Nickel Plate / Montana Union / Seattle & International / Northern Pacific 2-8-0 "Consolidation" Type Locomotives

Class F (Locobase 827)

Later converted to G-class 0-8-0s.

Class F-1 (Locobase 829)

Built 1888-1891.

Three (50-52) were converted to Vauclain compounds for three years (1899-1902), then converted back to simple-expansion engines. As compounds, they had 15 x 28 HP cylinders, 25 x 28 LP cylinders.

Class F-2 (Locobase 830)

Data confirmed by locomotive diagrams from 1900 hosted on http://www.nprr.org/Steam%20Diagrams/Forms/AllItems.aspx (7 Feb 2004).

Class F-3 (Locobase 832)

Data confirmed by locomotive diagrams from 1900 hosted on http://www.nprr.org/Steam%20Diagrams/Forms/AllItems.aspx (7 Feb 2004).

NY Loco builder information from JF Webber's compilation as supplied by Allen Stanley in March 2004. The first of MU's class of Consolidations was works #455 (February 1889). Six months later the rest of the class rolled out of the Rome shops as works #498-503.

Once the Northern Pacific took over, these 2-8-0s were renumbered frequently, many 3 times over. One - works #501 - was operated by the Seattle & International as their #10, then served with the Northern Pacific, and finally on the Frisco (St Louis-San Francisco).

Class F-4 (Locobase 828)

Data confirmed by locomotive diagrams from 1900 hosted on http://www.nprr.org/Steam%20Diagrams/Forms/AllItems.aspx (7 Feb 2004). The diagram notes that #94 had 19 1/2" cylinders.

Class F-5 (Locobase 837)

Boiler pressure later increased to 165 psi.

Data confirmed by locomotive diagrams from 1900 hosted on http://www.nprr.org/Steam%20Diagrams/Forms/AllItems.aspx (7 Feb 2004) and supplemented by NP to 1944 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

Class F-7 (Locobase 831)

Data confirmed by locomotive diagrams from 1900 hosted on http://www.nprr.org/Steam%20Diagrams/Forms/AllItems.aspx (7 Feb 2004). This is an unusual design with longer tubes.

Class F-8 (Locobase 833)

Data from a 1944 Northern Pacific Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive collection. This is an ex-Pennsylvania Railroad locomotive class.

Class N (Locobase 9763)

Data from Angus Sinclair, Railway and Locomotive Engineering, July 1902, p. 301.

These were the first 20th Century Consolidations procured by the New York, Chicago & St Louis Railroad. The photo accompanying the article shows a surprisingly rangy looking fast freighter with a high-pitched boiler. Firebox heating surface area included 23.8 sq ft of arch tubes.

Although other, later 2-8-0s would later be superheated, this class apparently had too little cylinder volume and too small a grate to be worth such effort. They would instead be converted to 0-6-0 switchers and scrapped in 1934.

Class N-4 (Locobase 6713)

Data from TStL&W 1 - 1924 Locomotive Database supplied in May 2005 by Allen Stanley from his extensive collection.

Although this class originated on the NY, C & St L, its relatively light axle loading apparently made it a good fit with the Clover Leaf. Drury (1993) shows them retiring between 1933 and 1945.

Class Y (Locobase 835)

Data from a 1944 Northern Pacific Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

Delivered as compounds in 1898, rebuilt and superheated in 1917 to the dimensions shown.

Class Y-1 (Locobase 6559)

Data from a 1944 Northern Pacific Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

Delivered as tandem compounds in 1900; simpled and superheated in 1917; see Locobase 833.

Class Y-1 - superheated (Locobase 836)

Data from a 1944 Northern Pacific Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

Delivered as compounds in 1900, rebuilt 1917 to the dimensions shown. Very similar to the Y-class rebuilds with slightly longer tubes but the same superheater.

Class Y-2 (Locobase 838)

Originally delivered as 4-cylinder balanced compounds in 1901-1902. As such they were profiled in Railroad Gazette 30 August 1901. The long stroke meant that the LP volume could never be large enough to make full use of the HP exhaust. These were soon converted to 2-cylinder simple engines with much lower boiler pressure.

