Burlington, Cedar Rapids & Minnesota / Burlington, Cedar Rapids & Northern / Chicago, Kansas & Nebraska / Choctaw & Memphis / Choctaw & Northern / Choctaw, Oklahoma & Gulf / Paris 1867 / Rock Island / Rock Island 4-4-0 "American" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class 119/B-15/E-15 (Locobase 12362)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 22, p. 147. Works numbers were 17042-17044 in September 1899.

Within a year after the delivery of this trio of Eight-wheelers, the 282 miles of the C&M was incorporated into the Choctaw, Oklahoma & Gulf parent company and renumbered twice. Following the latter railroad's absorption by the Rock Island, the 42-44 were again renumbered (first with a zero added, then the 4 changed to 5) and placed in classes that were redesignated often.

They were scrapped as E-15s, the 520 in October 1925 and the other two in May 1934.


Class 2/B-15/E-15 (Locobase 12364)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 22, p. 147. Works numbers were 18771 in March 1901 and 19459 in August.

Within a year after the delivery of this trio of Eight-wheelers, the C & N was incorporated into the Chicago, Oklahoma & Gulf parent company.


Class 26/B-15/E-14/E-15 (Locobase 12363)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 22, p. 147. Works numbers were 17044, 17142-17143 in October 1899; 18772, 18782 in March 1900; 19096-19097 in June; 19404 in August 1901.

As with the other CO&G engines, this set went through several renumberings and reclassifications once the Rock Island took over the CO & G in 1904.

518 was destroyed in October 1925, 519 scrapped in April 1934, and 717 scrapped in April 1938.


Class 46/B-13-4-C (Locobase 7183)

Data from RI 11 - 1903 Locomotive Class & Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. The class was built in the Rock Island's own shops in November-December 1882.


Class America (Locobase 11278)

Data from William P Blake (ed), Reports of the United States Commissioners to the Paris Universal Expositions, 1867 (Washington, DC: Government Printing Office, 1870)., p. 8-12, 300. See also O S Nock, Railways in the Formative Years, 1851-1895 (New York: The Macmillan Company, 1973), pl 81. Works number was 463 in January 1867.

The change of the builder's name in 1867 from New Jersey Locomotive Works to Grant Locomotive Works resulted from the Grant family's control (father Oliver DeForest, sons David B and R Suydam) in 1863-1864. Obviously intent on a display of their capabilities, and perhaps owning a sense of triumph evoked by the Union victory in the American Civil War, they offered to the 1867 Paris Exposition what may have been the most fulsomely decorated engine ever put on American rails. It cost a steep $42,000 in 1867.

In the description of this show engine presented at the 1867 Paris Exposition, the Commissioners (p. 12) commented on the contrast between the usual output of "..continental minds, the majority of whom are imbued with exceedingly plain ideas on the subject of locomotive ornamentation. Some go so far as to consider any attempt at the latter a grave misdemeanor, and paint their entire engines a solemn lead color or funereal black, without a single pencilling of gay colors to relieve the dull monotony."

Not so the Grant engine: "Of course, the contrast was very marked between such and the "America," with her bright German silver jacketing on boiler, cylinders, chimney, and head-light, her cab beautifully inlaid with ash, maple, black-walnut, mahogany, and cherry; with the tender, shaded, striped, and ornamented in a manner common to American practice."

Other encomia (recorded in Anthony J. Branculli's 1991 Iron Rails in the Garden State, p.21) included "a poem in iron and silver" and Zerah Colborn's comparison of the cab to those of "...the offices of professional gentlemen rather than the posts of duty of hard-handed engine drivers."

(Those who are aware of how soon US locomotives would adopt an even more severe style can appreciate the irony of this celebration of peacock sensibilities.)

The comments also singled out one mechanical feature -- the counterbalancing of the link motion by volute springs instead of weights. The usual load is given as 200 tons at speeds of 40-50 mph (65-80 km/h).

Carrying away a Gold Medal for its efforts, the America went into service on the Rock Island. It headed the inaugural train to Council Bluffs, Iowa. According to O S Nock, America "...established herself as something of a 'flyer' on the Chicago-Omaha mail service ...It is said that during that exciting period her driver [sic] was a stripling of 19 years!"

She later pulled pay trains and was retired in 1900.


Class B-10-47-A (Locobase 7179)

Data from RI 11 - 1903 Locomotive Class & Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

Delivered in 1870-1871 as part of the large Hinkley order shown in Locobase 7177, this pair was rebuilt in 1891 with longer-stroke cylinders and heavier boilers. It remained in service for more than four decades before being retired in March 1915.


