Atlanta Knoxville & Northern / Birmingham, Selma & New Orleans / Chesapeake & Nashville / Kentucky Central / Kentucky Highlands / Louisiana & NorthWest / Louisville & Nashville / Louisville, Cincinnati & Lexington / Marietta & North Georgia / Mobile & Montgomery / Pensacola & Atlantic 4-4-0 "American" Locomotives in the USA

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Class Details by Steve Llanso of Sweat House Media

Class 11-12 (Locobase 16068)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 13. p 219 and Volume 14, p. 169. Works numbers were 9597-9598 in November 1888 and 13096 in December 1892.

These were delivered to the M&NG, which converted to standard gauge at that time and established a through route from Atlanta to Knoxville. Locobase uses heating surface data from a set of Virginia & Midland engines (Locobase 11870) delivered in 1887 and fitted with exactly the same firebox dimensions as well as identical counts, diameters, and lengths of firetubes.

Alas, the M&NG entered receivership in 1891 and only re-emerged in 1896 as the Atlanta, Knoxville & Northern. In 1902, the Louisville & Nashville took over the AK & N and renumbered this trio 137-139.


Class 11/D-0 (Locobase 9767)

Data from L&N 8 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 3034, 3036 in July 1882.

Prince's list had several class D-0 locomotives, but an evaluation of present and former road numbers using both Gene Connelly's roster and the Railroad & Locomotive History roster shows that at the very least, the data refer to the two locomotive works numbers shown above.

These engines were delivered to the P&A and turned over to the Louisville & Nashville in 1891 and renumbered. Renumbered again in 1897 as numbers 2 & 3, the pair was divided by a later variation in wheel diameter. 62" road #2 was classed D-0 and her stablemate was placed in class D-8 with 68" drivers.


Class 15/D-0 (Locobase 9773)

Data from L&N 8 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.


Class 5/D-0 (Locobase 9771)

Data from L&N 8 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works number is uncertain.


Class 67/D-0, D-8 (Locobase 9778)

Data from L&N 8 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. DeGolyer, Volume 5, pp. 19 and 87. Baldwin works numbers were 2080, 2083-2084, 2086-2087, 2090 in February 1870; 2093, 2096-2097, 2101 in March; 2212, 2215-2218 in August.

When these engines were delivered, they had 160 fire tubes that measured 11 ft 8 in (3.56 m) long each. As with the 1882 Rogers locomotives shown in Locobase 9777, it's likely, however, that the available data describes a later update that merged the nineteen locomotives by fitting them all with the same boiler.

One of this class was converted in 1875 to a Ten-wheeler that ran on 58" wheels and was driven by 18" x 24" cylinders. A few others were rebuilt, but most served the L & N in the 20th Century.

The first retired in 1914, the last in 1933.


Class 76/D3 (Locobase 9677)

Data from Emory Edwards, Modern American Locomotive Engines, (Philadelphia: Henry Carey Baird & Co, 1883), pp. 120, 125. Works numbers were 2436 in April 1876, 2437 in August.

Shown in a table of drawings and data describing the locomotives shown at the Philadelphia Centennial Exhibition of 1876, this design featured the biggest, broadest stack. A wood-burning engine needed a lot of spark-arresting area to capture all the cinders and this engine's cabbage stack looked equal to the task.

When the M&M was taken over by the L&N, these engines were placed in class D3.


Class 9 (Locobase 12660)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 25, p. 225. Works number was 22183 in May 1903.

Obviously the L & NW was lightly built because this Eight-wheeler significantly underachieved compared to other 4-4-0s then in service on the US standard-gauge lines.

NB: Evaporative and direct heating surface areas are estimates based on locomotive supplied to the Charleston & West Virginia (Locobase 12255) whose tube count and length were identical and whose firebox dimensions varied by only 1/8" of an inch in grate length.


Class D-0 (Locobase 8142)

Data from L&N 8 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

According to a compilation of Pittsburgh locomotives by B.Rumary (25 Kingscombe, Gurney Slade, Radstock, BA3 4TH, ENGLAND) and supplied to Locobase by Allen Stanley in March 2004, works numbers for 107 was 772 and it was delivered in February 1887.

