Chicago, St. Paul, Minneapolis & Omaha / Fremont, Elkhorn & Missouri Vall. / Chicago & North Western / Fremont, Elkhorn & Missouri Valley / Ashland / M, LS & W / Sioux City & Pacific / Chicago, St. Paul & Minneapolis 4-4-0 "American" Type Locomotives

Class 99 (Locobase 11113)

Data from Schenectady Locomotive Works, Illustrated Catalogue of Simple and Compound Locomotives (Philadelphia: J B Lippincott, 1897), pp. 32-33.

Class A (Locobase 3151)

Data from the C&NW 1 - 1908 and 1 - 1927 Locomotive Diagrams books supplied in May 2005 by Allen Stanley from his extensive collection is the source for specifications. This shows that most were delivered in 1895 with others arriving in 1898, 1899, and 1900.

McShane (1899) data for total heating surface varies slightly from Railway Age 11 Oct 1895. The latter noted that these engines were serving the Chicago-Council Bluffs run and pulling up to 11 cars per train. Sometime after delivery the railroad reduced the boiler's tube count to the figure given in the specs and added 13.3 sq ft of arch tubes to the firebox heating surface.

Class A-2 (Locobase 6798)

Data from the C&NW 1 - 1905 and 3 -1908 Locomotive Diagrams books supplied in May 2005 by Allen Stanley from his extensive collection is the source for specifications.

The North Western's shops built this batch of Eight-wheelers. They seem to have formed part of a larger group that included A-3s with a slightly larger boiler. See Locobase 6799.

Class A-2 (Locobase 9293)

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

Omaha-road predecessor West Wisconsin actually bought this petite Eight-wheeler from a small, but well-regarded Massachusetts builder.

Class A-3 (Locobase 6799)

Data from the C&NW 1 - 1905 and 3 -1908 Locomotive Diagrams books supplied in May 2005 by Allen Stanley from his extensive collection is the source for specifications.

Most of this class was produced by Schenectady with a few coming from the North Western's own shops. The Schenectady engines arrived mostly in 1883 with a few more coming in 1884. The design had the same cylinder volume and boiler pressure as the A-2s, but slightly more heating surface and taller drivers.

Class A-5 (Locobase 7553)

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

The diagram book's table of engines shows that the locomotives in this class were originally delivered in 1881-1882 as class A-1, but rebuilt in 1898-1904.

Class B-1 (Locobase 6801)

Data from the C&NW 1 - 1905 and 3 -1908 Locomotive Diagrams books supplied in May 2005 by Allen Stanley from his extensive collection is the source for specifications.

The North Western's shops built this batch of Eight-wheelers. As with many railroads, class IDs often follow no real chronological orders. These locomotives were considerably earlier than the Class B shown in the 1908 book and even earlier than the A-2s.

Class C (Locobase 454)

Data from the C&NW 1 - 1905 Locomotive Diagrams books supplied in May 2005 by Allen Stanley from his extensive collection

Four of this class were produced in a batch in April 1899 as works #5066-5069. When delivered their boilers contained 320 fire tubes that contributed to a total evaporative heating surface of 2,353 sq ft. Sometime later, the railroad removed 19 of the tubes. Also later came the 13.9 sq ft of arch tubes as additions to the firebox heating surface as welll as a reduction in driver diameter from 80".

Class C-1 (Locobase 6802)

Data from the C&NW 1 - 1905 Locomotive Diagrams books supplied in May 2005 by Allen Stanley from his extensive collection

Class C-2 (Locobase 6803)

Data from the C&NW 1 - 1905 Locomotive Diagrams books supplied in May 2005 by Allen Stanley from his extensive collection

Schenectady completed these 12 in April & May 1885. Notice the very deep and narrow firebox, which resulted in a small grate that likely didn't adequately heat all of that firebox area.

Class C-3 (Locobase 6804)

Data from the C&NW 1 - 1905 Locomotive Diagrams books supplied in May 2005 by Allen Stanley from his extensive collection

Schenectady went into volume production with this design after delivering the 12 C-2s. The principal differences were an 2" increase in the stroke and the addition of 15 boiler tubes. The very deep and narrow firebox, which seems restrictive, was not changed.

