Chicago Great Western 4-6-0 "Ten-wheeler" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class 300B/E3 (Locobase 9982)

Data from "Ten-Wheel Compound for Chicago Great Western," Locomotive Engineering, Vol XIII, No 8 (August 1900), p. 352.

Brought into service as cross-compounds, these mixed-traffic Ten-wheelers may not have been satisfactory in a number of respects, or the traffic requirements didn't favor a neither-fish-nor-fowl design. .

Locobase supposes as much given that, although all were soon "simpled" with two 20" x 28" cylinders, six were sold to the Indianapolis & Evansville in 1910-1911 and the other four were purchased by the Canadian Government in 1917; see Locobase 8055 to see the Canadian quartet as simple-expansion locomotives.


Class E1 (Locobase 4162)

See http://www.geocities.com/zvwrr/chicago_great_western_steam.html for the original 1917 railroad diagrams.

Locobase 8054 shows the original set of ten engines (five simple, five compound) delivered in 1899. A later boiler revision deleted 19 tubes from the boiler, but added 24 sq ft (2.25 sq m) of arch tubes to the firebox heating surface area. All five of the original E-1s were set on 68" drivers, but the 204 was retrofitted with 63" drivers (as originally equipped) in 1911. At the same time, E-2 206 was given 68" drivers.

All ten locomotives were later sold through General Equipment Corporation to the Canaadian Transcontinental Railway in June 1917. See Locobase 8052


Class E4 (Locobase 4163)

Data from CGW 7 - 1902 and CGW 1904 Locomotive Diagrams supplied in August 2013 by Allen Stanley from his extensive Raildata collection. Works numbers were 3106-3111 in 1901.

Firebox heating surface given as delivered. The CGW later fitted them with 28.75 sq ft (2.65 sq m) of arch tubes.

Obviously, this design presented problems. All of the class later had their cylinders bushed to 19" and 172 and 174 saw further reductions in diameter to 18".

The entire class was scrapped in 1920-1921.


Class E5 (Locobase 10780)

Data from Baldwin Locomotive Works, Record of Recent Construction ((1903), No. 35, p. 182-183. Works number was 20272.

This was the one Vauclain compound Ten-wheeler that the CGW bought and it featured not only the compounding system but also the Vanderbilt corrugated boiler. (See Locobase 4104 in particular for a description of this unusual vessel.)

220 would later be rebuilt as a simple-expansion engine with 20" x 28" cylinders. In November 1916, 220 was sold to the Algoma Eastern as their class T-1, road number 40. The AE scrapped 40 in 1927.


Class E6s (Locobase 4164)

See http://www.geocities.com/zvwrr/chicago_great_western_steam.html for the original 1917 railroad diagrams. See also "Locomotives for the Great Western RR", Railway Master Mechanic, Volume 34, #4 (April 1910), pp. 84-86. Works numbers were 34051, 34073 in November 1909.

Firebox heating surface includes 24 sq ft of arch tubes. E6s 500-501 similar but had more weight on the drivers (151,200 lb).

The April 1910 article includes a full description of the design of the Emerson superheater:

"In the Emerson type, the smoke-box headers approximate the usual steam pipes in form. Each header is divided into two compartments, one for saturated, and the other for superheated steam. The large boiler tubes which accommodate the superheater elements, are placed immediately back of their corresponding headers, instead of being grouped in the upper part of the boiler barrel, as is usually the case with firetube superheaters. In the engines now under notice, the headers are straight, and stand vertically."

In the accompanying cross-section of the boiler, one can see the two columns of large flues flanked by small tubes to their outside and inside.

Further up, "The superheated steam section of the header is centrally located between the two arms of the saturated steam section, the latter being divided at the top. At the lower end, the superheated steam sections are connected by a transverse equalizing pipe.

" The superheater elements are composed of steel tubes having an internal diameter of 1 inch. These tubes are expanded into the headers and are arranged with a double loop in each large boiler tube. The loops are connected by cast steel return bends. A plug is screwed into the front of the header opposite each tube opening. Application has been made for a patent covering this design of superheater."

The pair was scrapped in April 1930 and in 1931.


