Data from FCM 1920 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange and DeGolyer, Volume 11, pp. 54. Works numbers 6555-6559 in January 1883. (Campeche had the lowest boiler number.)
Ordered at the same time as the four engines described in Locobase 6956, this quartet had smaller drivers. The specification shows that the original plan was to fit 48" drivers, but an 18 June 1882 note shows the figure crossed out and the 51" written in.
Delivered with 19" cylinder bores, these engines later had their cylinders bushed to 18" diameter, perhaps because the cylinder volume overmatched the boiler's ability to create steam. All were delivered with names Nautla, Campeche, Coatspec, and Zongolica.
Data from FCM 1920 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also DeGolyer, Volume 11, pp. 54 and 212. Works numbers 6199 in May 1882; 6337, 6342 in August; 6364 in September; and 6811-6812 in June 1883.
Relatively old Ten-wheeler with a long, straight boiler over unevenly spaced driving axles, firebox between the last two axles (which were 8 1/2 feet apart), steam dome over the front two driving axles (which were 5 feet apart), and straight stack. Note that 54 & 57 (at least) had tenders with 2,327 US-gallon oil capacity.
Delivered with 19" cylinder bores, these engines later had their cylinders bushed to 18" diameter, perhaps because the cylinder volume overmatched the boiler's ability to create steam. All were delivered with names Tepeyac, Zempoala, Anahuac, Mexico, Meztitlan, and Cuatalapanga and all were renumbered several times.
Four more with smaller drivers were delivered at the same time; see Locobase 15929.
Data from FCM 1920 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.
Although the diagram is the only illustration available to Locobase, it seems to depict a Belpaire firebox. Although only three were left in 1920, the builder's numbers order suggests that at least 4682-4685 were produced as a batch for the Mexicano.
Data from MexRy 1939 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.
Pittsburgh supplied the first 2 in 1900 and Dickson added 4 more in 1902.
Data from Degolyer, Volume 29, p. 85. See also MexRy 1939 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 28163-28164 in May 1906.
This pair of Ten-wheelers followed a couple of earlier Baldwins shown in Locobase 6736. Although evaporative heating surface increased, the grate area dropped appreciably. This may not have mattered as much with oil-firing as it would have with coal.
In a later year, the MR reduced the boiler's tube count by 30, which trimmed total evaporative heating surface to 2,342 sq ft.
The pair served the Mexicano for almost 50 years. 40 retired in 1960.
Data from DeGolyer, Volume 27, p. 133; and MexRy 1939 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 24791 and 24799 in November 1904
These Ten-wheelers were similar to the Alcos that had preceded them onto the MR. The boiler was a bit bigger, but the other principal measurements differed little except for the driver diameter. The pair burned soft coal when they arrived on the railway, but were converted to oil-burning some time later.
They went to the Nacional de Mexico in 1950 as that railroad's F-35 class.
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 27, p.133. Works numbers were 24791, 24799 in November 1904 and 28163-28164 in May 1906.
Not long after they took delivery of 6 Consolidations with Belpaire fireboxes (Locobase 13640), the Mexican took on 2 4-6-0s with essentially identical boilers and power dimensions. Only the drivers were different, although only by 4".