Class C-5 (Locobase 6805)

Data from the C&NW 1 - 1905 Locomotive Diagrams books supplied in May 2005 by Allen Stanley from his extensive collection

More of the same in the C-2/C-3 (Locobase 6803-6804) vein from Schenectady: Same small grate, still more boiler tubes All were produced in April-May 1888 except 887-888.

Class C-5 - 1916 rebuild (Locobase 8381)

Data from the C&NW 1 - 1927 Locomotive Diagrams books supplied in May 2005 by Allen Stanley from his extensive collection

Beginning in May 1916, the C & NW began rebuilding their large class of 1880s-era Eight-wheelers with a smaller boiler. Obviously, the modest tractive effort level was more thatn outweighed by the light axle loading and general usefulness of this mixed-traffic engine. The program continued for 7 years with the last locomotive emerging from the shops in November 1923. The profile showed the tapered stack, a rounded-thimble sandbox just behind, a taller steam dome on the second course of boiler and ahead of the first drivine axle.

Class C-6 (Locobase 6806)

Data from the C&NW 1 - 1905 Locomotive Diagrams books supplied in May 2005 by Allen Stanley from his extensive collection

When the C-6s were delivered by Schenectady in 1893, they had the same narrow fireboxes as earlier North Western Eight-wheelers (see, e.g., Locobase 6803-6805). Only a few years later, the railway itself rebuilt the locomotives by enlarging the boilers, expanding the grate area by increasing both width and length and raising it above the axles, and fitting piston valves. The first locomotive, 309, appeared in July 1899. 191 followed in December. Three -- 251, 253, 250 -- were rebuilt in April, August, and December 1900 respectively. 190 (August) and 421 (October) were the 1901 pair while 427 (April) and 99 (October) came in 1902 and 252 finished the program in February 1903.

The 1927 diagram showed a reduction of 23 tubes in the boiler and the addition of 11.8 sq ft of arch tubes to the firebox heating surface; altogether, total evaporative heating surface shrank to 1,665 sq ft.

Class C-7 (Locobase 9303)

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

Small, lightweight Eight-wheelers from a small Massachusetts builder.

Class C-9 (Locobase 9305)

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

Two years after Taunton supplied the Omaha Road with some mixed-traffic 4-4-0s (Locobase 9303), the small Massachusetts builder added this pair of freighters with slightly larger fireboxes and a little more boiler area.

Class D-1 (Locobase 9306)

Data from CStPM&O 4 - 1900 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection. Works numbers were 4899, 4905 in December 1879; 4941 in January 1880; 5294, 5296, 5303, 5305 in October 1880; and 5338 in November 1880.

Baldwin's supply of Eight-wheelers to the Omaha Road was part of series of orders from this road in that period.

Class D-10 (Locobase 9319)

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

The only difference between this pair of engines and the 123 shown in Locobase 9318 is the driver diameter, which was smaller by 5" than the lower-numbered locomotive. Otherwise, they were identical, right down to the curiously heavy tenders.

Class D-3 (Locobase 7554)

Data from the C&NW 1 - 1905 Locomotive Diagrams books supplied in May 2005 by Allen Stanley from his extensive collection. Works numbers were 5551, 5553 in March 1881; 5582, 5584-5585, 5587-5588, 5590-5602 in April; 5773-5778, 5780-5781 in August, and 5802, 5807 in September.

More than 20 years after their introduction, the Baldwins had apparently remained unaltered. Five -- 415, 421, 428, 429, 443 -- had been sold to the Winona & St Peter in the 1890s as that railway's 31, 11, 14, 21, and 52. The W & St P, a subsidiary of the Chicago & Northwestern returned the locomotives in 1900, at which point these locomotives were reunited with the rest of the class.

As the C & NW was scrapping the class in the first decade of the 20th Century, the 426 went to the Wyoming & Missouri River in July 1905 while the 425 was sold to the Hillsboro & Northeastern in July 1907 as their #3.

