FC Argentine Great Western 4-6-0 Locomotives in Argentina


Class Details by Steve Llanso of Sweat House Media

Class 10 (Locobase 11239)

Data from diagram supplied at the [link] site, last accessed 17 April 2010.

When the Serie 6 Ten-wheelers delivered in 1906-1907 were superheated in later decades, only 5 remained compounds; those appear in Locobase 11238.

The other 35 were given 2 19" x 26" cylinders and fell into three sub-groups depending on valve motion. The Class 10 shown here used the Gooch motion first made famous on Britain's Great Western Railway. The 600-series engines that comprised Serie 10 were, in order of their new numbering of 1000 to 1014: 632, 638 (1928); 601-603, 628 (1929); 605, 637, 615 (1930); 616 (1931); 633, 626 (1938); 611 (1937); 627 (1931); and 621 (1930).

All other specifications were the same as the other Serie 10 modifications except for slight differences in weight. See 11240 for those that were fitted with Walschaert radial valve gear (Serie 10A) and 11241 for the 10 that retained Stephenson link motion.


Class 10A (Locobase 11240)

Data from diagram supplied at the [link] site, last accessed 17 April 2010.

As noted in 11239, most of the Serie 6 Ten-wheelers, which were delivered as cross-compounds in 1906-1907, were converted to simple expansion and superheated.

The program created three sub-classes based on the valve motion adopted. Serie 10 engines had Gooch valve gear, Serie 10A - this entry - used Walschaert radial valve gear mounted outside, and Serie 10B retained the original Stephenson link motion.

Unlike the Serie 10, most of which were converted in the late 1920s and early 1930s, the 10As all were updated after World War Two. In order of their later road numbers, the Serie 6 locomotives converted were:

600 (November 1947)

604 (October 1947)

606 (September 1947)

608 (April 1947)

610 (December 1945)

613 (October 1947)

614 (April 1946)

618 (November 1948)

620 (June 1945)

621 (March 1947)

623 (November 1947)

629 (March 1946)

635 (April 1947)

636 (September 1946), and

696 (May 1946).

All other specifications were the same as the other Serie 10 modifications except for slight differences in weight. See 11240 for those that were fitted with Walschaert radial valve gear (Serie 10A) and 11241 for the 10 that retained Stephenson link motion.


Class 10B (Locobase 11241)

Data from diagram supplied at the [link] site, last accessed 17 April 2010.

As noted in 11239, most of the Serie 6 Ten-wheelers, which were delivered as cross-compounds in 1906-1907, were converted to simple expansion and superheated.

The program created three sub-classes based on the valve motion adopted. Serie 10 engines had Gooch valve gear, Serie 10A used Walschaert radial valve gear mounted outside. Serie 10B -- the subject of this entry -- retained the original Stephenson link motion.

Series 10B engines were converted last of all, receiving their superheaters in 1951-1954 In order of their later road numbers, the Serie 6 locomotives converted were:

607, 609, 612, 617, 619, 622, 624-625, 630, 634, 695, 697-699

All other specifications were the same as the other Serie 10 modifications except for slight differences in weight. See 11240 for those that were fitted with Walschaert radial valve gear (Serie 10A) and 11239 for the 10s that operated Gooch valve gear.


Class 6 (Locobase 11238)

Data from diagram supplied at the [link] site, last accessed 17 April 2010..D elivered in 1906 by Beyer, Peacock (first 20), North British Locomotive Company (620-639), and Baldwin Locomotive (695-699).

At least in its superheated version, this subset of a large class of cross-compound Ten-wheelers seems to have been identical to the Serie 3 Consolidations shown in Locobase 11231. The only differences were in the amount of adhesive weight (to be expected since one less axle was available) and the height of the drivers.

Only these 5 - 1 BP, 2 NBLC, 2 BLW -- remained cross-compounds; the others all were converted to simple expansion. See Locobase 11239.

Principal Dimensions by Steve Llanso of Middle Run Media
Class1010A10B6
Locobase ID11239 11240 11241 11238
RailroadFC Argentine Great WesternFC Argentine Great WesternFC Argentine Great WesternFC Argentine Great Western
CountryArgentinaArgentinaArgentinaArgentina
Whyte4-6-04-6-04-6-04-6-0
Number in Class1515145
Road Numbers1000-10141050-10641075-1088617, 625, 634, 695, 699
Gauge5'6"5'6"5'6"5'6"
Number Built
BuilderAGWAGWAGWAGW
Year1928192819281928
Valve GearGoochWalschaertWalschaertStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)13.58 / 4.1413.58 / 4.1413.58 / 4.1413.58 / 4.14
Engine Wheelbase (ft / m)25.29 / 7.7125.29 / 7.7125.29 / 7.7125.29 / 7.71
Ratio of driving wheelbase to overall engine wheelbase 0.54 0.54 0.54 0.54
Overall Wheelbase (engine & tender) (ft / m)48.50 / 14.7848.50 / 14.7848.50 / 14.7848.50 / 14.78
Axle Loading (Maximum Weight per Axle) (lbs / kg)35,613 / 16,15436,513 / 16,56235,613 / 16,15435,613 / 16,154
Weight on Drivers (lbs / kg)106,395 / 48,262105,842 / 48,009106,395 / 48,260106,395 / 48,260
Engine Weight (lbs / kg)145,397 / 65,951145,489 / 65,993145,397 / 65,951145,397 / 65,951
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)4200 / 15.914200 / 15.914200 / 15.914200 / 15.91
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 6.70 / 6 6.70 / 6 6.70 / 6 6.70 / 6
Minimum weight of rail (calculated) (lb/yd / kg/m)59 / 29.5059 / 29.5059 / 29.5059 / 29.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)68 / 172768 / 172768 / 172768 / 1727
Boiler Pressure (psi / kPa)203.10 / 1400203.10 / 1400203.10 / 1400203.10 / 1400
High Pressure Cylinders (dia x stroke) (in / mm)19.02" x 25.98" / 483x66019.02" x 25.98" / 483x66019.02" x 25.98" / 483x66019.02" x 25.98" / 483x660 (1)
Low Pressure Cylinders (dia x stroke) (in / mm)27.52" x 25.98" / 699x660 (1)
Tractive Effort (lbs / kg)23,861 / 10823.1823,861 / 10823.1823,861 / 10823.1816,147 / 7324.16
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.46 4.44 4.46 6.59
Heating Ability
Tubes (number - dia) (in / mm)128 - 1.89" / 48128 - 1.89" / 48128 - 1.89" / 48128 - 1.89" / 48
Flues (number - dia) (in / mm)21 - 5.236" / 13321 - 5.236" / 13321 - 5.236" / 13321 - 5.236" / 133
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)138.80 / 12.91138.91 / 12.91138.91 / 12.91138.80 / 12.90
Grate Area (sq ft / m2)24.75 / 2.3024.75 / 2.3024.75 / 2.3024.75 / 2.30
Evaporative Heating Surface (sq ft / m2)1292 / 120.101292 / 120.101292 / 120.101292 / 120.10
Superheating Surface (sq ft / m2)264 / 24.50264 / 24.50264 / 24.50264 / 24.50
Combined Heating Surface (sq ft / m2)1556 / 144.601556 / 144.601556 / 144.601556 / 144.60
Evaporative Heating Surface/Cylinder Volume151.23151.23151.23302.45
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5027502750275027
Same as above plus superheater percentage5881588158815881
Same as above but substitute firebox area for grate area32,98333,00933,00932,983
Power L111,75211,75411,75411,227
Power MT730.54734.48730.67697.91

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