Class B-11-21-A/21-E (Locobase 7180)

Data from RI 11 - 1903 Locomotive Class & Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. DeGolyer, Volume 7, p. 223. Works numbers 3833, 3835 in February 1876 and 3915, 3921 in June.

Iowa (32) was soon renumbered 36 and was followed by Minnesota (33), Hawkeye, and Des Moines. The latter two had minor changes, including an increase in tender water capacity from 2,000 to 2,375 US gallons (7,570 to 8,989 litres).The last two arrived in August 1876 as the BCR&M was being reorganized as the BCR&Northern. At the turn of the century, they were taken into the Rock Island.


Class B-11-21-B/21-D (Locobase 7181)

Data from RI 11 - 1903 Locomotive Class & Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. See also DeGolyer, Volume 6, p. 138. Hinkley produced 16-17 in September 1871, 20 in February 1872, 18-19 in March, and 23 in December. Baldwin's works numbers for 24, 28-29 were 2870 in August 1872, 3086-3087 in January 1873.


Class B-12 (Locobase 7225)

Data from RI to 1951 Combined Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. See also DeGolyer, Volume 10, p. 273. Works numbers were 5278 in September 1880; 5515, 5520 in February 1881; 5840-5841, 5858-5859 in October; 5893, 5903, 5905 in November; 6346, 6353 in August 1882; 6454, 6452 in November.

A class of Baldwin freight Eight-wheelers that had smaller boilers than the B-14s that were delivered in 1877. The diagram shows that building dates included 1872 (works number 2870), 1880-1882. The other locomotives shown in Connelly's Baldwin list are 3086-3087 from 1873.They became Burlington, Cedar Rapids & Northern engines in 1876 and Rock Island locomotives in 1902.


Class B-12/B-13 46-A/46-B (Locobase 7182)

Data from RI 11 - 1903 Locomotive Class & Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

Given that the numbering in the diagram book was post-hoc, the actual order of this home-built class not discernible from that series. They ran: 318-322, 324-327, 330-332, 334-339, 341-358, 360-361.


Class B-13-4-D/B-13-51-A//MP-4d (Locobase 7184)

Data from RI 11 - 1903 Locomotive Class & Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 5264 in September 1880 and 6491 in December 1882


Class B-14-6-A/B-14-23-A (Locobase 7185)

Data from RI 11 - 1903 Locomotive Class & Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

A relatively large class of Americans, once again renumbered later and once again possessing two different motive power class identifications based on manufacturer. Chicago, Rock Island & Pacific built all but 467-471, which were delivered by Brooks as 6-Bs in 1888 (works numbers 1325-1329) . The Rock had supplied 14 23-As in 1886 and 8 23-A (471-475) in 1887.


Class B-15/12-C (Locobase 7187)

Data from RI 11 - 1903 Locomotive Class & Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 1325-1329 in January 1888.

Locobase is intrigued by the great precision shown in many of the Rock Island's boiler-pressure figures. This set of Brooks engines date back to the C K & N era. They were slightly larger than earlier Eight-wheelers, but the big jump in grate area had yet to happen.


Class B-16/26-A (Locobase 7188)

Data from RI 11 - 1903 Locomotive Class & Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

A numerous class of Eight-wheelers that summarizes Rock Island practice up to that point. The boiler and grate have grown little, but the stride of the two driven axles has lengthened and the engine now put more than 53 tons on the rails. 619-631


Class B-17/26-B (Locobase 7189)

Data from RI 11 - 1903 Locomotive Class & Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

The only difference between these and the 38 built as 26-A (Locobase 7188) was the latter's 68" drivers. Those were more purely passenger locomotives while these served mixed-traffic trains.


Class B-19-22-A (Locobase 3141)

Data from RI 11 - 1903 Locomotive Class & Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

This class, produced by the railroad, seems to have been the first express passenger design on the Rock Island. The boiler and grate have both grown considerably and the tall drivers invite higher speeds.

The deep firebox and generous boiler proportions may have been intended to allow free-steaming even at high speed. Designed by the CRI&P's Superintendent of Motive Power and Equipment George F. Wilson, they had 8" diameter dry pipes, and large steam and exhaust ports. Each Richardson balanced valve weighed 161 lb.