Class D-3 (Locobase 9307)

Data from CStPM&O 4 - 1900 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection. Works numbers were 4691-4692 in June 1879; 4714 in July; 4742-4743 in August; 4805, 4807 in October; 5340, 5363, 5366 in November 1880.

Baldwin's production of Eight-wheelers for the Omaha Road during this period (1879-1880) tended to be classed in ones and twos. This D-3 class, however, was a relatively homogenous decade of engines supplied in drips and drabs. Five -- 37 , 39, 41-43 -- had "weighted decks" to increase adhesion by 400 lb.

Class D-4 (Locobase 9308)

Data from CStPM&O 4 - 1900 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection. Works numbers were 4508-4509 in December 1878 for the first two.

Baldwin's production of Eight-wheelers for the Omaha Road during this period (1878-1880) tended to be classed in ones and twos, but all of the D series from this time had the same boiler and grate and very slight differences in firebox heating surface. Differences between classes related primarily to driver diameter.

Class D-5 (Locobase 9309)

Data from CStPM&O 4 - 1900 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection. Works #5833-5834, 5836, 5839, 5867-5868, 5873, 5875, 5876, 5881 in Ocotober 1881.

In the series of D-class locomotives supplied to the Omaha Road in 1877-1881, the D-5s stand out as unusual. Although they had virtually the same dimensions and weights as all of the others, they were missing a boiler tube. All of the others had 153 tubes, the D-5s, for some obscure reason probably having to do with aesthetics, made do with 152. Otherwise - peas in a pod.

Class D-6 (Locobase 9310)

Data from CStPM&O 4 - 1900 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection. Works numbers were 6512, 6514-6515, 6520, 6530, 6536 in December 1882; 6569, 6573, 6585-6588 in January 1883; and 6621, 6625 in February; and 6654, 6656 in March.

As the Omaha Road added to its roster of Eight-wheelers, it bought this batch of engines that were at least middle-sized for the time.

Class D-7 (Locobase 9317)

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

This locomotive had its own class in the 1900 diagram book, presumably because it retained the 60" drivers of the original class. It also had two fewer tubes than the D-8s delivered in the same year (Locobase 9316) and consequently slightly less heating surface area. But the firebox was identical. It was retired in July 1912, 30 years after its introduction.

Class D-8 (Locobase 9316)

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

The first six locomotives (works #998-1003) were named GREEN ISLE 101, ARLINGTON 102, WINTHROP 103, REDWOOD 104, FRANKLIN 105, GREENFIELD 106. The Lambert-Rumary list shows all of these as delivered with 60" drivers, but the 1900 books shows the 63" drivers in the specifications. Most of these were retired in the first decade of the 20th Century with the higher numbers being scrapped in 1913. See Locobase 9317 for the single D-7 from this builder.

Class D-9 (Locobase 9318)

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

Although similar to many of the Eight-wheelers coming into service on the Omaha Road, this one had taller drivers than most. Produced in January 1883, it accompanied two others of similar dimensions but smaller drivers.

Class E (Locobase 7555)

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

The F E & MV was a Nebraska road that was acquired by the Chicago & North Western in 1886, although the name of the subsidiary didn't change in 1901.

Class E-10 (Locobase 7556)

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

The Baldwins shown in Locobase 7555 had the passenger drivers, but these Schenectadies probably accounted for most of the freight traffic on the FE & MV.

Class E-2 (Locobase 9322)

Data from CStPM&O 4 - 1900 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection. Works numbers included 6375-6376 in September 1882 and 6413, 6420, 6500-6501 in November 1882.

A sextet of passenger engines to flesh out the motive power profile of the Omaha Road. The E class consisted of locomotives with 18" diameter cylinders.

75 was retired first in August 1914 and 70 followed in December 1915. It was 11 years before the next withdrawal, but 1926 saw disposal of the rest: 71 (May), 73 (June), 74 (August), and 72 (December).

