Like the smaller LS & M engines 8 and 9 (Locobase 864), this pair kept its road numbers when the railroad became the St. Paul & Duluth in 1877.
1035 was sold in May 1901, 1036 in August 1901 to the Northern Pacific as part of the latter's takeover of the St P & D.
That the information comes from an Omaha Road diagram book indicates that these engines had a varied career. They were the first large class of locomotives delivered to the Northern Pacific and at the time of their arrival, they had drivers measuring 56 1/2" in diameter.
Four went almost immediately to the Chicago, Milwaukee & St Paul as 204-208 (works #2661, 2669, 2671, 2673) as did 5 others to unrecorded owners. Others were sold off in 1877 (to the Minneapolis & St Louis), and still others in 1880. Most of the rest were retired in the late 1890s or sold. The one that came to the Omaha Road in 1892 had received 63 1/2" drivers at some point and that is shown in the specifications.
Other than weighing slightly more and arriving 2 years later, the B-1 Eight-wheelers were duplicates of the Bs (Locobase 878) that had been produced in 1887. The W & CR evolved into the Washington Central in 1898 and was absorbed by the Northern Pacific in July 1907. 673 was scrapped in February 1924 while 672 lasted until March 1931.
309 was sold in April 1906 to the Pensacola, Alabama & Tennessee.
Locobase wonders if these might have been numbered 251-254 instead, because a list supplied by Allen Stanley
NB: The direct heating surface (including the firebox heating surface) is an estimate calculated by subtracting the calculated tube heating surface from the reported total evaporative heating surface.
Most served all of their time on the NP proper before being scrapped; this final event occurred over a decade and more from 1925 to 1940 with a few being retained through World War II. Some were sold to other, smaller Northwest or Minnesota railroads.
670 went first, being sold to the Canadian Northern in 1901
Minnesota & International bought 4 engines: 655 and 658 in July 1909, 6511 in January 1911, and 668 in June 1913. These were renumbered 21, 22, 19, and 20, respectively.
652 went to the Big Fork & International Falls in August 1911 and bore the number 1. The BF & IF was sold to the NP in January 1923.
670 may have ended up on the Cowlitz, Chehalis & Cascade in 1925, but Connelly's list indicates his uncertainty.
NB: The direct heating surface (including the firebox heating surface) is an estimate calculated by subtracting the calculated tube heating surface from the reported total evaporative heating surface.
NY Loco builder information from JF Webber's compilation as supplied by Allen Stanley in March 2004. This batch represented works #35-46 (February 1883). They were later renumbered 680-691.
R. V. Nixon talks about 684:
"The 684, [C]lass C-1, was built by the New York Locomotive Works and delivered to St. Paul the year the Northern Pacific was completed. It remained in main line passenger service for nearly 25 years and was then assigned to the Billings-Bridger passenger run. We who remember the bright red wheels, polished brass, clear-toned bell and peanut wagon whistle, can distinctly visualize the 684 starring in a Northern Pacific motion picture, along with the construction engine, Minnetonka."
Nixon adds that 684 was apparently to be dismantled in 1925, but instead was overhauled and sold to the Nez Perce & Idaho as their #4.
"For years," Nixon continued, "the 4 spot worked the 13 miles between Craigmont and Nez Perce, Idaho. Then the inevitable happened and she was laid aside in favor of more modern power. At the time of Nixon's account she seemed to be rusting away. "But even in her disgrace she's still a proud, high-stepping beauty," he said hopefully, "and waiting only for someone to come to her rescue."
817 was sold in 1899, but 818 lasted on the road until December 1922.
Manchester works #868-871.
Possibly the reason this was a single-engine class was the "Weston blr [boiler, Locobase believes]" mentioned in Connelly's notes.
NY Loco builder information from JF Webber's compilation as supplied by Allen Stanley in March 2004. This quartet bore Rome works #249-252 (April 1887) and seem to have been the first engines delivered to the MU. When the MU was taken over by the Northern Pacific, these engines were renumbered 675-678.
NB: The direct heating surface (including the firebox heating surface) is an estimate calculated by subtracting the calculated tube heating surface from the reported total evaporative heating surface.
