Chicago & North Western / Chicago, St Paul, Minneapolis & Omaha / Fremont, Elkhorn & Missouri Valley 4-6-0 "Ten-wheeler" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class 211 (Locobase 11130)

Data from Schenectady Locomotive Works, Illustrated Catalogue of Simple and Compound Locomotives (Philadelphia: J B Lippincott, 1897), pp. 100-101.


Class Columbus / S-7 (Locobase 9135)

Data from M Grille, Les Chemins de Fer de L'Exposition de Chicago (Paris: E Bernard et Cie, 1894), pp. 24-27 and Schenectady Locomotive Works, Illustrated Catalogue of Simple and Compound Locomotives (Philadelphia: J B Lippincott, 1897), pp. 66-67.

Locobase is puzzled by this Exposition display. It's a Ten-wheeler like a lot of North Western engines of the time, but it doesn't quite fit the mold. The firebox remains a narrow, deep furnace, but the boiler is substantially larger, so much so that the grate to heating surface ratio is way out. Yet all of the component dimensions check out (tube count, length and width of the grate). The taller drivers indicate a more purely passenger locomotive as well.

White says this locomotive was retired in 1926.


Class D-12 (Locobase 7559)

Data from the C&NW 1 - 1905 Locomotive Diagrams books supplied in May 2005 by Allen Stanley from his extensive Raildata collection is the source for specifications. See also DeGolyer, Volume 14, p. 170. Works numbers were 9491, 9493, 9495-9502, 9509-9510 in September 1888.

These freight Ten-wheelers had small grates for the period, but deep fireboxes that yielded a sizable direct heating surface. Cylinder volume was squarely in the middle of the range as were the weights, but the combination of boiler and firebox theoretically yielded a lot of steam for the cylinders. As originally specified, the boiler had 234 tubes and rolled on 57 1/4" (1,454 mm) drivers.

As was C&NW practice, these locomotives' road numbers filled in blanks in the numbering sequence. According to the spec, the numbers were 13, 23, 32, 41, 49, 71, 112, 135, 145, 149-150, 186, 194, 394, 527, 551, 650, 653.

Almost all served the C & NW for 30 years or more, although two were scrapped in 1917. The others went to the ferro-knackers over a 4-year period (October 1919 to January 1923).


Class D-13 (Locobase 12039)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 18, p.53. Works number was 12930 in September 1892

Locobases 12039-12040 show 1-locomotive trial horses for the Vauclain compound arrangement. This was the relatively orthodox Ten-wheeler, very similar in layout to the Norfolk & Western engines, but a little smaller. Its piston valves had 10 1/2" diameters.

The 820 was rebuilt in 1901 as a 19" x 24" simple-expansion locomotive and served until it was retired and scrapped in August 1926.


Class E-4 (Locobase 9324)

Data from CStPM&O 4 - 1900 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 1996-2000 in August 1885.

Adding to the six Baldwin 18" passenger engines (Locobase 9322), this Ten-wheeler sextet came from a rival builder three years later. They had the same power dimensions, but a slightly larger grate and substantially increased heating surface areas. Thus, they may be thought to have had more steam stamina under similar conditions.


Class E-9 (Locobase 9329)

Data from CStPM&O 4 - 1900 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 3367-3372 in April 1891.

The Omaha Road retained its 140-psi steam pressure settings for years after other railroads had moved to 150-160 psi. This sextet of Ten-wheelers from the early '90s showed two big changes: a jump in psi to 170 and a grate that was half again as larger as the earlier surfaces. This latter enlargement was achieved by raising the floor of the firebox above the driving axles, thereby gaining 5" in width and in lengthening it as well.

Production of the class comprised 3 in April 1891, 2 in May (177 & 179), and one in June (178). At the same time, the railroad was taking delivery of the F-1 with 19" cylinders. See Locobase 9330.


Class F-1 (Locobase 9330)

Data from CStPM&O 4 - 1900 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 3409-3412 in March 1891, 3531 in July.

As this upper-New York State builder was supplying mixed-traffic Ten-wheelers with 18" cylinders to the Omaha Road in 1891 (Locobase 9329), it was simultaneously producing more powerful 19" freighters. The grate was still bigger, the tubes fewer in number but a bit longer, and the adhesion weight increasing.