Class E-3 (Locobase 7558)

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

The Ashland Route was part of the Milwaukee, Lake Shore and Western Railway, which operated independently in northeast Wisconsin from 1872 to 1893. The Chicago & North Western acquired the M LS & W in September 1893.

Class E-3 (Locobase 9323)

Data from CStPM&O 4 - 1900 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection. Works number was 6737.

Freight Eight-wheeler that appears to have been the only locomotive in the class.

Class E-4 (Locobase 9324)

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

Adding to the 6 Baldwin 18" passenger engines (Locobase 9322), this sextet came from a rival builder 3 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-5 (Locobase 9325)

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

As the Omaha Road settled on the 18" diameter cylinder, its locomotive purchases increased in number per class. This decade of mixed-traffic engines were produced in December 1882 and January 1883 (1 locomotive).

Class E-6 (Locobase 9326)

Data from CStPM&O 4 - 1900 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection. Works number was 6737.

This class has to be seen as one of the standard classes for the Omaha Road in the mid-1880s. The number of engines, the size of the drivers, the capacity of the boiler and grate all mark the design as a mixed-traffic locomotive that operated all over the series.

Class E-7 (Locobase 7560)

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

Class E-7 (Locobase 9327)

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

As the decade wore on, the Omaha Road's Eight-wheelers grew in size and capacity. At the same time, they were still constrained by a firebox that was deeply set between the driving axles and consequently limiting the grate area. Delivered in July 1888, these were immediately followed by a larger class of very similar locomotives; see Locobase 9328.

Class E-8 (Locobase 9328)

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

Who knows why these differences arise? When this Hudson-River builder continued its building program for the Omaha Road in July 1888, it produced a set of engines that were lacking just one tube, had drivers measuring 1" less, and had boilers pressed to 5 psi less than the E-7s that immediately preceded them. (Locobase 9327). Schenectady produced the first 7 in July 1888, 4 more in August, and the last 3 in September.

Class F-1 (Locobase 7557)

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

Class F-8 (Locobase 9336)

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

Passenger power on the Omaha Road in the late 1890s included this class of Eight-wheelers supplied in April 1896 (275-277), June 1898 (278), December 1898 (255-260), and January 1900.

They were somewhat more modestly scaled than their B-class (Locobase 6800) and C-class (Locobase 454) Eight-wheeler contemporaries on the parent Chicago & North Western, but still represented adequate mainline power.