When it was delivered, the 33 ranked in the top third in the size of boiler, but its relatively large firebox and grate areas exceeded an even higher percentage of Eight-wheelers put into service in the mid-1880s.


Class D-0 (Locobase 9768)

Data from L&N 8 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works number may have been 4402 and it may originally have been ordered by the Findlay, Ft Wayne & Western as their #3.


Class D-0 (Locobase 9769)

Data from L&N 8 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

This quintet was delivered to the L&N in 1870 (Locobase 9778) as part of a bigger order. Many were rebuilt by the railroad in last few years of the Century. Originally numbered 83-87 with works numbers 2212, 2216-2218, and 2215, the group was rebuilt to the dimensions shown above.


Class D-0 (Locobase 9770)

Data from L&N 8 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.


Class D-0 (Locobase 9775)

Data from L&N 8 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.


Class D-0 (Locobase 9776)

Data from L&N 8 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.


Class D-0/D-12 (Locobase 9774)

Data from L&N 8 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.


Class D-10/D-0 (Locobase 9780)

Data from L&N 8 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 3607-3608 in January 1886, 3615-3616 in February, 3617-3618 in March.

These were delivered with 67" drivers, but by 1927, the engines had been fitted with 64" drivers.


Class D-11 (Locobase 9772)

Data from L&N 8 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

The firebox heating surface includes 14 sq ft of arch tubes.


Class D-11 (Locobase 9781)

Data from L&N 8 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.


Class D-13 (Locobase 9783)

Data from L&N 8 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

The firebox heating surface includes 14 sq ft of arch tubes.


Class D-14 (Locobase 9784)

Data from L&N 8 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also DeGolyer, Volume 10, p. 207. Baldwin works numbers included 6152, 6158 in April 1882; 6378-6379 in September; and 6558, 6560 in January 1883.

The L&N's diagram suggests that this class was rebuilt with a stronger boiler. As laid out in the 1882 specifications, the engine was to put 46,000 lb (20,865 kg) on the drivers and 70,000 lb (31,752 kg) for the engine.

Kentucky Central was taken into the Louisville & Nashville by 1891, at which point this class was renumbered 433-438. Six years later the class was again renumbered 38-43. The class was scrapped over a 15-year period from 1916 to 1931.


Class D-15 (Locobase 9785)

Data from L&N 8 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

The L&N took over these three Eight-wheelers when they bought out the Atlanta, Knoxville & Northern. For the most part, the engines were unchanged from the time they were delivered in 1887 to the Marietta & North Georgia (Locobase 16068).

Years later, the class received new boilers and fireboxes that were substantially smaller than the original.. The firebox heating surface includes 14 sq ft of arch tubes. 137's driver diameter was now 63"; 138-139 rolled on 64" wheels. The latter two put 1,200 lb more weight on their 64" drivers, which contributed to a 1,600-lb increase in overall engine .

So renewed, all three locomotives rendered almost two decades more service before being scrapped in 1933.


Class D-16 (Locobase 9786)

Data from L&N 8 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.


Class D-20 (Locobase 9789)

Data from L&N 8 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

This Eight-wheeler was rebuilt by the L&N from one of two Rhode Island-built 4-6-0s delivered in 1891 to the Atlanta, Knoxville & Northern as their #29. (Originally numbered 23, this was works number 2359 and was delivered as one of a pair, the other being works number 2360 and road 24.)

When modified, the firebox heating surface included 11 sq ft of arch tubes. The 141 was scrapped in 1934.


Class D-20 (Locobase 9790)

Data from L&N 8 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

This Eight-wheeler was rebuilt by the L&N from a Rhode Island-built 4-6-0 built in 1891 for the Atlanta, Knoxville & Northern as their #30. When modified, the firebox heating surface included 11 sq ft of arch tubes. The 142 operated until 1937.