Class B-20/E-18-67 (Locobase 7227)

Data from RI to 1951 Locomotive Dgmd Comb of Books supplied in May 2005 by Allen Stanley from his extensive Raildata collection. See also DeGolyer, Volume 24, p. 246. Works numbers were 20327-20330, 20386-20387 in April 1902; 21111-21112, 21137 in October; 21373 in December; 21475, 21508 in January 1903.

For 1902, this was an outdated design in many respects. The grate was particularly small and the firebox quite deep, and it was dropped between the driving axles in a style that was then 20 years old. On the other hand, the stroke length was "modern" as was the boiler pressure for a light passenger Eight-wheeler. The tender trucks were spread "as far apart as total wheel base of Engine and Tender will admit."

If Locobase understands Connelly's notes correctly, these locomotives were rebored twice. The first time the cylinders were bored out to 20", later the bore was reduced to 18", possibly as the cylinders wore and the shops inserted sleeves. Updating the boiler included reducing the tube count from 275 to 262 (tube heating surface fell by 82 sq ft/7.6 sq m). Driver diameter increased from 72" to 74".

The class lasted for about 30 years, the first being scrapped in April 1927, the last in August 1934.


Class B-9 (Locobase 7178)

Data from RI 11 - 1903 Locomotive Class & Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

This engine was delivered as BCR&Minnesota's #7 as part of the large order produced by Hinkley in 1870-1871. Almost twenty years later, it was rebuilt with more cylinder volume and a few more tubes in a new boiler.


Class B-9-8-A (Locobase 7177)

Data from RI 11 - 1903 Locomotive Class & Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

Although a small builder from Boston, Hinkley managed to secure purchasers from all over the country. This set of low-powered local Eight-wheelers proved durable as they served the BCR&M, its successor BCR&Northern, and in a few cases, the Rock Island when that line acquired the BCR&N in 1902. All were rebuilt in the late 1880s.


Class E-13-64-A (Locobase 7226)

Data from RI 11 - 1903 Locomotive Class & Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

Locobase doesn't think the construction date for this pair of Eight-wheelers is close to correct and opts for a date before 1880. 1899 might have been the year the railroad acquired the two little Americans in a merger.


Class MP 4-E (Locobase 7186)

Data from RI 11 - 1903 Locomotive Class & Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

Baldwin delivered several small batches of Eight-wheelers built to the same specs, but differing in driver diameter and cylinder diameter. Four of these were works numbers 4151-4152 in September 1877, 4280 in February 1878, and 4765 in September 1879. Beginning in 1888, the BCR&N put on a much bigger boiler on this quartet and rolled them out on passenger-sized 69" drivers.

Three remained with the railroad until 1912, when they were sold for scrap. 380, the oldest of the four, wasn't scrapped until 1922.


Class MP 4-F (Locobase 15944)

Data from RI 11 - 1903 Locomotive Class & Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

As mentioned in Locobase 7186, Baldwin delivered several small batches of Eight-wheelers to the BCR&N. This group had works numbers 5518-5519 in March 1881 and 5916, 5920 in December.

Eight were rebuilt with much larger boilers and taller drivers. The four shown in Locobase 7186 had 69" drivers

The present quartet were identical, but had 63" wheels. They were rebuilt in 1901-1902.