Specifications
Class	99	A	A-2	A-2	A-3	A-5	B-1	C	C-1	C-2	C-3	C-5	C-5 - 1916 rebuild	C-6	C-7	C-9	D-1	D-10	D-3	D-3	D-4	D-5	D-6	D-7	D-8	D-9	E	E-10	E-2	E-3	E-3	E-4	E-5	E-6	E-7	E-7	E-8	F-1	F-8
Locobase ID	11113	3151	6798	9293	6799	7553	6801	454	6802	6803	6804	6805	8381	6806	9303	9305	9306	9319	7554	9307	9308	9309	9310	9317	9316	9318	7555	7556	9322	7558	9323	9324	9325	9326	7560	9327	9328	7557	9336
Railroad	Chicago & North Western	Chicago & North Western (C&NW)	Chicago & North Western (C&NW)	Chicago, St. Paul, Minneapolis & Omaha (C & NW)	Chicago & North Western (C&NW)	Chicago & North Western (C&NW)	Chicago & North Western (C&NW)	Chicago & North Western (C&NW)	Sioux City & Pacific (C&NW)	Chicago & North Western (C&NW)	Chicago & North Western (C&NW)	Chicago & North Western (C&NW)	Chicago & North Western (C&NW)	Chicago & North Western (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)	Chicago & North Western (C&NW)	Chicago, St. Paul, Minneapolis & Omaha (C & NW)	Chicago, St. Paul & Minneapolis (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)	Chicago, St. Paul, Minneapolis & Omaha (C & NW)	Fremont, Elkhorn & Missouri Vall. (C&NW)	Fremont, Elkhorn & Missouri Valley (C&NW)	Chicago, St. Paul, Minneapolis & Omaha (C & NW)	Ashland / M, LS & W (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)	Fremont, Elkhorn & Missouri Valley (C&NW)	Chicago, St. Paul, Minneapolis & Omaha (C & NW)	Chicago, St. Paul, Minneapolis & Omaha (C & NW)	Chicago & North Western (C&NW)	Chicago, St. Paul, Minneapolis & Omaha (C & NW)
Whyte	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0	4-4-0
Road Numbers	99	908	156, 497-506	229	500 series		350-400 +	215-216, 218-220	5-6 / 1004, 1065	597-608		686-704, 887-88	686-704, 887-88	various	216-217, 230	261-262	2-7, 9	124-125	410-429, 440-449	34-34	32-33	54-63	76-89	110	101-106, 109, 111-112	123		1247-1287	70-75		94	95-99	113-122	100, 126-147	1223-1227	154-159	160-173		251-260, 275-278
Gauge	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std
Builder	Schenectady	Schenectady	C & NW	Taunton	Schenectady	shops	C & NW	Schenectady	Schenectady	Schenectady	Schenectady	Schenectady	C & NW	C&NW	Taunton	Taunton	Burnham, Parry, Williams & Co	Schenectady	Burnham, Parry, Williams & Co	Burnham, Parry, Williams & Co	Burnham, Parry, Williams & Co	Burnham, Parry, Williams & Co	Burnham, Parry, Williams & Co	Manchester	Manchester	Schenectady	Burnham, Parry, Williams & Co	Schenectady	Burnham, Parry, Williams & Co	Rhode Island	Burnham, Parry, Williams & Co	Schenectady	Rhode Island	Schenectady	Schenectady	Schenectady	Schenectady	Taunton	Schenectady
Year	1897	1895	1883	1871	1883	1898	1878	1899	1899	1885	1885	1888	1916	1899	1878	1880	1879	1883	1881	1879	1878	1881	1882	1882	1882	1883	1885	1886	1882	1880	1883	1885	1882	1886	1891	1888	1888	1881	1896
Valve Gear	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson
	Locomotive Length and Weight
