Iowa Central / Minneapolis & St Louis 2-6-0 "Mogul" Locomotives in the USA

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Class Details by Steve Llanso of Sweat House Media

Class F1-27/FI-28 (Locobase 5091)

Data shown on locomotive diagram at http://www.eldora.net/lyndon/locos/classf1small..jpg, (August 2002). Works numbers were 5157-5162 in August 1899, 5163-5168 in October, 5370-

5372 in February 1900, and 26222-26227 in February 1902.

These Moguls had almost the same size boiler and cylinders as the Consolidations bought by the IC at around the same time. They followed twelve identical Minneapolis & St Louis engines delivered in 1899.

It was the classic M&SL Mogul and was supplied by Schenectady in 1899 (81-95 for the M&StL), 80-85 in 1902 for the IC & 1906 (96-102). The only difference was the boiler pressure, which was set at 190 psi in the first batch, 200 psi in the later engines.

In 1910, all of the M&StL Moguls were renumbered 300-322. The IC also renumbered its locomotives 300-305. When the two studs were combined in 1912, the M&StL's 300-305 took new numbers 323-328.

Withdrawals began in August 1935 and sixteen were gone by November 1936. Only three remained after 1941. 312 was retired in February 1946, Ex-IC 305 went to the scrapper in March 1950 , and 310 finished the class in January 1951.


Class F2-22 (Locobase 9014)

Data from M&StL 1934 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 2234-2235 in March 1893.

By the time the two Moguls shown here were profiled in the 1934 book, they had been relegated to switcher service. 61 was fitted with a mechanically operated fire door in July 1931.


Class F2-33 (Locobase 4200)

Data from Railroad Age Gazette of 2 October 1908. See also DeGolyer, Volume 32, pp. 262-264. works numbers were 32873-32874, 32881-32883, 32891 in December 1908.

This Mogul design was one of the heaviest and most powerful of its day. RAG notes that "As usual for locomotives of this type [i.e., 2-6-0s], the first pair of driving wheels is equalized with the leading truck, while the loads on the main and rear driving axles are separately equalized."

The Baldwin spec sheet for this class goes into some detail about the exact layout of the 318 tubes. Locobase finds the precision of this spec revealing in its symmetry and rectilinearity:

"Tubes to be laid out with horizontal centre [sic] lines of tubes spaced 1 5/16" apart and the up and down centre lines spaced 2 5/16" apart. cen[tre] to cen[tre] at top and 2 13/16"cen to cen at bottom for 8 spaces each side of centre line. The balance of up and down centre lines being parallel to the outer one of those laid out as described, and 2 5/16" centres."

When this class went into service, IC rails were under lease to the Minneapolis and St Louis. The M & St L bought the IC outright in 1912, at which point these engines became the F2-33 class and renumbered 329-334. Retirements began almost 25 years later (1936) with the last of the class leaving service in 1948.


Class F3-33 (Locobase 9015)

Data from M&StL 1934 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also DeGolyer, Volume 29, p. 286. Works numbers were 32944-32945 in August 1908.

These were intended for switching duties from the start and used slide valves and Stephenson gear for simplicity. Specs called for cylinders that could be bored and bushed.

A later modification added 12 sq ft of arch tubes to the firebox heating surface yielding 190 sq ft (17.65 sq m) and 1,832 sq ft (170.2 sq m) total evaporative heating surface

The pair was scrapped in July 1939 and March 1943, respectively.


Class F4-33 (Locobase 9016)

Data from M&StL 1934 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also DeGolyer, Volume 45, pp. 279+. Works numbers 35769-35770 in December 1910.

Low-drivered switching Moguls with 14" piston valves and 12 sq ft of arch tubes, these immediately followed the last two Chicago & Alton 2-6-0s described in Locobase 9089. But although they had the same boiler and firebox dimensions and tube counts as well as the same wheelbases and driver diameter, this pair had 1" (25.4 mm) reduction in cylinder diameter.

65 was scrapped in November 1941 and 66 followed in March 1943.


Class F5-32 (Locobase 14082)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 45, p. 275. Works numbers were 33460-33462 in June 1909.

These were intended for switching duties from the start and used slide valves and Stephenson gear for simplicity. Their fireboxes had 20 sq ft (1.86 sq m) of arch tubes as part of the firebox heating surface.

65 & 66 were scrapped in December 1940. 67 was the only one of the three to be fitted with Barco power reverse gear; it lasted until March 1943.