Principal Dimensions by Steve Llanso of Middle Run Media | |||||
---|---|---|---|---|---|
Class | F-1 | F-1-53 | F-3- 21 | F-4 | F-5 |
Locobase ID | 15929 | 6956 | 6955 | 6734 | 6735 |
Railroad | Mexican Railway | Mexican Railway | Mexican Railway | Mexican Railway | Mexican Railway |
Country | Mexico | Mexico | Mexico | Mexico | Mexico |
Whyte | 4-6-0 | 4-6-0 | 4-6-0 | 4-6-0 | 4-6-0 |
Number in Class | 4 | 6 | 4 | 6 | 2 |
Road Numbers | 50-53/55-58 | 47-49, 2, 61-62/53-58 | 21-24 | 69-70 / 31-36 | 39-40 |
Gauge | Std | Std | Std | Std | Std |
Number Built | 4 | 6 | 4 | 6 | 2 |
Builder | Burnham, Parry, Williams & Co | Burnham, Parry, Williams & Co | Neilson & Co | several | Burnham, Williams & Co |
Year | 1883 | 1882 | 1894 | 1900 | 1906 |
Valve Gear | Stephenson | Stephenson | Stephenson | Stephenson | Baker |
Locomotive Length and Weight | |||||
Driver Wheelbase (ft / m) | 13.50 / 4.11 | 13.50 / 4.11 | 12.50 / 3.81 | 12 / 3.66 | 12.50 / 3.81 |
Engine Wheelbase (ft / m) | 23.65 / 7.21 | 23.52 / 7.17 | 23.12 / 7.05 | 23 / 7.01 | 23.08 / 7.03 |
Ratio of driving wheelbase to overall engine wheelbase | 0.57 | 0.57 | 0.54 | 0.52 | 0.54 |
Overall Wheelbase (engine & tender) (ft / m) | 46.25 / 14.10 | 46.08 / 14.05 | 50.21 / 15.30 | 51.75 / 15.77 | 48.33 / 14.73 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |||||
Weight on Drivers (lbs / kg) | 71,905 / 32,616 | 71,905 / 32,616 | 106,769 / 48,430 | 109,257 / 49,558 | 115,447 / 52,366 |
Engine Weight (lbs / kg) | 91,755 / 41,619 | 91,755 / 41,619 | 128,219 / 58,159 | 137,619 / 62,423 | 146,107 / 66,273 |
Tender Loaded Weight (lbs / kg) | 69,268 / 31,419 | 69,268 / 31,419 | 99,089 / 44,946 | 87,486 / 39,683 | 87,304 / 39,600 |
Total Engine and Tender Weight (lbs / kg) | 161,023 / 73,038 | 161,023 / 73,038 | 227,308 / 103,105 | 225,105 / 102,106 | 233,411 / 105,873 |
Tender Water Capacity (gals / ML) | 2600 / 9.85 | 2600 / 9.85 | 3500 / 13.26 | 5000 / 18.94 | 5000 / 18.94 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2402 / 9092 | 2402 / 9092 | 2055 / 7778 | 2500 / 9463 | 2680 / 10,144 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 40 / 20 | 40 / 20 | 59 / 29.50 | 61 / 30.50 | 64 / 32 |
Geometry Relating to Tractive Effort | |||||
Driver Diameter (in / mm) | 51 / 1295 | 57 / 1448 | 60 / 1524 | 60 / 1524 | 54 / 1372 |
Boiler Pressure (psi / kPa) | 150 / 1030 | 150 / 1030 | 175 / 1210 | 175 / 1210 | 200 / 1380 |
High Pressure Cylinders (dia x stroke) (in / mm) | 19" x 24" / 483x610 | 19" x 24" / 483x610 | 18.5" x 26" / 470x660 | 20" x 26" / 508x660 | 20" x 26" / 508x660 |
Tractive Effort (lbs / kg) | 21,660 / 9824.82 | 19,380 / 8790.63 | 22,061 / 10006.71 | 25,783 / 11694.99 | 32,741 / 14851.09 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.32 | 3.71 | 4.84 | 4.24 | 3.53 |
Heating Ability | |||||
Tubes (number - dia) (in / mm) | 154 - 2.25" / 57 | 154 - 2.25" / 57 | 232 - 1.75" / 44 | 243 - 2" / 51 | 330 - 2" / 51 |
Flues (number - dia) (in / mm) | |||||
Flue/Tube length (ft / m) | 12.23 / 3.73 | 12.25 / 3.73 | 11.49 / 3.50 | 13 / 3.96 | 13.37 / 4.08 |
Firebox Area (sq ft / m2) | 125.60 / 11.67 | 125.60 / 11.67 | 123 / 11.43 | 164 / 15.24 | 163.20 / 15.16 |
Grate Area (sq ft / m2) | 17.76 / 1.65 | 17.76 / 1.65 | 24 / 2.23 | 32.50 / 3.02 | 33.20 / 3.09 |