These were followed a year later by a larger class of similar proportions; see Locobase 9331.


Class F-2 (Locobase 9331)

Data from CStPM&O 4 - 1900 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 3729-3734 in April 1892, 3787-3790 in June, 3967-3971 in January 1893

Locobase 9330 shows the 19" freighters that arrived on the Omaha Road in mid-1891. Within the year Schenectady was supplying similar locomotives with slightly taller drivers and a few more tubes.


Class F-3 (Locobase 9332)

Data from DeGolyer, Volume 18, p. 215; and CStPM&O 4 - 1900 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works number was 13630 in March 1893.

While the Omaha Road was taking delivery of several dozen Schenectady Ten-wheelers in the early 1890s, it also purchased this one small-grate engine from Baldwin. Not long after it was delivered, the railroad removed four tubes, which reduced the tube heating surface area to 1,635 sq ft. The 1900 diagram also showed a slightly larger firebox heating surface area of 159.2 sq ft.

226 enjoyed a long life, only being retired in March 1939.


Class F-4 (Locobase 9333)

Data from CStPM&O 4 - 1900 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

It's not clear why this locomotive would have to be rebuilt from an F-1 (Locobase 9330) and especially puzzling is why the firebox was so much shorter and narrower afterward. Doubtless there was more to this story.


Class F-5 (Locobase 9334)

Data from CStPM&O 4 - 1900 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 3794-3797 in July 1892.

As this New York builder was turning out a few dozen freighters for the Omaha Road, it was also supplying this quartet of passenger locomotives with bigger boilers. They may have been the first CStPM & O locomotives with more than 50 short tons of adhesive weight.


Class F-7 (Locobase 9335)

Data from CStPM&O 4 - 1900 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 273-274 in November 1897.

This was one of the biggest Ten-wheelers of the mid-1890s in terms of its boiler, firebox heating surface, and adhesion weight. Its grate, however, was undersized compared to the rest of the design.


Class F-9 (Locobase 9337)

Data from CStPM&O 4 - 1900 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 4754-4757 in July, 4758-4763 in August 1898.

Schenectady was delivering 73" drivered Eight-wheelers to the Omaha Road (Locobase 9336) at the same time it supplied this ten-spot of Ten-wheeler freighters. It's pretty clear that this was the same design as the F-8 with a stretch of two feet in the tubes to allow a third driving axle. The drivers were 14" smaller in diameter, but all of the other specifications are either identical or simply scaled up in reflection of the longer boiler.


Class G-1 (Locobase 9338)

Data from CStPM&O 4 - 1900 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 5093-5096 in July 1899, 5098-5102 in August, and 5401-5403 in January 1900.

A year after the large 19" cylinder Ten-wheelers described in Locobase 9337, Schenectady supplied this larger batch of 20" locomotives with taller drivers and more heating surface. .

This was a middle-of-the-pack locomotive in terms of its boiler, grate, firebox, and adhesion weight. In other words, like many other 4-6-0s that paid the bills for the companies that owned them.


Class G-2 (Locobase 9339)

Data from CStPM&O 4 - 1900 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 5737-5839 in May 1901.

This trio immediately followed the G-1s (Locobase 9338) as the passenger equivalent. They were delivered in June 1901. For some reason, Drury (1993) does not include them in his listing of C StP M & O locomotives.


Class I-1 (Locobase 9343)

Data from CStPM&O 4 - 1900 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 5834-5836 in July 1901, 25417-25420 in July 1902, 25421-25422 in August, 25423-25426 in September, 27551-27565 in August 1903, 30468-30470 in July 1905, 39400-39409 in July 1906, 42622-42631 in August 1907.

This large class of Ten-wheelers was very similar to the R-1s then being delivered to the Chicago & North Western. Both had the same small firebox and large grate, boilers with only a five-tube difference in the tube count. The I-1s were lighter and most had Stephenson valve motion when delivered.

101-106, 222-225, 356-363 (works numbers 45915-45919 in February 1909, 47040-47042 in July 1910), 47043-47046 in April 1910 and 48948-48953 in December) had Walschaert gear. Deliveries occurred over a long period with the last coming from Schenectady in 1910.