Works numbers were
1879
April 4584, 4589, 4590, 4593; July 4726, 4732; September 4776, 4778
1880
May 5112-5113; June 5128, 5130, 5142-5143, 5163, 5165;July 5188, 5190; October 5308, 5310
1881
February 5522, 5524; June 5673-5674; July 5714-5715; August 5794; October 5842
5846-5849, 5851, 5880, 5883
1882
January 5997, 5999; March 6113, 6115, 6118; April 6125, 6149-6150, 6161-6162; July 6279-6281; December 6523-6525
At a later date, the Northern Pacific grouped several classes of light Eight-wheelers under the common class ID of C-2. A few were re-classified still later, presumably to take account of the differences in capability represented by smaller or larger boilers. This pair may have had the smallest boilers of the class because the tube count is certainly the lowest.
JF Webber's list of Dickson locomotives (conveyed to Locobase by Allen Stanley in March 2004) gives the works numbers as 605-610 (September-Ocotober 1897).
NB: The direct heating surface (including the firebox heating surface) is an estimate calculated by subtracting the calculated tube heating surface from the reported total evaporative heating surface.
NY Loco builder information from JF Webber's compilation as supplied by Allen Stanley in March 2004. This trio were works #350-352 (April 1888). When the St P & D was absorbed by the Northern Pacific, the latter railroad at first renumbered them in the 1000s, but later grouped them with the other 17"-cylinder 4-4-0s in the 600s.
Builder info from B.Rumary, 25 Kingscombe, Gurney Slade, Radstock, BA3 4TH, ENGLAND and Jeremy Lambert as supplied by Allen Stanley in March 2004. Works #1104-1107 in March 1886, 1194-1204 in March 1887.
The St Paul & Duluth appeared as a result of the reorganization of the Lake Superior and Mississippi in 1870. It was known throughout its history, both before and after the Northern Pacific's purchase in 1900, as the Skally Line.
The first two entered service on the LS & M with names: William L Banning and William R Marshall.
The LS & M collapsed in the Panic of 1873 and reorganized itself as the Saint Paul & Duluth in 1877. These two locomotives kept their numbers until the Saint Paul & Duluth was taken over by the NP. See Locobase 863 for the slightly more powerful pair that came to the LS & M shortly after these arrived.
These were produced at the same time as the Northern Pacific's A-1 class (Locobase 9298), but had slightly smaller boilers and slightly larger grates. When the LS & M failed to absorb the heavy shock of the 1873 Panic, it was sold to the St Paul & Duluth in 1877.
Only the 101 and 104 were taken into the Northern Pacific in 1901 as 1138-1139.
It wasn't very long after these locomotives were delivered to the LS & M when that railroad was thrown into financial convulsions by the Panic of 1873 and forced to reorganize. By 1877, the octet was relettered for the Saint Paul & Duluth, but retained its original road numbers. Later, the St P & D renumbered the class 28-34, having sold 112 to the W & SW.
In 1901, the Northern Pacific renumbered 5 of the class 1140-1144.
The 105, Connelly simply records, was "gone" (possibly as result of a wreck). 34 was sold to Standard Construction.
6563, 6565, 6571-6572 in January 1883; 6600, 6610 in February; 6636, 6646, 6650-6651, 6676-6677 in March; 6704, 6707-6708, 6724, 6726, 6729 in April; 6730, 6735, 6739, 6740-6741, 6743, 6769-6770, 6776-6777 in May; 6787, 6790-6791 in June , 6905 in August; 6913, 6920, 6942, 6948, 6967-6968 in September; and 6955-6956, 6972 in October.
The Puget Sound & South Shore Railroad locomotive produced in March 1890 was delivered to the Northern Pacific instead as their 740.