Class E7 (Locobase 4156)

Data from http://www.geocities.com/zvwrr/chicago_great_western_steam.html for the original 1917 railroad diagrams. See also DeGolyer, Volume 35, pp. 179+ (Thanks to Chris Hohl for his 27 July 2015 email flagging tender data from the Baldwin specifications books.) Works numbers were 35286-35288, 35327-35329 in September 1910.

Firebox heating surface includes 27 sq ft of arch tubes; the original superheater was a low-superheat Vauclain smokebox design. Piston valves measured 13"(330 mm) in diameter. The first two were heavier than the last four for some reason; they put 162,000 lb on the drivers and 216,200 lb on all engine axles.

All were superheated with Schmidt firetube superheaters in 1913-1914 and in 1917-1920, the railroad fitted bushings in the cylinders to improve the heating surface-to-cylinder volume ratio. See Locobase 4165.


Class E7s (Locobase 4165)

Data from CGW 1917 and CGW 1 - 1943 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

Baldwin's saturated-boiler original of this class is shown in Locobase 4156.

In the 1913-1914 update, the firebox heating surface included 22 sq ft of arch tubes and featured 193 2" tubes. The 1925 modification saw the tube count climb to 202, arch tube area dropped to 22 sq ft, and total evaporative heating surface area grew to 2,457 sq ft. Weight on the drivers climbed to 162,000 lb and total engine weight rose to 216,200 lb. The 1917 diagram shows a grate area of 46.7 sq ft, but the firebox is the same as the original and that was measured at 53.6 sq ft.

All of the class was scrapped in March-June 1950.


Class L/200A, 200B (Locobase 8054)

Data from CGW 7 - 1902 Locomotive diagram book supplied in August 2016 by Allen Stanley from his extensive Raildata collection. See also DeGolyer, Volume 22, p. 66. Works numbers were 16576-16580.(simple-expansion) in , 16636-16640.(Vauclain compound) in .

Hearty mixed-traffic Ten-wheelers that consisted of two quintets. The first five were fitted with simple-expansion 20" x 28" (508 x 711 mm) cylinders. The second five, whose specifications are shown in the table, duplicated the 200As except for the installation of a four cylinder Vauclain compound system. Each 13" (330 mm) piston valve served a set of one HP and one LP in a single casting. Weights shown are for the compounds; the simples put 117,800 lb (53,433 kg) on the drivers and had engine weights of 157,550 lb (71,464 kg).

(NB: The Baldwin spec showed 281 tubes and 173 sq ft (17.65 sq m) of firebox heating surface area, but Locobase goes with only slightly later railroad diagram as definitive of the delivered engines.)

This mirror-imaging was common as railroads tried out compounding against an identical main-line design. Like most such engines, the five compounds were rebuilt by the CGW as simple-expansion engines in 1908-1909. See Locobase 4162 for the final version of the E