Driver Wheelbase	8.83'	8.50'	8.33'	7'	8.33'	8.83'	8.33'	8.50'	8.50'	8.83'	8.83'	8.83'	8.83'	8.83'	7.50'	7.50'	8'	8.50'	8.25'	8'	8'	8'	8.50'	8'	8'	8.50'	8.83'	8.83'	8.50'	7.25'	8.50'	8.50'	8.50'	8.83'	13.10'	8.83'	8.83'	8.50'	8.50'
Engine Wheelbase	23.83'	23.08'	23.10'	20.75'	23.10'	23.48'	22.98'	24.67'	23'	23.62'	23.62'	23.62'	23.62'	23.79'	21.42'	21.50'	22.50'	22.67'	22.06'	22.67'	22.50'	22.50'	22.50'	22.50'	22.50'	22.67'	23.67'	23.67'	22.50'	21.33'	22.50'	24.08'	23.25'	23.60'	24'	23.60'	23.60'	22.46'	23.08'
Ratio of driving wheelbase to overall engine wheebase	0.37	0.37	0.36	0.34	0.36	0.38	0.36	0.34	0.37	0.37	0.37	0.37	0.37	0.37	0.35	0.35	0.36	0.37	0.37	0.35	0.36	0.36	0.38	0.36	0.36	0.37	0.37	0.37	0.38	0.34	0.38	0.35	0.37	0.37	0.55	0.37	0.37	0.38	0.37
Overall Wheelbase (engine & tender)	46.46'	49.37'	43.28'	40.08'	43.28'	45.17'	44.62'	52.54'	47.17'	45.25'	45.25'	45.25'	45.79'	47.02'	40.42'	42.58'	42.17'	43.17'	43.37'	43.67'	44.17'	44.17'	44.17'	43'	43'	43.17'	44.83'	44.33'	48.35'	41.67'	48.35'	45.37'	45'	45.58'	44.33'	45.46'	45.46'	43.61'	47.75'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers	67500 lbs	83300 lbs	54300 lbs	42800 lbs	54300 lbs	66710 lbs	51400 lbs	85700 lbs	71000 lbs	56750 lbs	57650 lbs	61870 lbs	61600 lbs	76000 lbs	40500 lbs	43300 lbs	48600 lbs	48200 lbs	50500 lbs	48600 lbs	48600 lbs	48600 lbs	49400 lbs	44800 lbs	46300 lbs	51200 lbs	54400 lbs	56200 lbs	53300 lbs	43000 lbs	57800 lbs	74600 lbs	58200 lbs	57300 lbs	81700 lbs	61000 lbs	61000 lbs	50000 lbs	82700 lbs
Engine Weight	107500 lbs	131100 lbs	84400 lbs	67400 lbs	84400 lbs	108180 lbs	81000 lbs	133800 lbs	111500 lbs	88550 lbs	90000 lbs	95300 lbs	102800 lbs	118500 lbs	62200 lbs	66000 lbs	75000 lbs	74600 lbs	80400 lbs	75000 lbs	75000 lbs	75000 lbs	77000 lbs	70400 lbs	71900 lbs	77600 lbs	87000 lbs	89700 lbs	81000 lbs	68000 lbs	87500 lbs	98000 lbs	90500 lbs	90600 lbs	105900 lbs	62500 lbs	92500 lbs	80500 lbs	130700 lbs
Tender Light Weight		109500 lbs	58000 lbs	48200 lbs	58000 lbs	82000 lbs	82000 lbs	110800 lbs	79500 lbs	82000 lbs	82000 lbs	82000 lbs	82000 lbs	82000 lbs	49300 lbs	53800 lbs	56400 lbs	63700 lbs	61500 lbs	56400 lbs	56400 lbs	56400 lbs	57200 lbs	52300 lbs	52300 lbs	63500 lbs	63150 lbs	61200 lbs	63400 lbs	61500 lbs	59100 lbs	80600 lbs	72000 lbs	73500 lbs	70000 lbs	73600 lbs	73600 lbs	61500 lbs	107500 lbs
Total Engine and Tender Weight	230450 lbs	240600 lbs	142400 lbs	115600 lbs	142400 lbs	190180 lbs	163000 lbs	244600 lbs	191000 lbs	170550 lbs	172000 lbs	177300 lbs	184800 lbs	200500 lbs	111500 lbs	119800 lbs	131400 lbs	138300 lbs	141900 lbs	131400 lbs	131400 lbs	131400 lbs	134200 lbs	122700 lbs	124200 lbs	141100 lbs	150150 lbs	150900 lbs	144400 lbs	129500 lbs	146600 lbs	178600 lbs	162500 lbs	164100 lbs	175900 lbs	136100 lbs	166100 lbs	142000 lbs	238200 lbs