Class D-21 (Locobase 9791)

Data from L&N 8 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

When the L&N acquired these locomotives in 1891 with the Alabama Mineral Road, they were still the Ten-wheelers they'd been when Baldwin (as Burnham, Parry, Williams & Co) delivered to the Anniston & Cincinnati in 1889 (Locobase 11571).

In 1906, the two were converted to the 4-4-0 layout shown in this entry. The makeover involved installing a longer boiler with more tubes as well as a larger grate.

The 144 was scrapped in 1934, but the 143 served throughout World War II before its dismantling in 1946.


Class D5 (Locobase 9777)

Data from L&N 8 1927 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 3015-3018 in June 1882.

A quartet of Eight-wheelers from Paterson, these local passenger engines were produced a dozen years after the 1870 batch from Baldwin shown in Locobase 9778. It's likely, however, that the available data describes a later update that merged the nineteen locomotives by fitting them all with the same boiler.

943 was later renumbered 939, then took 10 to join the others now numbered 11-13.

Specifications by Steve Llanso of Sweat House Media
Class11-1211/D-015/D-05/D-067/D-0, D-8
Locobase ID16,068 9767 9773 9771 9778
RailroadMarietta & North Georgia (L&N)Pensacola & Atlantic (L&N)Louisville & Nashville (L&N)Chesapeake & Nashville (L&N)Louisville & Nashville (L&N)
CountryUSAUSAUSAUSAUSA
Whyte4-4-04-4-04-4-04-4-04-4-0
Number in Class221115
Road Numbers11-12, 1011-12/430-431/2-315/1085/6267-76, 82-86/17, 19-44
GaugeStdStdStdStd5'
Number Built221115
BuilderBurnham, Parry, Williams & CoRogersL&NRogersM. Baird & Co
Year18881882187918871870
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 8.75 / 2.67 8.50 / 2.59 8.83 / 2.69 8.50 / 2.598 / 2.44
Engine Wheelbase (ft / m)22.83 / 6.9622.83 / 6.9622.75 / 6.9322.50 / 6.8622.58 / 6.88
Ratio of driving wheelbase to overall engine wheebase 0.38 0.37 0.39 0.38 0.35
Overall Wheelbase (engine & tender) (ft / m)44.42 / 13.5447.08 / 14.3547.21 / 14.3947.46 / 14.4746.83 / 14.27
Axle Loading (Maximum Weight per Axle) (lbs / kg)29,500 / 13,38133,000 / 14,96930,400 / 13,78929,300 / 13,290
Weight on Drivers (lbs / kg)62,000 / 28,12356,000 / 25,40163,000 / 28,57661,600 / 27,94156,000 / 25,401
Engine Weight (lbs / kg)98,000 / 44,45290,000 / 40,823101,000 / 45,813102,700 / 46,58490,000 / 40,823
Tender Loaded Weight (lbs / kg)88,600 / 40,18880,000 / 36,28779,800 / 36,19797,900 / 44,40775,200 / 34,110
Total Engine and Tender Weight (lbs / kg)186,600 / 84,640170,000 / 77,110180,800 / 82,010200,600 / 90,991165,200 / 74,933
Tender Water Capacity (gals / ML)3000 / 11.363800 / 14.393700 / 14.024200 / 15.913500 / 13.26
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)7 / 6.407 / 6.4011 / 107 / 6.40
Minimum weight of rail (calculated) (lb/yd / kg/m)52 / 2647 / 23.5053 / 26.5051 / 25.5047 / 23.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)62 / 157564 / 162664 / 162663 / 160062 / 1727
Boiler Pressure (psi / kPa)130 / 9140 / 9.70155 / 10.70140 / 9.70150 / 10.30
High Pressure Cylinders (dia x stroke) (in / mm)18" x 24" / 457x61017" x 24" / 432x61018" x 24" / 457x61017" x 24" / 432x61017" x 24" / 432x610
Tractive Effort (lbs / kg)13,859 / 6286.3412,897 / 5849.9916,008 / 7261.1213,101 / 5942.5214,264 / 6470.05
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.47 4.34 3.94 4.70 3.93
Heating Ability
Firebox Area (sq ft / m2)136 / 12.63108 / 10.04126 / 11.71125 / 11.62100 / 9.29
Grate Area (sq ft / m2)17.60 / 1.6416 / 1.4917 / 1.5816.50 / 1.5315.50 / 1.44
Evaporative Heating Surface (sq ft / m2)1603 / 148.921075 / 99.911321 / 122.771206 / 112.081068 / 99.26
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1603 / 148.921075 / 99.911321 / 122.771206 / 112.081068 / 99.26
Evaporative Heating Surface/Cylinder Volume226.78170.50186.88191.28169.39
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation22882240263523102325
Same as above plus superheater percentage22882240263523102325
Same as above but substitute firebox area for grate area17,68015,12019,53017,50015,000
Power L143393825456342693855
Power MT308.58301.17319.35305.57303.53

