsburgh||Burnham, Williams & Co||Burnham, Williams & Co|
|Locomotive Length and Weight|
|Ratio of driving wheelbase to overall engine wheebase||0.55||0.56||0.56||0.55|
|Overall Wheelbase (engine & tender)||56.85'||55.73'|
|Axle Loading (Maximum Weight per Axle)|
|Weight on Drivers||90000 lbs||114000 lbs||104665 lbs||104000 lbs|
|Engine Weight||125000 lbs||140000 lbs||131240 lbs||154000 lbs|
|Tender Light Weight||105800 lbs||136500 lbs||105800 lbs|
|Total Engine and Tender Weight||230800 lbs||276500 lbs||237040 lbs|
|Tender Water Capacity||7900 gals||7300 gals||7900 gals||5600 gals|
|Tender Fuel Capacity (oil/coal)||10 tons||10 tons||10 tons||10 tons|
|Minimum weight of rail (calculated)||50 lb/yard||63 lb/yard||58 lb/yard||58 lb/yard|
|Geometry Relating to Tractive Effort|
|Boiler Pressure||180 psi||180 psi||180 psi||180 psi|
|Cylinders (dia x stroke)||19" x 26"||19" x 26"||19" x 26"||19" x 26"|
|Tractive Effort||22795 lbs||22795 lbs||23162 lbs||23162 lbs|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||3.95||5.00||4.52||4.49|
|Firebox Area||164.50 sq. ft||138 sq. ft||152 sq. ft||159 sq. ft|
|Grate Area||28.20 sq. ft||28 sq. ft||31 sq. ft||31.70 sq. ft|
|Evaporative Heating Surface||2041 sq. ft||2009 sq. ft||1988 sq. ft||2223 sq. ft|
|Combined Heating Surface||2041 sq. ft||2009 sq. ft||1988 sq. ft||2223 sq. ft|
|Evaporative Heating Surface/Cylinder Volume||239.21||235.46||233.00||260.55|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||5076||5040||5580||5706|
|Same as above plus superheater percentage||5076||5040||5580||5706|
|Same as above but substitute firebox area for grate area||29610||24840||27360||28620|