Tender Water Capacity	3600 gals	5200 gals	2800 gals	2000 gals	2800 gals	3800 gals	3800 gals	5200 gals	3500 gals	3800 gals	3800 gals	3800 gals	3800 gals	3800 gals	2200 gals	2283 gals	2770 gals	2750 gals	2800 gals	2400 gals	2400 gals	2400 gals	3000 gals	2805 gals	2805 gals	2800 gals	2800 gals	2750 gals	3000 gals	2000 gals	3000 gals	3300 gals	3400 gals	3000 gals	3200 gals	3000 gals	5000 gals	2800 gals	4500 gals
Tender Fuel Capacity (oil/coal)		8 tons	7 tons	5 tons	7 tons	8 tons	8 tons	10 tons	7 tons	8 tons	8 tons	8 tons	8 tons	8 tons	6 tons	6 tons	6.5 tons	6.5 tons	7 tons	6.5 tons	6.5 tons	6.5 tons	6.5 tons	6.5 tons	6.5 tons	6.5 tons	6 tons	6 tons	6 tons	5 tons	6 tons	6 tons	6.5 tons	6 tons	7 tons	8.5 tons	6.5 tons	7 tons	10.5 tons
Minimum weight per yard of rail on which locomotive could run	56 lb rail	69 lb rail	45 lb rail	36 lb rail	45 lb rail	56 lb rail	43 lb rail	71 lb rail	59 lb rail	47 lb rail	48 lb rail	52 lb rail	51 lb rail	63 lb rail	34 lb rail	36 lb rail	41 lb rail	40 lb rail	42 lb rail	41 lb rail	41 lb rail	41 lb rail	41 lb rail	37 lb rail	39 lb rail	43 lb rail	45 lb rail	47 lb rail	44 lb rail	36 lb rail	48 lb rail	62 lb rail	49 lb rail	48 lb rail	68 lb rail	51 lb rail	51 lb rail	42 lb rail	69 lb rail
	Geometry Relating to Tractive Effort
Driver Diameter	69"	75"	56"	57"	63"	69"	63"	75"	62"	63"	63"	63"	63"	69"	63"	57"	59"	63"	63"	59"	63"	59"	57"	60"	63"	69"	63"	59"	69"	63"	69"	69"	63"	63"	63"	64"	63"	63"	73"
Boiler Pressure	180 psi	190 psi	140 psi	140 psi	140 psi	180 psi	140 psi	190 psi	185 psi	150 psi	150 psi	150 psi	150 psi	180 psi	140 psi	140 psi	140 psi	140 psi	135 psi	140 psi	140 psi	140 psi	140 psi	140 psi	140 psi	140 psi	140 psi	145 psi	140 psi	135 psi	140 psi	140 psi	140 psi	140 psi	165 psi	145 psi	140 psi	140 psi	190 psi
Cylinders (dia x stroke)	18" x 24"	19" x 24"	17" x 24"	14" x 22"	17" x 24"	17" x 24"	17" x 24"	19" x 26"	18" x 24"	18" x 22"	18" x 24"	18" x 24"	18" x 24"	18" x 24"	16" x 24"	16" x 24"	17" x 24"	17" x 24"	17" x 24"	17" x 24"	17" x 24"	17" x 24"	17" x 24"	17" x 24"	17" x 24"	17" x 24"	17" x 24"	17" x 24"	18" x 24"	16" x 24"	18" x 24"	18" x 24"	18" x 24"	18" x 24"	18" x 24"	18" x 24"	18" x 24"	17" x 24"	19" x 24"
Tractive Effort	17242 lbs	18656 lbs	14739 lbs	9002 lbs	13101 lbs	15380 lbs	13101 lbs	20211 lbs	19722 lbs	14426 lbs	15737 lbs	15737 lbs	15737 lbs	17242 lbs	11605 lbs	12827 lbs	13990 lbs	13101 lbs	12633 lbs	13990 lbs	13101 lbs	13990 lbs	14480 lbs	13756 lbs	13101 lbs	11962 lbs	13101 lbs	14489 lbs	13411 lbs	11191 lbs	13411 lbs	13411 lbs	14688 lbs	14688 lbs	17311 lbs	14975 lbs	14688 lbs	13101 lbs	19168 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort)	3.91	4.47	3.68	4.75	4.14	4.34	3.92	4.24	3.60	3.93	3.66	3.93	3.91	4.41	3.49	3.38	3.47	3.68	4.00	3.47	3.71	3.47	3.41	3.26	3.53	4.28	4.15	3.88	3.97	3.84	4.31	5.56	3.96	3.90	4.72	4.07	4.15	3.82	4.31
	Heating Ability