Specifications by Steve Llanso of Sweat House Media
Class76/D39D-0D-0D-0
Locobase ID9677 12,660 8142 9768 9769
RailroadMobile & Montgomery (L&N)Louisiana & NorthWestLouisville & Nashville (L&N)Kentucky Highlands (L&N)Louisville & Nashville (L&N)
CountryUSAUSAUSAUSAUSA
Whyte4-4-04-4-04-4-04-4-04-4-0
Number in Class21115
Road Numbers76, 33/623, 622/1123, 1122/2123, 2122933 / 1073 / 6324, 21, 25-27
GaugeStdStdStdStdStd
Number Built21115
BuilderRogersBurnham, Williams & CoPittsburghRogersL&N
Year18761903188718901895
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 8.33 / 2.54 9.33 / 2.849 / 2.748 / 2.44
Engine Wheelbase (ft / m)22.33 / 6.8123.50 / 7.1623.04 / 7.0222.65 / 6.90
Ratio of driving wheelbase to overall engine wheebase 0.37 0.40 0.39 0.35
Overall Wheelbase (engine & tender) (ft / m)48.17 / 14.6847.83 / 14.5847.15 / 14.37
Axle Loading (Maximum Weight per Axle) (lbs / kg)33,000 / 14,96929,150 / 13,22229,300 / 13,290
Weight on Drivers (lbs / kg)40,900 / 18,55260,000 / 27,21664,000 / 29,03057,550 / 26,10456,000 / 25,401
Engine Weight (lbs / kg)62,000 / 28,12390,000 / 40,823104,000 / 47,17494,550 / 42,88790,000 / 40,823
Tender Loaded Weight (lbs / kg)60,000 / 27,21679,800 / 36,19775,400 / 34,20183,400 / 37,830
Total Engine and Tender Weight (lbs / kg)150,000 / 68,039183,800 / 83,371169,950 / 77,088173,400 / 78,653
Tender Water Capacity (gals / ML)3500 / 13.263700 / 14.023000 / 11.364000 / 15.15
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)7 / 6.407 / 6.407 / 6.40
Minimum weight of rail (calculated) (lb/yd / kg/m)34 / 1750 / 2553 / 26.5048 / 2447 / 23.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)56.50 / 143564 / 162664 / 162668 / 172768 / 1727
Boiler Pressure (psi / kPa)115 / 7.90180 / 12.40155 / 10.70155 / 10.70150 / 10.30
High Pressure Cylinders (dia x stroke) (in / mm)16" x 24" / 406x61016" x 24" / 406x61018" x 24" / 457x61017" x 24" / 432x61017" x 24" / 432x610
Tractive Effort (lbs / kg)10,630 / 4821.6914,688 / 6662.3716,008 / 7261.1213,439 / 6095.8413,005 / 5898.98
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.85 4.08 4.00 4.28 4.31
Heating Ability
Firebox Area (sq ft / m2)97 / 9.01114 / 10.59141 / 13.10103 / 9.57111 / 10.32
Grate Area (sq ft / m2)14.40 / 1.3416.50 / 1.5319 / 1.7714 / 1.3015 / 1.39
Evaporative Heating Surface (sq ft / m2)900 / 83.641190 / 110.591329 / 123.511185 / 110.131143 / 106.23
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)900 / 83.641190 / 110.591329 / 123.511185 / 110.131143 / 106.23
Evaporative Heating Surface/Cylinder Volume161.14213.07188.02187.95181.28
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation16562970294521702250
Same as above plus superheater percentage16562970294521702250
Same as above but substitute firebox area for grate area11,15520,52021,85515,96516,650
Power L126856050475847364578
Power MT289.46444.60327.80362.85360.46