As with the R-1s, the I-1s were superheated; see Locobase 4357.


Class I-1 - superheated (Locobase 4857)

Data from Larry Bohn, author of the website members.lsol.net/mollyandmic/omaha.htm.

See Locobase 9343 for the original I-1. The site says that the I-1 and K-1 Ten-wheelers were "the workhorses of the way freight traffic". This data reflects a later upgrade with superheater and 12" (305 mm) piston valves. Firebox heating surface included 24.2 sq ft of arch tubes. Although many roads that superheated locomotives with Stephenson gear took the opportunity to install an outside, radial valve gear, the Omaha Road did not. Those that were delivered with Stephenson kept it, likewise those with Walschaert.

(Drury (1993) says these were identical to the Chicago & NorthWestern's R-1s, but a comparison of the data suggests otherwise.


Class K-1 (Locobase 4858)

Data from Larry Bohn, author of the website members.lsol.net/mollyandmic/c385.htm

K-1s differed from I-1s in having cylinders 2" larger in diameter, but a boiler pressure 20 psi lower. Also the boiler was slightly longer and had more tubes. The class originally came from Schenectady and Brooks in 1911-1913. Works numbers were Schenectady 50126-50131 in July 1911; Brooks 50947-50956 in April 1912; Schenectady 52621-52628 in February 1913 and 52629-52630 in March

This data reflects a later upgrade with superheater. Firebox heating surface included 24.2 sq ft (2.25 sq m) of arch tubes.


Class Q (Locobase 7561)

Data from the C&NW 1 - 1905 Locomotive Diagrams books supplied in May 2005 by Allen Stanley from his extensive Raildata collection is the source for specifications.

Schenectady delivered 15 in 1898 (works# 4844-4858) and Rhode Island added 10 in 1903 (works #27605-27614). The 25 Rogers engines delivered in 1906 had fewer tubes; see Locobase 7558.


Class Q (Rogers) (Locobase 7562)

Data from the C&NW 1 - 1927 Locomotive Diagrams books supplied in May 2005 by Allen Stanley from his extensive Raildata collection is the source for specifications.

For some reason, the 25 Qs built by Rogers (works #38543-38567) had 25 fewer boiler tubes than the earlier Schenectady-Rhode Island engines. Firebox heating surface included 11.8 sq ft of arch tubes. They were never superheated and were retired only 22-25 years later in 1928 to 1931.


Class R (Locobase 8387)

Data from "Ten-Wheeled Freight EngineùChicago & Northwestern Railway", Locomotive Engineering, Vol X, No 1 (January 1898), p 23 and 1927 C & NW locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

This large class of Ten-wheelers is shown as delivered in the late 1890s, part of the large North Western holding of 4-6-0s that satisfied the bread-and-butter local-service requirements for decades.

The 1927 Diagram book shows an upgraded locomotive with fewer tubes (283) but more firebox area (because of arch tubes) and cylinders an inch larger in diameter. Some were later upgraded in the 1920s; see Locobase 12339.


Class R (Locobase 12338)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 22, p. 80 and C&NW 1 1905 and 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers werre 16583-16587 in March 1899; 17251-17255 in December.

This batch was a small part of a long series of orders fulfilled primarily by Schenectady (and Alco-Schenectady). The first 81 are described in Locobase 8387; they had 19"-diameter cylinders.

The class was numbered out of sequence: 298,

302, 306, 323, 325, 292, 294, 308, 310, 327. Those that were supplied by Schenectady were essentially identical, but by 1927 had 9 fewer tubes and commensurately smaller heating surface.

None was ever superheated, but some were rebuilt with thermic syphons (see Locobase 12339).


Class R (Locobase 12339)

Data from C&NW 1 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers werre 16583-16587 in March 1899; 17251-17255 in December.

Locobase 12338 describes the original design and its original boiler. In the 1920s, the NorthWestern rebuilt at twenty-seven of this large class with a new firebox and a smaller boiler. The firebox gained 13.3 sq ft (1.24 sq m) of arch tube area and one thermic syphon of 30 sq ft (2.79 sq m). So the ratio of direct heating surface changed considerably.


