Data from FW&DC 8 - 1942 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also Handbook of Texas Online, William C. Billingsley, "FORT WORTH AND DENVER RAILWAY," accessed April 05, 2019, [] . Works numbers included 27059, 25147-25153 in 1903.
Virtually identical to the Colorado & Southern's B-4Ps, but had smaller cylinder diameters and weighed slightly less. Gradually left service over a 26-year period from 1934 to 1960.
Billingsley's Handbook of Texas Online entry stresses the FW&DC's influence on Northwest Texas's growth. In addition to promoting farming and new uses of crops (such as feeding cattle with winter wheat), they supplied seeds for new crops to encourage diversity. The railway also supplied farmers with "trees and and trees [sic] seedlings to use as windbreaks." (Decades later, plowing under those windbreaks to increase production played a part in causing the infamous Dust Bowls of the 1930s.)
Data from FW&DC 8 - 1942 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers included 40747, 40738-40739 in June 1906.
These three locomotives may have served as templates for the 20" x 28" B-4Q1s that followed in the next couple of years from several builders including Richmond and Baldwin. They were among the longest-running 20" Consolidations as all three lasted until 1940.
Identical to C&S's B-4R class, but built by Brooks. Five B-4R1 engines (1907) built by Richmond had slide valves instead of piston valves and sported other changes in the smokebox and cab. Works numbers included 40242-40251 from Alco-Brooks in July 1906 and 45570-45574 from Alco-Richmond in August 1908.
At least 5 were superheated (with a slight drop in boiler pressure from 205 psi) and fitted with 1" larger drivers; the data for that variant (taken from an April 1943 FW&D locomotive diagram) are used in the specs. The piston valves in this group measured 11" in diameter.
Fort Worth & Denver City began retiring this class in 1934, although the last B-4R1 lasted until 1960.
Principal Dimensions by Steve Llanso of Middle Run Media | |||
---|---|---|---|
Class | B-4O | B-4Q | B-4R |
Locobase ID | 1336 | 16359 | 1338 |
Railroad | Fort Worth & Denver City | Fort Worth & Denver City | Fort Worth & Denver City |
Country | USA | USA | USA |
Whyte | 2-8-0 | 2-8-0 | 2-8-0 |
Number in Class | 12 | 12 | 15 |
Road Numbers | 201-211 | 250-252 | 300-314 |
Gauge | Std | Std | Std |
Number Built | 12 | 3 | 15 |
Builder | Alco-Rhode Island | Alco-Rogers | several |
Year | 1903 | 1906 | 1906 |
Valve Gear | Walschaert | Stephenson | Stephenson |
Locomotive Length and Weight | |||
Driver Wheelbase (ft / m) | 15.50 / 4.72 | 16 / 4.88 | 15.33 / 4.67 |
Engine Wheelbase (ft / m) | 24.17 / 7.37 | 24.50 / 7.47 | 23.67 / 7.21 |
Ratio of driving wheelbase to overall engine wheelbase | 0.64 | 0.65 | 0.65 |
Overall Wheelbase (engine & tender) (ft / m) | 56.58 / 17.25 | 61 / 18.59 | 57.50 / 17.53 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |||
Weight on Drivers (lbs / kg) | 142,000 / 64,410 | 157,000 / 71,214 | 180,795 / 82,007 |
Engine Weight (lbs / kg) | 158,000 / 71,668 | 175,000 / 79,379 | 200,854 / 91,106 |
Tender Loaded Weight (lbs / kg) | 133,250 / 60,441 | 144,540 / 65,562 | 145,500 / 65,998 |
Total Engine and Tender Weight (lbs / kg) | 291,250 / 132,109 | 319,540 / 144,941 | 346,354 / 157,104 |
Tender Water Capacity (gals / ML) | 6000 / 22.73 | 8000 / 30.30 | 8000 / 30.30 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 4100 / 15,519 | 3600 / 13,626 | 2600 / 9841 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 59 / 29.50 | 65 / 32.50 | 75 / 37.50 |
Geometry Relating to Tractive Effort | |||
Driver Diameter (in / mm) | 56 / 1422 | 57 / 1448 | 57 / 1448 |
Boiler Pressure (psi / kPa) | 188.50 / 1300 | 200 / 1380 | 200 / 1380 |
High Pressure Cylinders (dia x stroke) (in / mm) | 20" x 28" / 508x711 | 20" x 28" / 508x711 | 22" x 28" / 559x711 |
Tractive Effort (lbs / kg) | 32,045 / 14535.38 | 33,404 / 15151.82 | 40,418 / 18333.32 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.43 | 4.70 | 4.47 |
Heating Ability | |||
Tubes (number - dia) (in / mm) | 281 - 2" / 51 | 328 - 2" / 51 | 219 - 2" / 51 |
Flues (number - dia) (in / mm) | 34 - 5.5" / 140 | ||
Flue/Tube length (ft / m) | 14.58 / 4.44 | 14.17 / 4.32 | 13.50 / 4.11 |
Firebox Area (sq ft / m2) | 187.70 / 17.44 | 190 / 17.65 | 195 / 18.12 |
Grate Area (sq ft / m2) | 41.30 / 3.84 | 32.50 / 3.02 | 34.65 / 3.22 |
Evaporative Heating Surface (sq ft / m2) | 1999 / 185.78 | 2609 / 242.47 | 2393 / 222.40 |
Superheating Surface (sq ft / m2) | 508 / 47.21 | ||
Combined Heating Surface (sq ft / m2) | 1999 / 185.78 | 2609 / 242.47 | 2901 / 269.61 |
Evaporative Heating Surface/Cylinder Volume | 196.37 | 256.29 | 194.24 |
Computations Relating to Power Output (More Information) | |||
Robert LeMassena's Power Computation | 7785 | 6500 | 6930 |
Same as above plus superheater percentage | 7785 | 6500 | 8177 |
Same as above but substitute firebox area for grate area | 35,381 | 38,000 | 46,020 |
Power L1 | 5077 | 6643 | 12,245 |
Power MT | 315.29 | 373.13 | 597.26 |