Specifications by Steve Llanso of Sweat House Media
ClassD-0D-0D-0D-0/D-12D-10/D-0
Locobase ID9770 9775 9776 9774 9780
RailroadLouisville & Nashville (L&N)Louisville & Nashville (L&N)Louisville & Nashville (L&N)Louisville & Nashville (L&N)Louisville & Nashville (L&N)
CountryUSAUSAUSAUSAUSA
Whyte4-4-04-4-04-4-04-4-04-4-0
Number in Class111256
Road Numbers293/125127, 130110, 114, 118, 120, 121, 1256, 8, 16, 18, 20, 25/101-106
GaugeStdStdStdStdStd
Number Built1126
BuilderL&NL&NL&NL&NRogers
Year18701885188518811886
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 8.33 / 2.549 / 2.749 / 2.749 / 2.749 / 2.74
Engine Wheelbase (ft / m)22.67 / 6.9123.25 / 7.0923.08 / 7.0323.25 / 7.0923.25 / 7.09
Ratio of driving wheelbase to overall engine wheebase 0.37 0.39 0.39 0.39 0.39
Overall Wheelbase (engine & tender) (ft / m)47.33 / 14.4348.17 / 14.6848.83 / 14.8848.17 / 14.6848 / 14.63
Axle Loading (Maximum Weight per Axle) (lbs / kg)30,800 / 13,97133,000 / 14,96933,000 / 14,96933,000 / 14,96933,100 / 15,014
Weight on Drivers (lbs / kg)59,500 / 26,98963,000 / 28,57663,000 / 28,57663,000 / 28,57663,600 / 28,849
Engine Weight (lbs / kg)94,500 / 42,865101,000 / 45,813101,000 / 45,813101,000 / 45,813101,000 / 45,813
Tender Loaded Weight (lbs / kg)82,600 / 37,46778,000 / 35,380102,000 / 46,26687,000 / 39,46382,600 / 37,467
Total Engine and Tender Weight (lbs / kg)177,100 / 80,332179,000 / 81,193203,000 / 92,079188,000 / 85,276183,600 / 83,280
Tender Water Capacity (gals / ML)3800 / 14.393600 / 13.645000 / 18.944200 / 15.913800 / 14.39
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)8 / 7.307 / 6.4010 / 9.108 / 7.308 / 7.30
Minimum weight of rail (calculated) (lb/yd / kg/m)50 / 2553 / 26.5053 / 26.5053 / 26.5053 / 26.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)64 / 162664 / 162668 / 172764 / 162664 / 1626
Boiler Pressure (psi / kPa)150 / 10.30155 / 10.70155 / 10.70155 / 10.70155 / 10.70
High Pressure Cylinders (dia x stroke) (in / mm)17" x 24" / 432x61018" x 24" / 457x61018" x 24" / 457x61018" x 24" / 457x61018" x 24" / 457x610
Tractive Effort (lbs / kg)13,818 / 6267.7516,008 / 7261.1215,066 / 6833.8316,008 / 7261.1216,008 / 7261.12
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.31 3.94 4.18 3.94 3.97
Heating Ability
Firebox Area (sq ft / m2)85 / 7.90159 / 14.78156 / 14.50131 / 12.17139 / 12.92
Grate Area (sq ft / m2)15.50 / 1.4418 / 1.6718 / 1.6717 / 1.5818 / 1.67
Evaporative Heating Surface (sq ft / m2)1045 / 97.121334 / 123.981334 / 123.981334 / 123.981334 / 123.98
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1045 / 97.121334 / 123.981334 / 123.981334 / 123.981334 / 123.98
Evaporative Heating Surface/Cylinder Volume165.74188.72188.72188.72188.72
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation23252790279026352790
Same as above plus superheater percentage23252790279026352790
Same as above but substitute firebox area for grate area12,75024,64524,18020,30521,545
Power L137304980525446524746
Power MT276.41348.54367.72325.58329.03