Class R-1 (Locobase 4367)

Data from table in June 1907 issue of American Engineer & Railroad Journal; see also "Ten-Wheel Freight Locomotive, Chicago & Northwestern Railway", Railway Master Mechanic, Volume 31 (August 1907), pp. 284-285.

Described by Drury (1993) calls these "the engines that typify the North Western ..."; good-looking general-service locomotives that were delivered by Alco-Schenectady and Baldwin over a seven-year period. They had piston valves (5 3/4" maximum travel) driven by inside Stephenson link motion. Later locomotives (e.g., Baldwin's later 1907 engines with road numbers 1323-1352) had Walschaert's outside radial valve motion.

The 1907 Baldwin specs called for AM Castle & Company's Cour-Castle corrugated firebox side sheets and the O'Connor patented fire door flanging. The Railway Age, Volume XLIV, No. 17 (25 October 1907), pp. 596-597 published a description and encomium (possibly drafted by the manufacturer?) claiming that intervals between firebox maintenance events had increased by 9-18 months. Each corrugation in the side plate, which were supplied by Lukens Iron & Steel, was separately formed with 500 tons of pressure. Staybolt heads fitted in the depressions were less exposed to direct heat and thus lasted longer.

See Locobase 9343 for the same design of locomotives delivered to subsidiary Chicago, St Paul, Minneapolis & Omaha in the same period.

They were later superheated; Locobase 8388 shows the result.


Class R-1 - superheated (Locobase 8388)

Data from C & NW 1 - 1927 locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

This was the superheated upgrade of the R-1 (Locobase 4367), which took several forms. As shown in the data, a new boiler could mean not just a revision to the tube/flue layout but to the firebox as well. Joining 12.7 sq ft of arch tubes was 48.5 sq ft of thermic syphons to contribute to the firebox heating surface. So not only did the boiler benefit from drier steam, but more of the heating surface was direct.

Already valued by the North Western as a handy general-service locomotive, the superheated R-1s undoubtedly proved even more useful.


Class S-1 (Locobase 7563)

Data from the C&NW 1 - 1905 Locomotive Diagrams books supplied in May 2005 by Allen Stanley from his extensive Raildata collection is the source for specifications.


Class S-2 (Locobase 7564)

Data from the C&NW 1 - 1905 Locomotive Diagrams books supplied in May 2005 by Allen Stanley from his extensive Raildata collection is the source for specifications.

The S-2s and S-4s were virtually identical except for driver diameter and consequently weights. S-4s had 63" drivers; see Locobase 7565.


Class S-3 (Locobase 7565)

Data from the C&NW 1 - 1905 Locomotive Diagrams books supplied in May 2005 by Allen Stanley from his extensive Raildata collection is the source for specifications.


Class S-4 (Locobase 7566)

Data from the C&NW 1 - 1905 Locomotive Diagrams books supplied in May 2005 by Allen Stanley from his extensive Raildata collection is the source for specifications.

The S-2s and S-4s were virtually identical except for driver diameter and consequently weights. Compared to the S-3s (Locobase 7565), the S-4s had larger boilers.

Data from M Grille & MH Falconnette, Les Chemins de Fer a L'Exposition de Chicago, (Paris, France: E Bernard et Cie, 1894), p 26-27.on the 1893 Chicago Exposition shows a very different locomotive; see Locobase 9135.

The S-2 had 59" drivers; see Locobase 7564.


Class S-5 (Locobase 9151)

Data from the C&NW 3 - 1908 Locomotive Diagrams books supplied in May 2005 by Allen Stanley from his extensive Raildata collection is the source for specifications.

Locobase suspects this quintet might have originally entered service on a line later bought by the C & NW. The dimensions are quite similar to the other S-series engines of the time, though.

NB: Diagram shows only tube heating surface, not total.


Class S-6 (Locobase 11119)

Data from Schenectady Locomotive Works, Illustrated Catalogue of Simple and Compound Locomotives (Philadelphia: J B Lippincott, 1897), pp. 64-65.

Like many other North American railroad, the C & NW experimented briefly with compond locomotion. The cross-compound shown in this description was converted to a simple-expansion S-4 in November 1903.