Specifications by Steve Llanso of Sweat House Media
Class119/B-15/E-152/B-15/E-1526/B-15/E-14/E-1546/B-13-4-CAmerica
Locobase ID12362 12364 12363 7183 11278
RailroadChoctaw & Memphis (CRI & P)Choctaw & Northern (CRI&P)Choctaw, Oklahoma & Gulf (CRI & P)Burlington, Cedar Rapids & Northern (CRI&P)Paris 1867 / Rock Island (CRI & P)
CountryUSAUSAUSAUSAUSA
Whyte4-4-04-4-04-4-04-4-04-4-0
Number in Class32861
Road Numbers119-121 / 29-31 / 42-44 / 420-4222-3/31-32/413-41426-28, 84-87, 83/417-19,423-26, 41670-75/47-52/368-373109
GaugeStdStdStdStdStd
Number Built32861
BuilderBurnham, Williams & CoBurnham, Williams & CoBurnham, Williams & CoRock IslandGrant
Year18991899189918821867
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase 9.08' 9.08' 9.08' 8.25' 8.50'
Engine Wheelbase23.82'23.82'23.82'22.21'22.29'
Ratio of driving wheelbase to overall engine wheebase 0.38 0.38 0.38 0.37 0.38
Overall Wheelbase (engine & tender)42.71'
Axle Loading (Maximum Weight per Axle)0
Weight on Drivers74500 lbs74500 lbs74500 lbs51120 lbs44800 lbs
Engine Weight114500 lbs114500 lbs114500 lbs79520 lbs61600 lbs
Tender Light Weight65000 lbs65000 lbs65000 lbs62000 lbs40320 lbs
Total Engine and Tender Weight179500 lbs179500 lbs179500 lbs141520 lbs101920 lbs
Tender Water Capacity3500 gals3500 gals3500 gals2900 gals2018 gals
Tender Fuel Capacity (oil/coal)6 tons0 tons
Minimum weight of rail (calculated)62 lb/yard62 lb/yard62 lb/yard43 lb/yard37 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter68"68"68"63"67"
Boiler Pressure160 psi160 psi160 psi135 psi130 psi
Cylinders (dia x stroke)18" x 24"18" x 24"18" x 24"17" x 24"16" x 22"
Tractive Effort15552 lbs15552 lbs15552 lbs12633 lbs9289 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.79 4.79 4.79 4.05 4.82
Heating Ability
Firebox Area154.80 sq. ft154.80 sq. ft154.80 sq. ft115 sq. ft75.32 sq. ft
Grate Area18.50 sq. ft18.50 sq. ft18.50 sq. ft15.34 sq. ft15.50 sq. ft
Evaporative Heating Surface1646 sq. ft1646 sq. ft1646 sq. ft1078 sq. ft872 sq. ft
Superheating Surface
Combined Heating Surface1646 sq. ft1646 sq. ft1646 sq. ft1078 sq. ft872 sq. ft
Evaporative Heating Surface/Cylinder Volume232.86232.86232.86170.98170.32
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation29602960296020712015
Same as above plus superheater percentage29602960296020712015
Same as above but substitute firebox area for grate area247682476824768155259792
Power L162086208620837163540
Power MT367.42367.42367.42320.52348.41

Specifications by Steve Llanso of Sweat House Media
ClassB-10-47-AB-11-21-A/21-EB-11-21-B/21-DB-12B-12/B-13 46-A/46-B
Locobase ID7179 7180 7181 7225 7182
RailroadBurlington, Cedar Rapids & Northern (CRI&P)Burlington, Cedar Rapids & Minnesota (CRI&P)Burlington, Cedar Rapids & Northern (CRI & P)Burlington, Cedar Rapids & Northern (CRI&P)Rock Island (CRI&P)
CountryUSAUSAUSAUSAUSA
Whyte4-4-04-4-04-4-04-4-04-4-0
Number in Class2491938
Road Numbers203, 20532-35/46, 43-45/264, 261-26316-20, 23-24, 28-29/258, 257, 259, 265, 256, 26044-45, 52-59, 64-67/ 107-125/385-402318+
GaugeStdStdStdStdStd
Number Built491938
BuilderBCR&NBurnham, Parry, Williams & CoseveralBurnham, Parry, Williams & CoRock Island
Year18911877187118801879
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase8'8' 8.25' 8.25' 8.25'
Engine Wheelbase21.75'21.71'22.31'22.22'22.33'
Ratio of driving wheelbase to overall engine wheebase 0.37 0.37 0.37 0.37 0.37
Overall Wheelbase (engine & tender)42.58'41.73'43.60'42.47'43.75'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers45300 lbs44700 lbs50000 lbs48000 lbs47000 lbs
Engine Weight73420 lbs71200 lbs79250 lbs77700 lbs77000 lbs
Tender Light Weight62900 lbs62900 lbs60533 lbs58000 lbs50000 lbs
Total Engine and Tender Weight136320 lbs134100 lbs139783 lbs135700 lbs127000 lbs
Tender Water Capacity2800 gals2880 gals2500 gals2580 gals2380 gals
Tender Fuel Capacity (oil/coal)6 tons6 tons8 tons6.5 tons8 tons
Minimum weight of rail (calculated)38 lb/yard37 lb/yard42 lb/yard40 lb/yard39 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter63"63"64"57"63"
Boiler Pressure130 psi130 psi130 psi130 psi140 psi
Cylinders (dia x stroke)15" x 24"16" x 24"16" x 24"17" x 24"17" x 24"
Tractive Effort9471 lbs10776 lbs10608 lbs13446 lbs13101 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.78 4.15 4.71 3.57 3.59
Heating Ability
Firebox Area115 sq. ft115 sq. ft121.50 sq. ft112 sq. ft100 sq. ft
Grate Area15.34 sq. ft15.34 sq. ft16.30 sq. ft16.30 sq. ft15.39 sq. ft
Evaporative Heating Surface949 sq. ft954 sq. ft1046 sq. ft1039 sq. ft1026 sq. ft
Superheating Surface
Combined Heating Surface949 sq. ft954 sq. ft1046 sq. ft1039 sq. ft1026 sq. ft
Evaporative Heating Surface/Cylinder Volume193.33170.81187.29164.79162.73
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation19941994211921192155
Same as above plus superheater percentage19941994211921192155
Same as above but substitute firebox area for grate area1495014950157951456014000
Power L142383737410531323558
Power MT412.50368.62362.00287.70333.79