Specifications by Steve Llanso of Sweat House Media
ClassD-11D-11D-13D-14D-15
Locobase ID9772 9781 9783 9784 9785
RailroadLouisville & Nashville (L&N)Louisville & Nashville (L&N)Louisville & Nashville (L&N)Kentucky Central (L&N)Louisville & Nashville (L&N)
CountryUSAUSAUSAUSAUSA
Whyte4-4-04-4-04-4-04-4-04-4-0
Number in Class3183363
Road Numbers114, 117, 119109, 112-13,115,117,119,122-23,126-28,131-133111, 124, 1291-6/433-438/38-43137-139
GaugeStdStdStdStdStd
Number Built6
BuilderL&NL & NL & NBurnham, Williams & CoL&N
Year19151915191518821915
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)9 / 2.749 / 2.749 / 2.74 8.25 / 2.51 8.75 / 2.67
Engine Wheelbase (ft / m)23.25 / 7.0923.08 / 7.0323.08 / 7.0322.21 / 6.7723.25 / 7.09
Ratio of driving wheelbase to overall engine wheebase 0.39 0.39 0.39 0.37 0.38
Overall Wheelbase (engine & tender) (ft / m)49.08 / 14.9647.83 / 14.5848.50 / 14.7846.62 / 14.2148.25 / 14.71
Axle Loading (Maximum Weight per Axle) (lbs / kg)36,500 / 16,55633,100 / 15,01436,500 / 16,55629,500 / 13,38135,550 / 16,125
Weight on Drivers (lbs / kg)69,500 / 31,52563,600 / 28,84969,500 / 31,52556,000 / 25,40166,500 / 30,164
Engine Weight (lbs / kg)108,500 / 49,215101,000 / 45,813108,500 / 49,21590,000 / 40,823107,400 / 48,716
Tender Loaded Weight (lbs / kg)97,600 / 44,27182,600 / 37,467106,100 / 48,12682,600 / 37,46794,600 / 42,910
Total Engine and Tender Weight (lbs / kg)206,100 / 93,486183,600 / 83,280214,600 / 97,341172,600 / 78,290202,000 / 91,626
Tender Water Capacity (gals / ML)4200 / 15.913800 / 14.394500 / 17.053800 / 14.394200 / 15.91
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)11 / 108 / 7.3012 / 10.908 / 7.3010 / 9.10
Minimum weight of rail (calculated) (lb/yd / kg/m)58 / 2953 / 26.5058 / 2947 / 23.5055 / 27.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)64 / 162664 / 162668 / 172764 / 162663 / 1626
Boiler Pressure (psi / kPa)160 / 11155 / 10.70160 / 11150 / 10.30160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)18" x 24" / 457x61018" x 24" / 457x61018" x 24" / 457x61017" x 24" / 432x61018" x 24" / 457x610
Tractive Effort (lbs / kg)16,524 / 7495.1716,008 / 7261.1215,552 / 7054.2813,818 / 6267.7516,786 / 7614.01
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.21 3.97 4.47 4.05 3.96
Heating Ability
Firebox Area (sq ft / m2)110 / 10.22124 / 11.52110 / 10.22107 / 9.94110 / 10.22
Grate Area (sq ft / m2)17 / 1.5818 / 1.6717 / 1.5816 / 1.4917 / 1.58
Evaporative Heating Surface (sq ft / m2)1275 / 118.491299 / 120.721275 / 118.491027 / 95.451275 / 118.49
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1275 / 118.491299 / 120.721275 / 118.491027 / 95.451275 / 118.49
Evaporative Heating Surface/Cylinder Volume180.38183.77180.38162.89180.38
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation27202790272024002720
Same as above plus superheater percentage27202790272024002720
Same as above but substitute firebox area for grate area17,60019,22017,60016,05017,600
Power L144064489468239644338
Power MT279.53311.21297.04312.11287.63