Specifications by Steve Llanso of Sweat House Media
Class211Columbus / S-7D-12D-13E-4
Locobase ID11,130 9135 7559 12,039 9324
RailroadFremont, Elkhorn & Missouri Valley (C&NW)Chicago & North Western (C&NW)Chicago & North Western (C&NW)Chicago & North Western (C&NW)Chicago, St Paul, Minneapolis & Omaha (C&NW)
CountryUSAUSAUSAUSAUSA
Whyte4-6-04-6-04-6-04-6-04-6-0
Number in Class11815
Road Numbers21140082095-99
GaugeStdStdStdStdStd
Number Built11815
BuilderSchenectadySchenectadyBurnham, Parry, Williams & CoBurnham, Williams & CoSchenectady
Year18911893188818921885
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)14.8314.9213.5012.50 8.50
Engine Wheelbase (ft)25.1725.2523.7123.8724.08
Ratio of driving wheelbase to overall engine wheebase 0.59 0.59 0.57 0.52 0.35
Overall Wheelbase (engine & tender) (ft)46.0847.5445.9245.37
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)84,00096,00079,70096,00074,600
Engine Weight (lbs)108,650129,000103,700130,00098,000
Tender Loaded Weight (lbs)80,40080,600
Total Engine and Tender Weight (lbs)184,100178,600
Tender Water Capacity (gals)35004000360036003300
Tender Fuel Capacity (oil/coal) (gals/tons)86
Minimum weight of rail (calculated) (lb/yd)4753445341
Geometry Relating to Tractive Effort
Driver Diameter (in)6767596869
Boiler Pressure (psi)180170160180140
High Pressure Cylinders (dia x stroke) (in)18" x 24"19" x 24"18" x 24"14" x 24"18" x 24"
Low Pressure Cylinders (dia x stroke) (in)24" x 24"
Tractive Effort (lbs)17,75718,68617,92415,79413,411
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.73 5.14 4.45 6.08 5.56
Heating Ability
Firebox Area (sq ft)143.80164143.90114.50134.70
Grate Area (sq ft)1817.8817.0730.5017.20
Evaporative Heating Surface (sq ft)16051906153618391406
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)16051906153618391406
Evaporative Heating Surface/Cylinder Volume227.06242.01217.30430.07198.91
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation32403040273154902408
Same as above plus superheater percentage32403040273154902408
Same as above but substitute firebox area for grate area25,88427,88023,02420,61018,858
Power L166086571502039154736
Power MT520.29452.70416.58269.72419.88

Specifications by Steve Llanso of Sweat House Media
ClassE-9F-1F-2F-3F-4
Locobase ID9329 9330 9331 9332 9333
RailroadChicago, St Paul, Minneapolis & Omaha (C&NW)Chicago, St Paul, Minneapolis & Omaha (C&NW)Chicago, St Paul, Minneapolis & Omaha (C&NW)Chicago, St Paul, Minneapolis & Omaha (C&NW)Chicago, St Paul, Minneapolis & Omaha (C&NW)
CountryUSAUSAUSAUSAUSA
Whyte4-6-04-6-04-6-04-6-04-6-0
Number in Class651811
Road Numbers174-179205, 220-221, 247-248188-200, 202, 206, 212, 233-34226247
GaugeStdStdStdStdStd
Number Built65181
BuilderSchenectadySchenectadySchenectadyBurnham, Williams & CoCStPMO
Year18911891189218931895
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)11.5012.1712.1714.7514.75
Engine Wheelbase (ft)21.5022.5822.5825.0825.08
Ratio of driving wheelbase to overall engine wheebase 0.53 0.54 0.54 0.59 0.59
Overall Wheelbase (engine & tender) (ft)45.254647.1949.0846
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)89,30099,60099,60096,00097,400
Engine Weight (lbs)115,600122,700125,100129,000125,000
Tender Loaded Weight (lbs)80,40070,30075,90080,00071,000
Total Engine and Tender Weight (lbs)196,000193,000201,000209,000196,000
Tender Water Capacity (gals)40004000405040003300
Tender Fuel Capacity (oil/coal) (gals/tons)78888
Minimum weight of rail (calculated) (lb/yd)5055555354
Geometry Relating to Tractive Effort
Driver Diameter (in)6456595956
Boiler Pressure (psi)170170170170170
High Pressure Cylinders (dia x stroke) (in)18" x 24"19" x 24"19" x 24"19" x 24"19" x 24"
Tractive Effort (lbs)17,55722,35621,21921,21922,356
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.09 4.46 4.69 4.52 4.36
Heating Ability
Firebox Area (sq ft)134148.70147157
Grate Area (sq ft)25.7026.90271717
Evaporative Heating Surface (sq ft)15961487154618191542
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)15961487154618191542
Evaporative Heating Surface/Cylinder Volume225.79188.81196.30230.96195.79
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation43694573459028902890
Same as above plus superheater percentage43694573459028902890
Same as above but substitute firebox area for grate area22,78025,27924,99026,690
Power L15813449448425527
Power MT430.53298.42321.53380.78

