Wabash 4-4-0 "American" Locomotives in the USA

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Class Details by Steve Llanso of Sweat House Media

Class 657/D-30 (Locobase 12365)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 22, p. 160. (Thanks to Chris Hohl for his 9 September 2016 email noting the tender's coal capacity.) Works numbers were 16916-16918 in July 1899.

Baldwin's spec sheet shows clearly that these three locomotives were ordered as Vauclain compounds at the same time the other two in the class were produced as simple-expansion engines (Locbase 6917). Unlike the slide valves in the latter engines, the compound trio had two 11 1/2" (292 mm) valves, each serving the unequal pair of one HP, one LP cylinder.

These three would be converted to simple expansion engines soon after they entered service; see Locobase 6917.


Class D-28 (Locobase 6914)

Data from WAB 1907 and WAB 1 - 1917 Locomotive Diagram books supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

This sextet was a repeat of the D-26s that entered service a year before. The big difference was a 1" increase in cylinder diameter. Four of the D-29s had 63" drivers as shown while two had 69" drivers.


Class D22 - 63"" (Locobase 6910)

Data from WAB 1907 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

This large class of Eight-wheelers was built for the Wabash in two driver sizes; the other 18 69" engines are described in Locobase 6911. In both sizes, production extended over a decade and more.


Class D22 - 69"" (Locobase 6911)

Data from WAB 1907 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

This large class of Eight-wheelers was built by the Wabash itself in two driver sizes; the other 25 63" engines are described in Locobase 6910. The railroad produced the class over a long period of more than 10 years.


Class D26 (Locobase 6912)

Data from WAB 1907 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

While the Wabash was building its own large D-22 class (Locobase 6910-6911, it was buying this class from the outside. The principal difference was a slightly longer set of boiler tubes whose number had increased by 4.


Class D27 (Locobase 6913)

Data from WAB 1907 and WAB 1 - 1917 Locomotive Diagram books supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

This small set of Eight-wheelers was noticeably bigger than the D-22s and D-26s. The basic power dimensions remained the same, but boiler pressure increased and 70 additional tubes crowded the vessel.


Class D31 (Locobase 6918)

Data from WAB 1907 and WAB 1 - 1917 Locomotive Diagram books supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. After searching in vain for any record of Baldwin's involvement in this pair, Locobase considered that Gene Connelly's tentative ID of Wabash as the builder.

A year after Baldwin delivered the Wabash's 77" express Eight-wheelers (Locobase 12365), these two engines rolled out on 73" drivers, but designed with substantially different proportions. The sloping grate was much bigger, but the firebox was shallower because it now sat above the plane of the driving axles. The boiler was almost perfectly cylindrical, and contained 44 more tubes of slightly greater length.


Class F / D29 (Locobase 6915)

Data from WAB 1907 and WAB 1 - 1917 Locomotive Diagram books supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

As the Wabash wound down its production of the 17" x 24" D-22s, it began delivering an updated design with 18" cylinders, a larger boiler pressed to 175 psi, a smaller grate, but enough firebox area to put it near the top of contemporary US Eight-wheelers. Sometime later, 11 sq ft of arch tubes was added to the firebox heating surface, increasing it to 158 sq ft.


Class H / D30 - 73"" (Locobase 6916)

Data from WAB 1907 and WAB 1 - 1917 Locomotive Diagram books supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers 3130-3132 in August-September 1899.

These were the first Wabash Eight-wheelers that had express-engine drivers. The class was split into two groups; this one, with 73" drivers, and a set by Baldwin with 77" drivers (see Locobase 6917).

A later addition of 11 sq ft of arch tubes raised the firebox heating surface to 177 sq ft.


Class H/D30 - 77"" (Locobase 6917)

Data from DeGolyer, Volume 22, pp. 170+ and WAB 1 - 1929 Locomotive Diagram books supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Thanks to Chris Hohl for his 9 September 2016 email noting the original tender capacity.) Works numbers for the pair delivered with simple-expansion cylinders were 17262

17263 in December 1899.