Firebox Area	137.96 sq. ft	186.10 sq. ft	115 sq. ft	83 sq. ft	124.30 sq. ft	171.77 sq. ft	115.90 sq. ft	202.10 sq. ft		128.37 sq. ft	135 sq. ft	137.61 sq. ft	146.30 sq. ft	149.30 sq. ft	88.20 sq. ft	92 sq. ft	104.50 sq. ft	108.60 sq. ft	114.36 sq. ft	106.30 sq. ft	107.20 sq. ft	106.50 sq. ft	117 sq. ft	109.60 sq. ft	109.60 sq. ft	108.60 sq. ft	120 sq. ft	115 sq. ft	124.80 sq. ft		115.90 sq. ft	134.70 sq. ft	121.70 sq. ft	125.20 sq. ft	126 sq. ft	135 sq. ft	135 sq. ft	119.87 sq. ft	171 sq. ft
Grate Area	16.70 sq. ft	27 sq. ft	16 sq. ft	13.60 sq. ft	17.50 sq. ft	17.75 sq. ft	16.20 sq. ft	30.22 sq. ft	25.20 sq. ft	15 sq. ft	15 sq. ft	15 sq. ft	16.26 sq. ft	25 sq. ft	14.30 sq. ft	14.50 sq. ft	15.30 sq. ft	17.10 sq. ft	16.40 sq. ft	15.30 sq. ft	15.30 sq. ft	15.30 sq. ft	17 sq. ft	16 sq. ft	16 sq. ft	17.10 sq. ft	17.50 sq. ft	17.50 sq. ft	16.80 sq. ft	14.85 sq. ft	16.80 sq. ft	17.20 sq. ft	17 sq. ft	17.50 sq. ft	16.63 sq. ft	17.30 sq. ft	17.30 sq. ft	17.75 sq. ft	26.50 sq. ft
Evaporative Heating Surface	1692	1878	1090	737	1048	1632	996	2237	1700	1286	1338	1567	1238	1797	780	798	1030	1049	943	1031	1032	1026	1154	1089	1201	1049	1212	1282	1173		1254	1406	1171	1375	1549	1566	1548	1078	1854
Superheating Surface
Combined Heating Surface	1692	1878	1090	737	1048	1632	996	2237	1700	1286	1338	1567	1238	1797	780	798	1030	1049	943	1031	1032	1026	1154	1089	1201	1049	1212	1282	1173	0	1254	1406	1171	1375	1549	1566	1548	1078	1854
Evaporative Heating Surface/Cylinder Volume	239.37	238.45	172.88	188.02	166.22	258.84	157.97	262.19	240.50	198.47	189.29	221.69	175.14	254.22	139.66	142.88	163.36	166.38	149.56	163.52	163.68	162.73	183.03	172.72	190.48	166.38	192.23	203.33	165.95		177.40	198.91	165.66	194.52	219.14	221.54	219.00	170.98	235.40
	Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation	3006	5130	2240	1904	2450	3195	2268	5742	4662	2250	2250	2250	2439	4500	2002	2030	2142	2394	2214	2142	2142	2142	2380	2240	2240	2394	2450	2538	2352	2005	2352	2408	2380	2450	2744	2509	2422	2485	5035
Same as above plus superheater percentage	3006	5130	2240	1904	2450	3195	2268	5742	4662	2250	2250	2250	2439	4500	2002	2030	2142	2394	2214	2142	2142	2142	2380	2240	2240	2394	2450	2538	2352	2005	2352	2408	2380	2450	2744	2509	2422	2485	5035
Same as above but substitute firebox area for grate area	24833	35359	16100	11620	17402	30919	16226	38399	0	19256	20250	20642	21945	26874	12348	12880	14630	15204	15439	14882	15008	14910	16380	15344	15344	15204	16800	16675	17472	0	16226	18858	17038	17528	20790	19575	18900	16782	32490
Power L1	6975	8469	3451	3909	3892	8178	3673	9040	0	4686	4485	5025	4388	7449	3214	2996	3390	3712	3406	3412	3656	3403	3668	3635	4078	4065	4225	4199	4093	0	4176	4736	3701	4161	5341	4904	4623	3911	7951
Power MT	455.62	448.28	280.23	402.70	316.04	540.53	315.08	465.11	0	364.08	343.03	358.11	314.09	432.16	349.91	305.08	307.56	339.57	297.38	309.55	331.69	308.74	327.39	357.76	388.36	350.07	342.45	329.44	338.59	0	318.56	279.92	280.39	320.19	288.25	354.47	334.16	344.89	423.92