Evaporative Heating Surface (sq ft / m2) | 1215 / 112.92 | 1215 / 112.92 | 1328 / 123.42 | 1817 / 168.87 | 2460 / 228.62 |
Superheating Surface (sq ft / m2) | |||||
Combined Heating Surface (sq ft / m2) | 1215 / 112.92 | 1215 / 112.92 | 1328 / 123.42 | 1817 / 168.87 | 2460 / 228.62 |
Evaporative Heating Surface/Cylinder Volume | 154.19 | 154.19 | 164.15 | 192.28 | 260.32 |
Computations Relating to Power Output (More Information) | |||||
Robert LeMassena's Power Computation | 2664 | 2664 | 4200 | 5688 | 6640 |
Same as above plus superheater percentage | 2664 | 2664 | 4200 | 5688 | 6640 |
Same as above but substitute firebox area for grate area | 18,840 | 18,840 | 21,525 | 28,700 | 32,640 |
Power L1 | 2982 | 3333 | 4203 | 4883 | 6240 |
Power MT | 274.29 | 306.57 | 260.36 | 295.59 | 357.48 |
Principal Dimensions by Steve Llanso of Middle Run Media | ||
---|---|---|
Class | F-5 - 37 | F-5 / F-35 |
Locobase ID | 6736 | 13640 |
Railroad | Mexican Railway | Mexican Railway |
Country | Mexico | Mexico |
Whyte | 4-6-0 | 4-6-0 |
Number in Class | 2 | 4 |
Road Numbers | 37-38 | 37-40 |
Gauge | Std | Std |
Number Built | 2 | 4 |
Builder | Burnham, Williams & Co | Burnham, Williams & Co |
Year | 1904 | 1904 |
Valve Gear | Stephenson | Stephenson |
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | 12.50 / 3.81 | 12.50 / 3.81 |
Engine Wheelbase (ft / m) | 23.08 / 7.03 | 23.08 / 7.03 |
Ratio of driving wheelbase to overall engine wheelbase | 0.54 | 0.54 |
Overall Wheelbase (engine & tender) (ft / m) | 48.33 / 14.73 | 48.12 / 14.67 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
Weight on Drivers (lbs / kg) | 115,352 / 52,323 | 116,500 / 52,844 |
Engine Weight (lbs / kg) | 146,008 / 66,228 | 147,500 / 66,905 |
Tender Loaded Weight (lbs / kg) | 87,302 / 39,600 | 80,000 / 36,287 |
Total Engine and Tender Weight (lbs / kg) | 233,310 / 105,828 | 227,500 / 103,192 |
Tender Water Capacity (gals / ML) | 5000 / 18.94 | 4000 / 15.15 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2680 / 10,144 | |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 64 / 32 | 65 / 32.50 |
Geometry Relating to Tractive Effort | ||
Driver Diameter (in / mm) | 54 / 1372 | 54 / 1372 |
Boiler Pressure (psi / kPa) | 180 / 1240 | 180 / 1240 |
High Pressure Cylinders (dia x stroke) (in / mm) | 20" x 26" / 508x660 | 20" x 26" / 508x660 |
Tractive Effort (lbs / kg) | 29,467 / 13366.02 | 29,467 / 13366.02 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.91 | 3.95 |
Heating Ability | ||
Tubes (number - dia) (in / mm) | 235 - 2.25" / 57 | 237 - 2.25" / 57 |
Flues (number - dia) (in / mm) | ||
Flue/Tube length (ft / m) | 13.42 / 4.09 | 13.37 / 4.08 |
Firebox Area (sq ft / m2) | 167 / 15.51 | 162.70 / 15.12 |
Grate Area (sq ft / m2) | 33.20 / 3.09 | 33.20 / 3.08 |
Evaporative Heating Surface (sq ft / m2) | 2023 / 188.01 | 2018 / 187.48 |
Superheating Surface (sq ft / m2) | ||
Combined Heating Surface (sq ft / m2) | 2023 / 188.01 | 2018 / 187.48 |
Evaporative Heating Surface/Cylinder Volume | 214.07 | 213.54 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 5976 | 5976 |
Same as above plus superheater percentage | 5976 | 5976 |
Same as above but substitute firebox area for grate area | 30,060 | 29,286 |
Power L1 | 4899 | 4854 |
Power MT | 280.89 | 275.57 |