Specifications by Steve Llanso of Sweat House Media
Class300B/E3E1E4E5E6s
Locobase ID9982 4162 4163 10780 4164
RailroadChicago Great Western (CGW)Chicago Great Western (CGW)Chicago Great Western (CGW)Chicago Great Western (CGW)Chicago Great Western (CGW)
CountryUSAUSAUSAUSAUSA
Whyte4-6-04-6-04-6-04-6-04-6-0
Number in Class106614
Road Numbers230-239/210-219200-203, 206170-175220500-503
GaugeStdStdStdStdStd
Number Built10614
BuilderRhode IslandCGWRichmondBurnham, Williams & CoBaldwin
Year19001912190119021909
Valve GearStephensonStephensonStephensonStephensonWalschaert
Locomotive Length and Weight
Driver Wheelbase15'15'14'15'15.25'
Engine Wheelbase26.92'27.17'24.25'27.50'27.09'
Ratio of driving wheelbase to overall engine wheebase 0.56 0.55 0.58 0.55 0.56
Overall Wheelbase (engine & tender)55.37'52.17'53.46'57.28'
Axle Loading (Maximum Weight per Axle)41600 lbs
Weight on Drivers159200 lbs122800 lbs103175 lbs132710 lbs144950 lbs
Engine Weight179820 lbs167550 lbs133475 lbs182110 lbs198000 lbs
Tender Light Weight107000 lbs110080 lbs118080 lbs119900 lbs149000 lbs
Total Engine and Tender Weight286820 lbs277630 lbs251555 lbs302010 lbs347000 lbs
Tender Water Capacity6000 gals6145 gals6145 gals6000 gals8000 gals
Tender Fuel Capacity (oil/coal)8 tons5 tons9 tons tons13 tons
Minimum weight of rail (calculated)88 lb/yard68 lb/yard57 lb/yard74 lb/yard81 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter63"68"70"63"73"
Boiler Pressure200 psi200 psi180 psi200 psi180 psi
High Pressure Cylinders (dia x stroke)22" x 26"20" x 28"20" x 26"15.5" x 30"24" x 28"
Low Pressure Cylinders (dia x stroke)35" x 28" (1)26" x 30" (2)
Tractive Effort24843 lbs28000 lbs22731 lbs28698 lbs33803 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 6.41 4.39 4.54 4.62 4.29
Heating Ability
Firebox Area183.50 sq. ft214 sq. ft154.60 sq. ft135.50 sq. ft169.50 sq. ft
Grate Area32.90 sq. ft32.60 sq. ft29.10 sq. ft33 sq. ft42.60 sq. ft
Evaporative Heating Surface2796 sq. ft2463 sq. ft2002 sq. ft2361 sq. ft2408 sq. ft
Superheating Surface480 sq. ft
Combined Heating Surface2796 sq. ft2463 sq. ft2002 sq. ft2361 sq. ft2888 sq. ft
Evaporative Heating Surface/Cylinder Volume488.85241.92211.77360.36164.25
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation65806520523866007668
Same as above plus superheater percentage65806520523866008972
Same as above but substitute firebox area for grate area3670042800278282710035697
Power L1500278666164346111316
Power MT207.80423.65395.13172.49516.33

Specifications by Steve Llanso of Sweat House Media
ClassE7E7sL/200A, 200B
Locobase ID4156 4165 8054
RailroadChicago Great Western (CGW)Chicago Great Western (CGW)Chicago Great Western (CGW)
CountryUSAUSAUSA
Whyte4-6-04-6-04-6-0
Number in Class666
Road Numbers504-509504-509200-209/4541+/1413-1417
GaugeStdStdStd
Number Built66
BuilderBaldwinCGWBurnham, Williams & Co
Year191019251899
Valve GearWalschaertWalschaertStephenson
Locomotive Length and Weight
Driver Wheelbase16'16'15'
Engine Wheelbase27.83'27.83'27.17'
Ratio of driving wheelbase to overall engine wheebase 0.57 0.57 0.55
Overall Wheelbase (engine & tender)58.56'58.57'53.12'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers149000 lbs162000 lbs120250 lbs
Engine Weight206000 lbs216200 lbs163800 lbs
Tender Light Weight144000 lbs158000 lbs110000 lbs
Total Engine and Tender Weight350000 lbs374200 lbs273800 lbs
Tender Water Capacity6000 gals8000 gals6000 gals
Tender Fuel Capacity (oil/coal)11 tons14 tons11 tons
Minimum weight of rail (calculated)83 lb/yard90 lb/yard67 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter73"73"63"
Boiler Pressure180 psi180 psi200 psi
High Pressure Cylinders (dia x stroke)26" x 28"24" x 28"15.5" x 28"
Low Pressure Cylinders (dia x stroke)26" x 28" (2)
Tractive Effort39671 lbs33803 lbs26785 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.76 4.79 4.49
Heating Ability
Firebox Area183 sq. ft189 sq. ft190 sq. ft
Grate Area53.50 sq. ft53.60 sq. ft32.70 sq. ft
Evaporative Heating Surface3150 sq. ft2457 sq. ft2600 sq. ft
Superheating Surface480 sq. ft
Combined Heating Surface3150 sq. ft2937 sq. ft2600 sq. ft
Evaporative Heating Surface/Cylinder Volume183.08167.59425.18
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation963096486540
Same as above plus superheater percentage9630111926540
Same as above but substitute firebox area for grate area329403946338000
Power L15174115354333
Power MT229.67470.93238.32

Reference


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