Specifications by Steve Llanso of Sweat House Media
ClassF-5F-7F-9G-1G-2
Locobase ID9334 9335 9337 9338 9339
RailroadChicago, St Paul, Minneapolis & Omaha (C&NW)Chicago, St Paul, Minneapolis & Omaha (C&NW)Chicago, St Paul, Minneapolis & Omaha (C&NW)Chicago, St Paul, Minneapolis & Omaha (C&NW)Chicago, St Paul, Minneapolis & Omaha (C&NW)
CountryUSAUSAUSAUSAUSA
Whyte4-6-04-6-04-6-04-6-04-6-0
Number in Class4210133
Road Numbers263-266273-274279-288289-301305-307
GaugeStdStdStdStdStd
Number Built4210133
BuilderSchenectadySchenectadySchenectadySchenectadySchenectady
Year18921897189818991901
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)12.1714.811414.8314.83
Engine Wheelbase (ft)22.5825.8124.1925.8325.83
Ratio of driving wheelbase to overall engine wheebase 0.54 0.57 0.58 0.57 0.57
Overall Wheelbase (engine & tender) (ft)47.2151.7549.9251.5453.67
Axle Loading (Maximum Weight per Axle) (lbs)40,450
Weight on Drivers (lbs)102,000121,000110,800120,250121,350
Engine Weight (lbs)127,500156,850146,300158,000159,750
Tender Loaded Weight (lbs)75,900101,850105,300106,000115,300
Total Engine and Tender Weight (lbs)203,400258,700251,600264,000275,050
Tender Water Capacity (gals)40504500450045005000
Tender Fuel Capacity (oil/coal) (gals/tons)1110.5010.8010.8011
Minimum weight of rail (calculated) (lb/yd)5767626767
Geometry Relating to Tractive Effort
Driver Diameter (in)6763596369
Boiler Pressure (psi)170190190190200
High Pressure Cylinders (dia x stroke) (in)19" x 24"19" x 26"19" x 24"20" x 26"20" x 24"
Tractive Effort (lbs)18,68624,06123,71626,66023,652
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.46 5.03 4.67 4.51 5.13
Heating Ability
Firebox Area (sq ft)147178.10174175193.80
Grate Area (sq ft)2727.6026.5028.3030
Evaporative Heating Surface (sq ft)17542328215223252365
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)17542328215223252365
Evaporative Heating Surface/Cylinder Volume222.71272.85273.24245.93271.01
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation45905244503553776000
Same as above plus superheater percentage45905244503553776000
Same as above but substitute firebox area for grate area24,99033,83933,06033,25038,760
Power L159997526716967538787
Power MT388.99411.37427.93371.42478.91