Specifications by Steve Llanso of Sweat House Media
ClassD-16D-20D-20D-21D5
Locobase ID9786 9789 9790 9791 9777
RailroadBirmingham, Selma & New Orleans (L&N)Atlanta Knoxville & Northern (L&N)Louisville & Nashville (L&N)Louisville & Nashville (L&N)Louisville, Cincinnati & Lexington (L&N)
CountryUSAUSAUSAUSAUSA
Whyte4-4-04-4-04-4-04-4-04-4-0
Number in Class51124
Road Numbers134-136, 145-14620/141142355, 332/143-144940-943/10-13
GaugeStdStdStdStdStd
Number Built54
BuilderL&NAK&NL&NRogers
Year19051892192419061882
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)9 / 2.74 9.08 / 2.77 9.08 / 2.77 9.08 / 2.77 8.50 / 2.59
Engine Wheelbase (ft / m)23.08 / 7.0323.62 / 7.2023.25 / 7.0923.74 / 7.2422.41 / 6.83
Ratio of driving wheelbase to overall engine wheebase 0.39 0.38 0.39 0.38 0.38
Overall Wheelbase (engine & tender) (ft / m)48.08 / 14.6548.79 / 14.8749.17 / 14.9948.74 / 14.8647.08 / 14.35
Axle Loading (Maximum Weight per Axle) (lbs / kg)41,000 / 18,59734,600 / 15,69437,800 / 17,14636,400 / 16,51129,300 / 13,290
Weight on Drivers (lbs / kg)78,100 / 35,42669,000 / 31,29870,200 / 31,84271,450 / 32,40956,000 / 25,401
Engine Weight (lbs / kg)125,500 / 56,926110,000 / 49,895112,200 / 50,893113,850 / 51,64290,000 / 40,823
Tender Loaded Weight (lbs / kg)113,000 / 51,25698,500 / 44,679102,000 / 46,266113,000 / 51,25670,000 / 31,752
Total Engine and Tender Weight (lbs / kg)238,500 / 108,182208,500 / 94,574214,200 / 97,159226,850 / 102,898160,000 / 72,575
Tender Water Capacity (gals / ML)5000 / 18.944500 / 17.055000 / 18.945000 / 18.943000 / 11.36
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)10 / 9.108 / 7.3010 / 9.1010 / 9.107 / 6.40
Minimum weight of rail (calculated) (lb/yd / kg/m)65 / 32.5058 / 2959 / 29.5060 / 3047 / 23.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)67 / 170264 / 162664 / 162664 / 162664 / 1626
Boiler Pressure (psi / kPa)180 / 12.40155 / 10.70160 / 11155 / 10.70150 / 10.30
High Pressure Cylinders (dia x stroke) (in / mm)18.5" x 24" / 470x61018" x 24" / 457x61018" x 24" / 457x61018" x 24" / 457x61017" x 24" / 432x610
Tractive Effort (lbs / kg)18,757 / 8508.0416,008 / 7261.1216,524 / 7495.1716,008 / 7261.1213,818 / 6267.75
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.16 4.31 4.25 4.46 4.05
Heating Ability
Firebox Area (sq ft / m2)137 / 12.73129 / 11.99102 / 9.48129 / 11.99100 / 9.29
Grate Area (sq ft / m2)18 / 1.6719 / 1.7717 / 1.5819 / 1.7715.50 / 1.44
Evaporative Heating Surface (sq ft / m2)1710 / 158.921470 / 136.621278 / 118.771470 / 136.621068 / 99.26
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1710 / 158.921470 / 136.621278 / 118.771470 / 136.621068 / 99.26
Evaporative Heating Surface/Cylinder Volume229.02207.96180.80207.96169.39
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation32402945272029452325
Same as above plus superheater percentage32402945272029452325
Same as above but substitute firebox area for grate area24,66019,99516,32019,99515,000
Power L164474947431749473979
Power MT363.97316.12271.15305.28313.29

Reference