Class Y-3 (Locobase 839)

4-cylinder tandem compounds built for low-speed drag freight. As such they differed from the Y-2s delivered at the same time, according to RG 30 August 1901. Additional data from AERJ June 1903. Firebox heating surface included 28 sq ft of arch tubes.

These were soon converted to 2-cylinder simple locomotives.

Class Y-4 (Locobase 840)

Data from a 1944 Northern Pacific Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive collection. Somewhat smaller than the earlier Y classes, but fitted with much taller drivers.

Class Y-5 (Locobase 841)

Data from a 1944 Northern Pacific Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

Specifications
Class	F	F-1	F-2	F-3	F-4	F-5	F-7	F-8	N	N-4	Y	Y-1	Y-1 - superheated	Y-2	Y-3	Y-4	Y-5
Locobase ID	827	829	830	832	828	837	831	833	9763	6713	835	6559	836	838	839	840	841
Railroad	Northern Pacific (NP)	Northern Pacific (NP)	Northern Pacific (NP)	Montana Union (NP)	Montana Union (NP)	Seattle & International (NP)	Seattle & International (NP)	Northern Pacific (NP)	Nickel Plate	Nickel Plate	Northern Pacific (NP)	Northern Pacific (NP)	Northern Pacific (NP)	Northern Pacific (NP)	Northern Pacific (NP)	Northern Pacific (NP)	Northern Pacific (NP)
Whyte	2-8-0	2-8-0	2-8-0	2-8-0	2-8-0	2-8-0	2-8-0	2-8-0	2-8-0	2-8-0	2-8-0	2-8-0	2-8-0	2-8-0	2-8-0	2-8-0	2-8-0
Road Numbers	95-103	50-81	82-83	154 / 84-91	92-94	45-46	48-49	(4-6)	119-128	162-166	30-43	17-29	17-29	1250-1279	1200-1213	1280-1293	1214-1223
Gauge	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std	Std
Builder	Burnham, Parry, Williams & Co	Burnham, Parry, Williams & Co	Burnham, Parry, Williams & Co	New York (Rome)	Grant	Schenectady	Rhode Island	Juniata	Alco-Brooks	Alco-Brooks	Alco-Schenectady	Alco-Schenectady	Alco-Schenectady	Alco-Schenectady	Alco-Schenectady	Alco-Schenectady	Alco-Schenectady
Year	1883	1888	1888	1889	1887	1900	1888	1891	1902	1908	1898	1900	1917	1901	1901	1903	1903
Valve Gear	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Walschaert	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson	Stephenson
	Locomotive Length and Weight
Driver Wheelbase		14'	14.25'	15.58'	14.75'	14'	16.08'	13.67'	16.75'	16.75'	14.67'	15'	15'	17'	15'	17'	15'
Engine Wheelbase		22.17'	22.33'	23.17'	22.75'	21.33'	23.37'	21.17'	25'	25'	23.25'	23.58'	23.58'	26.17'	23.67'	26.17'	23.67'
Ratio of driving wheelbase to overall engine wheebase		0.63	0.64	0.67	0.65	0.66	0.69	0.65	0.67	0.67	0.63	0.64	0.64	0.65	0.63	0.65	0.63
Overall Wheelbase (engine & tender)		49.17'	49.75'	48.79'	47.25'	49.12'	46.42'		52.37'	52.46'				53.87'	52.37'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers	96000 lbs	135000 lbs	122000 lbs	113000 lbs	100000 lbs	120250 lbs	109000 lbs	85300 lbs	140000 lbs	150600 lbs	173300 lbs	170000 lbs	172500 lbs	175000 lbs	185500 lbs	172000 lbs	178500 lbs
Engine Weight	108000 lbs	150000 lbs	136000 lbs	125000 lbs	113500 lbs	135000 lbs	124000 lbs	97600 lbs	158000 lbs	169000 lbs	191000 lbs	195000 lbs	192300 lbs	198000 lbs	209500 lbs	194000 lbs	198000 lbs