Specifications by Steve Llanso of Sweat House Media
ClassI-1I-1 - superheatedK-1QQ (Rogers)
Locobase ID9343 4857 4858 7561 7562
RailroadChicago, St Paul, Minneapolis & Omaha (C&NW)Chicago, St Paul, Minneapolis & Omaha (C&NW)Chicago, St Paul, Minneapolis & Omaha (C&NW)Chicago & North Western (C&NW)Chicago & North Western (C&NW)
CountryUSAUSAUSAUSAUSA
Whyte4-6-04-6-04-6-04-6-04-6-0
Number in Class6667212525
Road Numbers302-304, 308-355, 371-375, 356-363, 101-105101-106, 222-225, 302-304+107-108+497-506, 556-65,1323-32
GaugeStdStdStdStdStd
Number Built662525
BuilderSchenectadyAlco-SchenectadyAlcoseveralRogers
Year19011906191118981906
Valve GearStephenson or WalschStephenson or WalschWalschaertStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)14.8314.8314.8314.3314.33
Engine Wheelbase (ft)25.8325.8325.8325.3325.33
Ratio of driving wheelbase to overall engine wheebase 0.57 0.57 0.57 0.57 0.57
Overall Wheelbase (engine & tender) (ft)53.8359.0959.0950.6950.53
Axle Loading (Maximum Weight per Axle) (lbs)43,333
Weight on Drivers (lbs)130,000138,000139,500102,800108,575
Engine Weight (lbs)167,400179,000186,000139,100147,560
Tender Loaded Weight (lbs)112,450143,300156,80091,60091,600
Total Engine and Tender Weight (lbs)279,850322,300342,800230,700239,160
Tender Water Capacity (gals)52007500750040004000
Tender Fuel Capacity (oil/coal) (gals/tons)1018151010
Minimum weight of rail (calculated) (lb/yd)7277785760
Geometry Relating to Tractive Effort
Driver Diameter (in)6363636363
Boiler Pressure (psi)200200180190190
High Pressure Cylinders (dia x stroke) (in)21" x 26"21" x 26"23" x 26"18" x 26"18" x 26"
Tractive Effort (lbs)30,94030,94033,40321,59521,595
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.20 4.46 4.18 4.76 5.03
Heating Ability
Firebox Area (sq ft)152176.20176.20145.80157.60
Grate Area (sq ft)46.27464625.2525.25
Evaporative Heating Surface (sq ft)30022012229420311846
Superheating Surface (sq ft)493440
Combined Heating Surface (sq ft)30022505273420311846
Evaporative Heating Surface/Cylinder Volume288.02193.04183.48265.23241.07
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation92549200828047984798
Same as above plus superheater percentage925411,040960547984798
Same as above but substitute firebox area for grate area30,40042,28836,79127,70229,944
Power L1758014,76810,78671906862
Power MT385.64707.78511.38462.58418.00

Specifications by Steve Llanso of Sweat House Media
ClassRRRR-1R-1 - superheated
Locobase ID8387 12,338 12,339 4367 8388
RailroadChicago & North Western (C&NW)Chicago & North Western (C&NW)Chicago & North Western (C&NW)Chicago & North Western (C&NW)Chicago & North Western (C&NW)
CountryUSAUSAUSAUSAUSA
Whyte4-6-04-6-04-6-04-6-04-6-0
Number in Class818027325299
Road Numbersvariousvarious
GaugeStdStdStdStdStd
Number Built8180325
BuilderSchenectadyvariousC&NWseveralC & NW
Year18971899192419011926
Valve GearStephensonStephensonStephensonStephensonWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft)14.8314.8314.8314.8314.83
Engine Wheelbase (ft)25.8325.8325.8325.8325.83
Ratio of driving wheelbase to overall engine wheebase 0.57 0.57 0.57 0.57 0.57
Overall Wheelbase (engine & tender) (ft)53.5551.6953.5557.7557.77
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)118,000118,350121,750135,500139,000
Engine Weight (lbs)156,700153,000156,700179,500186,000
Tender Loaded Weight (lbs)109,50097,500109,500139,500144,000
Total Engine and Tender Weight (lbs)266,200250,500266,200319,000330,000
Tender Water Capacity (gals)45004500520075007500
Tender Fuel Capacity (oil/coal) (gals/tons)810101010
Minimum weight of rail (calculated) (lb/yd)6666687577
Geometry Relating to Tractive Effort
Driver Diameter (in)6363636363
Boiler Pressure (psi)190190190200200
High Pressure Cylinders (dia x stroke) (in)19" x 26"20" x 26"20" x 26"21" x 26"21" x 26"
Tractive Effort (lbs)24,06126,66026,66030,94030,940
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.90 4.44 4.57 4.38 4.49
Heating Ability
Firebox Area (sq ft)186.41186.40229.70150.80216.70
Grate Area (sq ft)28.6528.6028.5446.2747.18
Evaporative Heating Surface (sq ft)23322332220729591963
Superheating Surface (sq ft)476
Combined Heating Surface (sq ft)23322332220729592439
Evaporative Heating Surface/Cylinder Volume273.32246.67233.45283.89188.34
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation54445434542392549436
Same as above plus superheater percentage544454345423925411,323
Same as above but substitute firebox area for grate area35,41835,41643,64330,16052,008
Power L1763268887081748114,769
Power MT427.77384.93384.66365.15702.73

