Class | Qty. | Road Numbers | Year Built | Notes |
---|---|---|---|---|
U | 2 | 950-951 | 1925-26 | Built from the frames of two B&O 2-10-2s (6009, 6030) with new boilers and tenders |
See also Baltimore & Ohio to 1954 Assorted Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. (Many thanks to Chris Hohl for inquiring about this class in February 2013 and causing this entry to be drafted.)
The Big Six Santa Fes that the B&O bought from Baldwin in 1914 (Locobase 1036) mostly served as road freight engines throughout their careers. Two of them--6009 and 6030--took a different route, however, when they were converted to mighty ten-wheel switcher/pusher engines at the company's shops in the mid-1920s. The modfications entailed much more than simply removing each truck. Indeed, the only dimensions that remained the same were the cylinder volume, driver diameter, and wheelbase. A new boiler shorter by 25% and pressed to a higher degree provided the steam from water heated in a smaller firebox. Axle loading increased, a useful change in heavy switcher. As North American 0-10-0s went, these were not big engines, but in anybody's book, they were massive switchers.
Principal Dimensions by Steve Llanso of Sweat House Media | |
---|---|
Class | U |
Locobase ID | 14986 |
Railroad | Baltimore & Ohio (B&O) |
Country | USA |
Whyte | 0-10-0 |
Number in Class | 2 |
Road Numbers | 950-951 |
Gauge | Std |
Number Built | |
Builder | B&O |
Year | 1926 |
Valve Gear | Walschaert |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 21 / 6.40 |
Engine Wheelbase (ft / m) | 21 / 6.40 |
Ratio of driving wheelbase to overall engine wheelbase | 1 |
Overall Wheelbase (engine & tender) (ft / m) | 66 / 20.12 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 71,720 / 32,532 |
Weight on Drivers (lbs / kg) | 349,500 / 158,531 |
Engine Weight (lbs / kg) | 349,500 / 158,531 |
Tender Loaded Weight (lbs / kg) | 206,100 / 93,485 |
Total Engine and Tender Weight (lbs / kg) | 555,600 / 252,016 |
Tender Water Capacity (gals / ML) | 12,000 / 45.45 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 15 / 14 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 117 / 58.50 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 58 / 1473 |
Boiler Pressure (psi / kPa) | 225 / 15.50 |
High Pressure Cylinders (dia x stroke) (in / mm) | 30" x 32" / 762x813 |
Tractive Effort (lbs / kg) | 94,966 / 43075.90 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.68 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 210 - 2.25" / 57 |
Flues (number - dia) (in / mm) | 40 - 5.5" / 140 |
Flue/Tube length (ft / m) | 18.27 / 5.57 |
Firebox Area (sq ft / m2) | 294 / 27.31 |
Grate Area (sq ft / m2) | 70 / 6.50 |
Evaporative Heating Surface (sq ft / m2) | 3595 / 333.98 |
Superheating Surface (sq ft / m2) | 849 / 78.87 |
Combined Heating Surface (sq ft / m2) | 4444 / 412.85 |
Evaporative Heating Surface/Cylinder Volume | 137.32 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 15,750 |
Same as above plus superheater percentage | 18,743 |
Same as above but substitute firebox area for grate area | 78,719 |
Power L1 | 10,556 |
Power MT | 332.93 |