Tender Light Weight	77500 lbs	77600 lbs	90000 lbs	90000 lbs		90200 lbs	71500 lbs	30270 lbs	202000 lbs	124000 lbs	112000 lbs	112000 lbs	94000 lbs	114950 lbs	114950 lbs	114950 lbs	114950 lbs
Total Engine and Tender Weight	185500 lbs	227600 lbs	226000 lbs	215000 lbs	0	225200 lbs	195500 lbs	127870 lbs	360000 lbs	293000 lbs	303000 lbs	307000 lbs	286300 lbs	312950 lbs	324450 lbs	308950 lbs	312950 lbs
Tender Water Capacity	3500 gals	3500 gals	4244 gals	2900 gals	3250 gals	4350 gals	3500 gals	3090 gals	5000 gals	5500 gals	5500 gals		4350 gals	5500 gals	5500 gals	5500 gals	5500 gals
Tender Fuel Capacity (oil/coal)	7 tons	7 tons	9 tons	6 tons	6 tons	11 tons	8 tons	10 tons	10 tons	14 tons	10 tons	tons	9 tons	10 tons	10 tons	10 tons	10 tons
Minimum weight per yard of rail on which locomotive could run	40 lb rail	56.25 lb rail	50.83 lb rail	47.08 lb rail	41.67 lb rail	50.10 lb rail	45.42 lb rail	35.54 lb rail	58.33 lb rail	62.75 lb rail	72.21 lb rail	70.83 lb rail	71.88 lb rail	72.92 lb rail	77.29 lb rail	71.67 lb rail	74.38 lb rail
	Geometry Relating to Tractive Effort
Driver Diameter	49"	50"	51"	51"	51"	51"	55"	51"	62"	63"	55"	55"	55"	63"	55"	63"	55"
Boiler Pressure	130 psi	150 psi	150 psi	150 psi	140 psi	150 psi	150 psi	140 psi	200 psi	190 psi	200 psi	200 psi	200 psi	225 psi	200 psi	200 psi	200 psi
Cylinders (dia x stroke)	20" x 24"	22" x 28"	21" x 26"	20" x 24"	20" x 24"	20" x 24"	20" x 24"	20" x 24"	19" x 28"	19" x 28"	20" x 34"	15" x 34"	20" x 34"	15" x 34" (4)	15" x 34"	22" x 30"	22" x 30"
Tractive Effort	21649 lbs	34558 lbs	28665 lbs	24000 lbs	22400 lbs	24000 lbs	22255 lbs	22400 lbs	27715 lbs	25912 lbs	42036 lbs	36745 lbs	42036 lbs	54134 lbs	34773 lbs	39181 lbs	44880 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort)	4.43	3.91	4.26	4.71	4.46	5.01	4.90	3.81	5.05	5.81	4.12	4.63	4.10	3.23	5.33	4.39	3.98
	Heating Ability
Firebox Area									160.30 sq. ft	171 sq. ft				155.64 sq. ft	201 sq. ft
Grate Area	30.70 sq. ft	35.29 sq. ft	32.70 sq. ft	26.60 sq. ft	28 sq. ft	31 sq. ft	26 sq. ft	24.90 sq. ft	45.20 sq. ft	40.90 sq. ft	35 sq. ft	35 sq. ft	35 sq. ft	52.30 sq. ft	52.30 sq. ft	52.30 sq. ft	52.30 sq. ft
Evaporative Heating Surface		2321	1986	1868	2000	1984		1284	2513	1974	2161	3075	2219	2997	3646	3418	3652
Superheating Surface										412	468		468
Combined Heating Surface	0	2321	1986	1868	2000	1984	0	1284	2513	2386	2629	3075	2687	2997	3646	3418	3652
Evaporative Heating Surface/Cylinder Volume		188.41	190.54	214.06	229.18	227.35		147.14	273.50	214.84	174.80	442.19	179.49	215.49	524.30	258.96	276.69
	Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation	3991	5293.50	4905	3990	3920	4650	3900	3486	9040	7771	7000	7000	7000	11767.50	10460	10460	10460
Same as above plus superheater percentage	3991	5293.50	4905	3990	3920	4650	3900	3486	9040	9112.85	8246.10	7000	8219.20	11767.50	10460	10460	10460
Same as above but substitute firebox area for grate area	0	0	0	0	0	0	0	0	32060	38100.18	0	0	0	35019	40200	0	0
Power L1	0	0	0	0	0	0	0	0	7454.99	14193.19	0	0	0	3680.79	4414.21	0	0
Power MT	0	0	0	0	0	0	0	0	469.58	831.09	0	0	0	185.48	209.85	0	0