Similar to the Rhode Island 73" engines described in Locobase 6916, these Eight-wheelers rolled on true express-engine drivers. The diagram for these Baldwins shows a surprisingly lean-looking locomotive whose outsized drivers are offset by a long, high-pitched boiler barrel. Three--657-659--were originally delivered as Vauclain compounds; see Locobase 12365. All originally trailed tenders carrying 10 tons of coal; later diagrams show a reduction to 8 tons.

As with the Rhode Island engines, the Wabash later added 11 sq ft (1.02 sq m) to the firebox heating surface and increased the area to the figure shown in the specs. Thicker tires increased driver diameter to 78" (1,981 mm).

655 was scrapped in December 1929, 656 and 658 in December 1931, 659 in September 1933, and 657 finished off the class in November 1935.

Specifications by Steve Llanso of Sweat House Media
Class657/D-30D-28D22 - 63""D22 - 69""D26
Locobase ID12,365 6914 6910 6911 6912
RailroadWabashWabashWabashWabashWabash
CountryUSAUSAUSAUSAUSA
Whyte4-4-04-4-04-4-04-4-04-4-0
Number in Class36251826
Road Numbers657-659262-2651314
GaugeStdStdStdStdStd
Number Built36251826
BuilderBurnham, Williams & CoRhode IslandWabashWabashRhode Island
Year18991880187918791879
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)9 / 2.74 8.50 / 2.59 8.67 / 2.64 8.67 / 2.64 8.50 / 2.59
Engine Wheelbase (ft / m)25.04 / 7.6323.39 / 7.1322.82 / 6.9622.82 / 6.9623.20 / 7.07
Ratio of driving wheelbase to overall engine wheebase 0.36 0.36 0.38 0.38 0.37
Overall Wheelbase (engine & tender) (ft / m)47.70 / 14.5446.29 / 14.1145.13 / 13.7645.13 / 13.7645.67 / 13.92
Axle Loading (Maximum Weight per Axle) (lbs / kg)29,550 / 13,40429,000 / 13,15429,000 / 13,15430,000 / 13,608
Weight on Drivers (lbs / kg)80,000 / 36,28757,250 / 25,96855,000 / 24,94855,000 / 24,94857,000 / 25,855
Engine Weight (lbs / kg)131,000 / 59,42191,900 / 41,68587,000 / 39,46387,000 / 39,46387,000 / 39,463
Tender Loaded Weight (lbs / kg)90,000 / 40,82396,300 / 43,68175,500 / 34,24675,500 / 34,24675,500 / 34,246
Total Engine and Tender Weight (lbs / kg)221,000 / 100,244188,200 / 85,366162,500 / 73,709162,500 / 73,709162,500 / 73,709
Tender Water Capacity (gals / ML)4500 / 17.05
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)10
Minimum weight of rail (calculated) (lb/yd / kg/m)67 / 33.5048 / 2446 / 2346 / 2348 / 24
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)77 / 198163 / 160063 / 160069 / 175369 / 1753
Boiler Pressure (psi / kPa)200 / 13.80150 / 10.30150 / 10.30150 / 10.30150 / 10.30
High Pressure Cylinders (dia x stroke) (in / mm)13" x 26" / 330x66018" x 24" / 457x61017" x 24" / 432x61017" x 24" / 432x61017" x 24" / 432x610
Low Pressure Cylinders (dia x stroke) (in / mm)22" x 26" / 559x660
Tractive Effort (lbs / kg)14,381 / 6523.1215,737 / 7138.1914,037 / 6367.0812,817 / 5813.7012,817 / 5813.70
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.56 3.64 3.92 4.29 4.45
Heating Ability
Firebox Area (sq ft / m2)160 / 14.87118 / 10.97131 / 12.17131 / 12.17118 / 10.97
Grate Area (sq ft / m2)18.10 / 1.6817 / 1.5817.30 / 1.6117.30 / 1.6117 / 1.58
Evaporative Heating Surface (sq ft / m2)1729 / 160.691222 / 113.571177 / 109.391177 / 109.391222 / 113.57
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1729 / 160.691222 / 113.571177 / 109.391177 / 109.391222 / 113.57
Evaporative Heating Surface/Cylinder Volume432.87172.88186.68186.68193.81
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation36202550259525952550
Same as above plus superheater percentage36202550259525952550
Same as above but substitute firebox area for grate area32,00017,70019,65019,65017,700
Power L156744037457650124957
Power MT312.73310.92366.85401.80383.45