Specifications by Steve Llanso of Sweat House Media
ClassS-1S-2S-3S-4S-5
Locobase ID7563 7564 7565 7566 9151
RailroadChicago & North Western (C&NW)Chicago & North Western (C&NW)Chicago & North Western (C&NW)Chicago & North Western (C&NW)Chicago & North Western (C&NW)
CountryUSAUSAUSAUSAUSA
Whyte4-6-04-6-04-6-04-6-04-6-0
Number in Class201818425
Road Numbers795-96, 816-818
GaugeStdStdStdStdStd
Number Built201818425
BuilderSchenectadySchenectadySchenectadySchenectadySchenectady
Year18881891189118911892
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)14.3312.2511.6012.2512.17
Engine Wheelbase (ft)24.2522.4221.5822.4222.50
Ratio of driving wheelbase to overall engine wheebase 0.59 0.55 0.54 0.55 0.54
Overall Wheelbase (engine & tender) (ft)47.2547.7746.8147.7746.92
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)88,600101,10094,500102,550102,550
Engine Weight (lbs)110,600120,400116,000125,800126,900
Tender Loaded Weight (lbs)97,50097,50097,50097,50082,300
Total Engine and Tender Weight (lbs)208,100217,900213,500223,300209,200
Tender Water Capacity (gals)45004500450045004500
Tender Fuel Capacity (oil/coal) (gals/tons)101010108
Minimum weight of rail (calculated) (lb/yd)4956535757
Geometry Relating to Tractive Effort
Driver Diameter (in)5959636362
Boiler Pressure (psi)160170170170175
High Pressure Cylinders (dia x stroke) (in)19" x 24"19" x 24"18" x 24"19" x 24"19" x 24"
Tractive Effort (lbs)19,97121,21917,83519,87220,787
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.44 4.76 5.30 5.16 4.93
Heating Ability
Firebox Area (sq ft)161.40146.68140.60146.68
Grate Area (sq ft)18.5027.2025.6027.2026.80
Evaporative Heating Surface (sq ft)15781712157417121617
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)15781712157417121617
Evaporative Heating Surface/Cylinder Volume200.36217.37222.68217.37205.31
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation29604624435246244690
Same as above plus superheater percentage29604624435246244690
Same as above but substitute firebox area for grate area25,82424,93623,90224,936
Power L14764519057505542
Power MT355.63339.52402.43357.43

Specifications by Steve Llanso of Sweat House Media
ClassS-6
Locobase ID11,119
RailroadChicago & North Western (C&NW)
CountryUSA
Whyte4-6-0
Number in Class1
Road Numbers819
GaugeStd
Number Built1
BuilderSchenectady
Year1892
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)12.17
Engine Wheelbase (ft)22.67
Ratio of driving wheelbase to overall engine wheebase 0.54
Overall Wheelbase (engine & tender) (ft)47
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)100,000
Engine Weight (lbs)130,000
Tender Loaded Weight (lbs)
Total Engine and Tender Weight (lbs)
Tender Water Capacity (gals)4000
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)56
Geometry Relating to Tractive Effort
Driver Diameter (in)64
Boiler Pressure (psi)180
High Pressure Cylinders (dia x stroke) (in)20" x 24" (1)
Low Pressure Cylinders (dia x stroke) (in)30" x 24" (1)
Tractive Effort (lbs)15,888
Factor of Adhesion (Weight on Drivers/Tractive Effort) 6.29
Heating Ability
Firebox Area (sq ft)130.70
Grate Area (sq ft)26.90
Evaporative Heating Surface (sq ft)1737
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)1737
Evaporative Heating Surface/Cylinder Volume398.09
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4842
Same as above plus superheater percentage4842
Same as above but substitute firebox area for grate area23,526
Power L14675
Power MT309.20

Photos

Reference


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