Specifications by Steve Llanso of Sweat House Media
ClassB-13-4-D/B-13-51-A//MP-4dB-14-6-A/B-14-23-AB-15/12-CB-16/26-AB-17/26-B
Locobase ID7184 7185 7187 7188 7189
RailroadBurlington, Cedar Rapids & Northern (CRI&P)Chicago, Kansas & Nebraska (CRI&P)Chicago, Kansas & Nebraska (CRI&P)Rock Island (CRI&P)Rock Island (CRI&P)
CountryUSAUSAUSAUSAUSA
Whyte4-4-04-4-04-4-04-4-04-4-0
Number in Class22753813
Road Numbers43, 69/374-375467-476, 525-540, 571467-498 / 593-596601-618, 632-652619-631
GaugeStdStdStdStdStd
Number Built2753813
BuilderBCR&NseveralBrooksRock IslandRock Island
Year18781886188818901891
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase 8.25' 8.25' 8.50'9'9'
Engine Wheelbase22.19'22.33'23.08'23.62'23.62'
Ratio of driving wheelbase to overall engine wheebase 0.37 0.37 0.37 0.38 0.38
Overall Wheelbase (engine & tender)42.97'44'45.73'45.25'45.25'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers52800 lbs54400 lbs60000 lbs69800 lbs69000 lbs
Engine Weight83800 lbs88700 lbs93700 lbs107300 lbs106800 lbs
Tender Light Weight67383 lbs60000 lbs63650 lbs71000 lbs70000 lbs
Total Engine and Tender Weight151183 lbs148700 lbs157350 lbs178300 lbs176800 lbs
Tender Water Capacity3100 gals2500 gals4000 gals3200 gals3000 gals
Tender Fuel Capacity (oil/coal)8 tons5 tons8.5 tons5 tons5 tons
Minimum weight of rail (calculated)44 lb/yard45 lb/yard50 lb/yard58 lb/yard58 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter63"67"68"68"64"
Boiler Pressure160 psi145 psi152 psi160 psi160 psi
Cylinders (dia x stroke)17" x 24"18" x 24"18" x 24"18" x 24"18" x 24"
Tractive Effort14973 lbs14304 lbs14774 lbs15552 lbs16524 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.53 3.80 4.06 4.49 4.18
Heating Ability
Firebox Area121.50 sq. ft120 sq. ft137 sq. ft145 sq. ft145 sq. ft
Grate Area16.30 sq. ft15.26 sq. ft17 sq. ft17.60 sq. ft17.60 sq. ft
Evaporative Heating Surface1242 sq. ft1228 sq. ft1465 sq. ft1482 sq. ft1482 sq. ft
Superheating Surface
Combined Heating Surface1242 sq. ft1228 sq. ft1465 sq. ft1482 sq. ft1482 sq. ft
Evaporative Heating Surface/Cylinder Volume196.99173.73207.26209.66209.66
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation26082213258428162816
Same as above plus superheater percentage26082213258428162816
Same as above but substitute firebox area for grate area1944017400208242320023200
Power L149284187524056625329
Power MT411.53339.37385.07357.67340.53

