Data from Railway Age and Northwestern Reporter, Vol 24 (24 December 1897), p. 1039. See also Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 21, p. 146; see the extra page of details for various components and materials. Works numbers were 15561-15564 in November 1897.
At the same time Baldwin delivered the quartet of Ten-wheelers down in Locobase 12248 to the RGW, the company also produced this foursome of powerful Moguls. They were among the few US classes in this wheel arrangement to use the larger-diameter 2 1/4" tubes in boilers that ranked among the top in the ratio of heating surface area to cylinder volume.
Data from [] and DeGolyer, Volume 7, p. 215. Works numbers for the first two were 3806 and 3809 in December 1875.
Data from Baldwin Locomotive Works Specification for Engines, 1890, as digitized by the DeGolyer Library of Southern Methodist University Volume 16, p. 110.
Works numbers were 1890 October 11292-11293, 11296-11297, 11300, 11302, 11312 December 11446-11447, 11450, 11463, 11485, 11487, 11494-11495 1891 January 11560-11561 February 11579, 11623-11624 May 11881, 11886 The mountainous profile of the D&RG dictated the small drivers on these Moguls. The class clambered up and down the lines hauling local freight for 25 years and more. 805-807 were renumbered 827-829 in 1908. Most were scrapped in the mid-19teens, but 821 was rebuilt as a 2-6-0T tank engine in 1917 and the 578 (renumbered from 828 in 1928) was similarly made over in 1928. 814 and 823 were sold to the Denver & Intermountain Railway in July 1917 and 809 was sold in August 1917 to Elk Creek Coal Company. 819, 821-822, 826 were renumbered in 1924 to 579, 575, 577, 576 respectively.
Data from Westing 1966; [] . See also Baldwin Locomotive Works Specification for Engines, as digitized by the DeGolyer Library of Southern Methodist University, Volume 6, pp. 44-45, 156, 223; Volume 7 p. 141. Works numbers were 2476-2479 in June 1871; 2568 in September; 2727-2728 in March 1872; 2897 in August, 3021 in November, and 3165 in March 1873.
Principal Dimensions by Steve Llanso of Sweat House Media | ||||
---|---|---|---|---|
Class | 203 | 40 | 805 / G-20 | Class 35 |
Locobase ID | 12249 | 1450 | 11704 | 1449 |
Railroad | Rio Grande Western (D & RGW) | Denver & Rio Grande (D&RGW) | Denver & Rio Grande (D&RGW) | Denver & Rio Grande (D&RGW) |
Country | USA | USA | USA | USA |
Whyte | 2-6-0 | 2-6-0 | 2-6-0 | 2-6-0 |
Number in Class | 4 | 4 | 22 | 8 |
Road Numbers | 200-203 | 13-15, 19 | 805-826 | 2-3, 5, 8-12 |
Gauge | Std | 3' | Std | 3' |
Number Built | 4 | 4 | 22 | 8 |
Builder | Burnham, Williams & Co | Burnham, Parry, Williams & Co | Burnham, Parry, Williams & Co | M. Baird & Co |
Year | 1897 | 1876 | 1890 | 1871 |
Valve Gear | Stephenson | Stephenson | Stephenson | Stephenson |
Locomotive Length and Weight | ||||
Driver Wheelbase (ft / m) | 14.17 | 11.67 / 3.56 | 12.50 / 3.81 | |
Engine Wheelbase (ft / m) | 22.50 | 177 / 53.95 | 19.75 / 6.02 | |
Ratio of driving wheelbase to overall engine wheelbase | 0.63 | 0.07 | 0.63 | |
Overall Wheelbase (engine & tender) (ft / m) | 52.30 | |||
Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||||
Weight on Drivers (lbs / kg) | 85,000 / 38,555 | |||
Engine Weight (lbs / kg) | 140,600 / 63,775 | 40,000 / 18,144 | 100,000 / 45,359 | 35,000 / 15,876 |
Tender Loaded Weight (lbs / kg) | 84,000 / 38,102 | |||
Total Engine and Tender Weight (lbs / kg) | 224,600 / 101,877 | |||
Tender Water Capacity (gals / ML) | 5000 / 18.94 | 1200 / 4.55 | 3000 / 11.36 | 750 / 2.84 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | ||||
Minimum weight of rail (calculated) (lb/yd / kg/m) | 47 / 23.50 | |||
Geometry Relating to Tractive Effort | ||||
Driver Diameter (in / mm) | 61 / 1549 | 36 / 914 | 46 / 1168 | 36 / 914 |
Boiler Pressure (psi / kPa) | 200 / 13.80 | 130 / 9 | 140 / 9.70 | 130 / 9 |
High Pressure Cylinders (dia x stroke) (in / mm) | 20" x 26" / 508x660 | 12" x 16" / 305x406 | 18" x 24" / 457x610 | 11" x 16" / 279x406 |
Tractive Effort (lbs / kg) | 28,984 / 13146.94 | 7072 / 3207.81 | 20,116 / 9124.47 | 5942 / 2695.25 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.23 | |||
Heating Ability | ||||
Tubes (number - dia) (in / mm) | 264 - 2.25" / 57 | 124 - 1.5" / 38 | 241 - 2" / 51 | 100 - 1.5" / 38 |
Flues (number - dia) (in / mm) | ||||
Flue/Tube length (ft / m) | 12.42 / 3.79 | 8.11 / 2.47 | 12 / 3.66 | 7.41 / 2.26 |
Firebox Area (sq ft / m2) | 145 / 13.48 | 60 | 125.65 / 11.68 | |
Grate Area (sq ft / m2) | 28.50 / 2.65 | 8.40 / 0.78 | 20.40 / 1.90 | 7.90 / 0.73 |
Evaporative Heating Surface (sq ft / m2) | 2064 / 191.82 | 451 | 1629 / 151.39 | |
Superheating Surface (sq ft / m2) | ||||
Combined Heating Surface (sq ft / m2) | 2064 / 191.82 | 451 | 1629 / 151.39 | |
Evaporative Heating Surface/Cylinder Volume | 218.41 | 215.79 | 230.41 | |
Computations Relating to Power Output (More Information) | ||||
Robert LeMassena's Power Computation | 5700 | 1092 | 2856 | 1027 |
Same as above plus superheater percentage | 5700 | 1092 | 2856 | 1027 |
Same as above but substitute firebox area for grate area | 29,000 | 7800 | 17,591 | |
Power L1 | 6001 | 2803 | 3427 | |
Power MT | 266.66 |