Specifications by Steve Llanso of Sweat House Media
ClassF1-27/FI-28F2-22F2-33F3-33F4-33
Locobase ID5091 9014 4200 9015 9016
RailroadIowa Central (MSL)Iowa Central (MSL)Iowa Central (MSL)Iowa Central (MSL)Minneapolis & St Louis (MSL)
CountryUSAUSAUSAUSAUSA
Whyte2-6-02-6-02-6-02-6-02-6-0
Number in Class292623
Road Numbers80-102 (MSL), 80-85 (IC)/300-32866-67/398-399/391-392/61-62200-205/329-3349-10/397-398/64, 63395-396/65-66
GaugeStdStdStdStdStd
Number Built292623
BuilderAlco-SchenectadyCookeBurnham, Williams & CoBurnham, Williams & CoBaldwin
Year18991893190819081910
Valve GearStephensonStephensonWalschaertStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)14.50 / 4.4213 / 3.9614.50 / 4.4213.33 / 4.0613.33 / 4.06
Engine Wheelbase (ft / m)22.59 / 6.8920.58 / 6.2723 / 7.0119.33 / 5.8919.75 / 6.02
Ratio of driving wheelbase to overall engine wheebase 0.64 0.63 0.63 0.69 0.67
Overall Wheelbase (engine & tender) (ft / m)59.13 / 18.0246.62 / 14.2150 / 15.2449.44 / 15.0759.25 / 18.06
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)118,000 / 53,52494,200 / 42,728128,900 / 58,468138,150 / 62,664142,000 / 64,410
Engine Weight (lbs / kg)142,200 / 64,501110,200 / 49,986155,200 / 70,398156,350 / 70,919162,000 / 73,482
Tender Loaded Weight (lbs / kg)98,000 / 44,45272,500 / 32,88599,500 / 45,13287,300 / 39,599115,600 / 52,435
Total Engine and Tender Weight (lbs / kg)240,200 / 108,953182,700 / 82,871254,700 / 115,530243,650 / 110,518277,600 / 125,917
Tender Water Capacity (gals / ML)5600 / 21.213500 / 13.265500 / 20.833500 / 13.265500 / 20.83
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)10 / 9.106 / 5.509 / 8.206 / 5.5010 / 9.10
Minimum weight of rail (calculated) (lb/yd / kg/m)66 / 3352 / 2672 / 3677 / 38.5079 / 39.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)63 / 160051 / 129557 / 144851 / 129551 / 1295
Boiler Pressure (psi / kPa)190 / 13.10160 / 11200 / 13.80175 / 12.10190 / 13.10
High Pressure Cylinders (dia x stroke) (in / mm)20" x 26" / 508x66019" x 24" / 483x61020" x 28" / 508x71120" x 26" / 508x66020" x 26" / 508x660
Tractive Effort (lbs / kg)26,660 / 12092.7923,104 / 10479.8133,404 / 15151.8230,333 / 13758.8332,933 / 14938.18
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.43 4.08 3.86 4.55 4.31
Heating Ability
Firebox Area (sq ft / m2)178 / 16.54176 / 16.36153 / 14.21178 / 16.54190 / 17.66
Grate Area (sq ft / m2)27 / 2.5123 / 2.1440 / 3.7224.70 / 2.2930.20 / 2.81
Evaporative Heating Surface (sq ft / m2)2189 / 203.441329 / 123.512179 / 202.431832 / 170.201950 / 181.23
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)2189 / 203.441329 / 123.512179 / 202.431832 / 170.201950 / 181.23
Evaporative Heating Surface/Cylinder Volume231.55168.74214.02193.78206.26
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation51303680800043235738
Same as above plus superheater percentage51303680800043235738
Same as above but substitute firebox area for grate area33,82028,16030,60031,15036,100
Power L164973815549442834954
Power MT364.15267.85281.90205.05230.74

Specifications by Steve Llanso of Sweat House Media
ClassF5-32
Locobase ID14,082
RailroadMinneapolis & St Louis (MSL)
CountryUSA
Whyte2-6-0
Number in Class3
Road Numbers300-302/399-397/69-67
GaugeStd
Number Built3
BuilderBurnham, Williams & Co
Year1909
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)11.17 / 3.40
Engine Wheelbase (ft / m)19.33 / 5.89
Ratio of driving wheelbase to overall engine wheebase 0.58
Overall Wheelbase (engine & tender) (ft / m)51.52 / 15.70
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)138,000 / 62,596
Engine Weight (lbs / kg)157,000 / 71,214
Tender Loaded Weight (lbs / kg)100,000 / 45,359
Total Engine and Tender Weight (lbs / kg)257,000 / 116,573
Tender Water Capacity (gals / ML)5000 / 18.94
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)8 / 7.30
Minimum weight of rail (calculated) (lb/yd / kg/m)77 / 38.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)51 / 1295
Boiler Pressure (psi / kPa)195 / 13.40
High Pressure Cylinders (dia x stroke) (in / mm)20.5" x 26" / 521x660
Tractive Effort (lbs / kg)35,511 / 16107.54
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.89
Heating Ability
Firebox Area (sq ft / m2)178 / 16.54
Grate Area (sq ft / m2)24.70 / 2.29
Evaporative Heating Surface (sq ft / m2)1953 / 181.44
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1953 / 181.44
Evaporative Heating Surface/Cylinder Volume196.63
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4817
Same as above plus superheater percentage4817
Same as above but substitute firebox area for grate area34,710
Power L14744
Power MT227.36