Specifications by Steve Llanso of Sweat House Media
ClassB-19-22-AB-20/E-18-67B-9B-9-8-AE-13-64-A
Locobase ID3141 7227 7178 7177 7226
RailroadBurlington, Cedar Rapids & Northern (CRI & P)Choctaw, Oklahoma & Gulf (CRI & P)Burlington, Cedar Rapids & Northern (CRI&P)Burlington, Cedar Rapids & Minnesota (CRI&P)Rock Island (CRI & P)
CountryUSAUSAUSAUSAUSA
Whyte4-4-04-4-04-4-04-4-04-4-0
Number in Class1312192
Road Numbers1101-1113/661-673153-164/45-56/674-6852065, 7, 9-15/201-202411-412
GaugeStdStdStdStdStd
Number Built131292
BuilderRock IslandBurnham, Williams & CoBCR&NHinkleyRock Island
Year18981902188818701899
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase 8.50' 9.17' 8.25'8' 8.33'
Engine Wheelbase30.81'24.58'21.75'21.75'22.33'
Ratio of driving wheelbase to overall engine wheebase 0.28 0.37 0.38 0.37 0.37
Overall Wheelbase (engine & tender)48.46'49.62'41.98'42.58'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers83000 lbs78000 lbs47200 lbs43180 lbs60000 lbs
Engine Weight125000 lbs127000 lbs74760 lbs70230 lbs93000 lbs
Tender Light Weight78000 lbs75000 lbs62900 lbs60196 lbs70000 lbs
Total Engine and Tender Weight203000 lbs202000 lbs137660 lbs130426 lbs163000 lbs
Tender Water Capacity4000 gals4000 gals2880 gals2200 gals3500 gals
Tender Fuel Capacity (oil/coal)8 tons10 tons88 tons6 tons8 tons
Minimum weight of rail (calculated)69 lb/yard65 lb/yard39 lb/yard36 lb/yard50 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter78"74"69"63"63"
Boiler Pressure190 psi190 psi126 psi130 psi140 psi
Cylinders (dia x stroke)19.5" x 26"19" x 26"15.5" x 24"15" x 22"17" x 24"
Tractive Effort20470 lbs20484 lbs8950 lbs8682 lbs13101 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.05 3.81 5.27 4.97 4.58
Heating Ability
Firebox Area193.30 sq. ft163.30 sq. ft115 sq. ft115 sq. ft133.40 sq. ft
Grate Area24.50 sq. ft17.53 sq. ft15.34 sq. ft15.34 sq. ft16.50 sq. ft
Evaporative Heating Surface1988 sq. ft1809 sq. ft949 sq. ft949 sq. ft1174 sq. ft
Superheating Surface
Combined Heating Surface1988 sq. ft1809 sq. ft949 sq. ft949 sq. ft1174 sq. ft
Evaporative Heating Surface/Cylinder Volume221.21212.02181.06210.90186.20
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation46553331193319942310
Same as above plus superheater percentage46553331193319942310
Same as above but substitute firebox area for grate area3672731027144901495018676
Power L181207211421346234292
Power MT431.36407.63393.56472.07315.41

Specifications by Steve Llanso of Sweat House Media
ClassMP 4-EMP 4-F
Locobase ID7186 15944
RailroadBurlington, Cedar Rapids & Northern (CRI&P)Burlington, Cedar Rapids & Northern (CRI&P)
CountryUSAUSA
Whyte4-4-04-4-0
Number in Class44
Road Numbers42-43, 37, 39/376-38049-50, 60-61/112-113, 122, 119/390-391, 381-382
GaugeStdStd
Number Built
BuilderRIBCR&N
Year18881901
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase 8.25' 8.25'
Engine Wheelbase22.22'22.22'
Ratio of driving wheelbase to overall engine wheebase 0.37 0.37
Overall Wheelbase (engine & tender)42.95'42.95'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers54200 lbs54200 lbs
Engine Weight87100 lbs87100 lbs
Tender Light Weight67380 lbs67383 lbs
Total Engine and Tender Weight154480 lbs154483 lbs
Tender Water Capacity3100 gals3100 gals
Tender Fuel Capacity (oil/coal)8 tons8 tons
Minimum weight of rail (calculated)45 lb/yard45 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter57"57"
Boiler Pressure160 psi160 psi
Cylinders (dia x stroke)17" x 24"17" x 24"
Tractive Effort16549 lbs16549 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.28 3.28
Heating Ability
Firebox Area115 sq. ft121.50 sq. ft
Grate Area16.30 sq. ft16.30 sq. ft
Evaporative Heating Surface1370 sq. ft1370 sq. ft
Superheating Surface
Combined Heating Surface1370 sq. ft1370 sq. ft
Evaporative Heating Surface/Cylinder Volume217.29217.29
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation26082608
Same as above plus superheater percentage26082608
Same as above but substitute firebox area for grate area1840019440
Power L146894767
Power MT381.46387.80

Reference


If you have any railroad data such as diagram books, rail station plans or anything else that you would be willing to share, please contact us.