Specifications by Steve Llanso of Sweat House Media
ClassD27D31F / D29H / D30 - 73""H/D30 - 77""
Locobase ID6913 6918 6915 6916 6917
RailroadWabashWabashWabashWabashWabash
CountryUSAUSAUSAUSAUSA
Whyte4-4-04-4-04-4-04-4-04-4-0
Number in Class422135
Road Numbers262-265255-256118652-654656-660
GaugeStdStdStdStdStd
Number Built422132
BuilderRhode IslandWabashWabashRhode IslandBurnham, Williams & Co
Year18941900189218991899
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 8.50 / 2.59 8.50 / 2.59 8.50 / 2.599 / 2.749 / 2.74
Engine Wheelbase (ft / m)22.83 / 6.9623.58 / 7.1924.31 / 7.4124.74 / 7.5424.74 / 7.54
Ratio of driving wheelbase to overall engine wheebase 0.37 0.36 0.35 0.36 0.36
Overall Wheelbase (engine & tender) (ft / m)45.21 / 13.7847.44 / 14.4647.44 / 14.46
Axle Loading (Maximum Weight per Axle) (lbs / kg)40,500 / 18,37130,442 / 13,80841,155 / 18,66841,155 / 18,668
Weight on Drivers (lbs / kg)61,000 / 27,66980,000 / 36,28760,800 / 27,57879,505 / 36,06379,505 / 36,063
Engine Weight (lbs / kg)98,000 / 44,452126,000 / 57,15398,121 / 44,507122,905 / 55,749122,905 / 55,749
Tender Loaded Weight (lbs / kg)69,000 / 31,29892,750 / 42,07176,225 / 34,57596,300 / 43,68196,300 / 43,681
Total Engine and Tender Weight (lbs / kg)167,000 / 75,750218,750 / 99,224174,346 / 79,082219,205 / 99,430219,205 / 99,430
Tender Water Capacity (gals / ML)5000 / 18.944500 / 17.054500 / 17.05
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)8 / 7.3010 / 9.108 / 7.30
Minimum weight of rail (calculated) (lb/yd / kg/m)51 / 25.5067 / 33.5051 / 25.5066 / 3366 / 33
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)69 / 175373 / 185469 / 175373 / 185477 / 1956
Boiler Pressure (psi / kPa)180 / 12.40190 / 13.10175 / 12.10185 / 12.80190 / 13.10
High Pressure Cylinders (dia x stroke) (in / mm)17" x 24" / 432x61019" x 26" / 483x66018" x 24" / 457x61018.5" x 26" / 470x66018.5" x 26" / 470x660
Tractive Effort (lbs / kg)15,380 / 6976.2620,765 / 9418.8616,763 / 7603.5819,168 / 8694.4718,664 / 8465.86
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.97 3.85 3.63 4.15 4.26
Heating Ability
Firebox Area (sq ft / m2)129 / 11.99162 / 15.06147 / 13.66165.90 / 15.42177 / 16.44
Grate Area (sq ft / m2)17.50 / 1.6334 / 3.1616.50 / 1.5318.12 / 1.6818.12 / 1.68
Evaporative Heating Surface (sq ft / m2)1589 / 147.682162 / 200.931362 / 126.581759 / 163.481769 / 164.34
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1589 / 147.682162 / 200.931362 / 126.581759 / 163.481769 / 164.34
Evaporative Heating Surface/Cylinder Volume252.02253.40192.68217.46218.69
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation31506460288833523443
Same as above plus superheater percentage31506460288833523443
Same as above but substitute firebox area for grate area23,22030,78025,72530,69233,630
Power L173348052597072038000
Power MT530.12443.79432.95399.47443.67

Reference