Most of the class operated on the Northern Pacific until they were scrapped after 20-30 years worth of service, but several were sold:
NP numbers Railroad or Company Year New number(s)
706 H T McLeary Lumber 191101
722 Louisville & Nashville 190511 51
Appalachicola Northern 1929 101 (2nd)
727 Louisville & Nashville 190511 57
730 Appalachicola Northern 1913 101 (1st)
732 Chehalis & Cowlitz 191305 1
(later Cowlitz, Chehalis & Cascade)
735 North Yakima & Valley 191004 2
(later returned, then sold to Inland Empire Paper 192301
736 Minnesota & International 190605 20
738 Appalachicola Northern 190512 102
739 Spokane & Inland Empire 190604 4
(later Spokane, Portland & Seattle 56)
740 North Yakima & Valley 191010 3
(later returned and scrapped)
Rhode Island delivered these four locomotives in drips and drabs, producing a pair -- works #1779-1780 -- in 1887, then 1820 and 1937 in 1888.
NB: The direct heating surface (including the firebox heating surface) is an estimate calculated by subtracting the calculated tube heating surface from the reported total evaporative heating surface.
These were slightly bigger locomotives than the 1-4 delivered in 1887-1888 (Locobase 882), but had fire tubes that measured a foot shorter. They were produced as a pair by Rhode Island and were that company's work #2085-2086.
NB: The direct heating surface (including the firebox heating surface) is an estimate calculated by subtracting the calculated tube heating surface from the reported total evaporative heating surface.
Baldwin delivered this engine in January 1880. It was sold to the Bellingham Bay & Southeastern in 1892 as their road number 1. The BB & SE discarded the locomotive in April 1904.
NB: The direct heating surface (including the firebox heating surface) is an estimate calculated by subtracting the calculated tube heating surface from the reported total evaporative heating surface.
Surprisingly low-drivered Eight-wheeler.
The railroad was built as the Vancouver, Klickitat and Yakima, but the effort broke the company and it was reorganized as the PV & Y in 1898. In 1903, the NP took over the PV & Y.
NB: The direct heating surface (including the firebox heating surface) is an estimate calculated by subtracting the calculated tube heating surface from the reported total evaporative heating surface.
NY Loco builder information from JF Webber's compilation as supplied by Allen Stanley in March 2004. This quintet had works #6-10 (July 1882). They were later renumbered 743-747 and three (744-746) went on to the Louisville & Nashville as that railroad's 52, 58, and 53, respectively.
The diagram shows "New Portland" as the builder, which presumably refers to the Portland Company of Portland, Maine. The 56 engines supplied to the NP -- works #463-518 -- represent a little less than 10% of all the locomotives (628) this company ever built. Portland also supplied 29 C-13 class 4-4-0 locomotives in 1881-1883 in a series of small batches, road numbers 172-183,189, 191, 194, and 203-222. later numbered 870-898. Little else seems to be known about this class.
builder information from B Rumary compilation as supplied by Allen Stanley in March 2004. Works number was 862.
| Specifications by Steve Llanso | |||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Class | 10 / C-26 | A-1 | B-1 | B-2 | B-2 | B-2 | B-2 / B | B-3 | C-1 | C-10 | C-12 | C-14 | C-19 | C-2 - 1883 | C-2 / C-11 | C-2 / C-4 | C-20 | C-21 | C-22 | C-23 | C-24 | C-25 | C-27 | C-28 | C-29 | C-3 | C-30 | C-31 | C-32 | C-33 | C-5 | C-6 | C-7 | C-8 | C-9 |
| Locobase ID | 863 | 9298 | 887 | 855 | 856 | 879 | 878 | 883 | 874 | 873 | 859 | 860 | 880 | 10801 | 876 | 871 | 881 | 885 | 877 | 870 | 869 | 867 | 864 | 865 | 866 | 875 | 882 | 886 | 861 | 862 | 872 | 8144 | 884 | 857 | 858 |
| Railroad | Lake Superior & Mississippi (NP) | Northern Pacific (NP) | Oregon & Washington Territory (NP) | Northern Pacific (NP) | Northern Pacific (NP) | Everett & Monte Cristo (NP) | Northern Pacific (NP) | Washington & Columbia River (NP) | Northern Pacific (NP) | Northern Pacific (NP) | Northern Pacific (NP) | Northern Pacific (NP) | Montana Union (NP) | Northern Pacific (NP) | Northern Pacific (NP) | Northern Pacific (NP) | St Paul & Duluth (NP) | St Paul & Duluth (NP) | St Paul & Duluth (NP) | St Paul & Duluth (NP) | St Paul & Duluth (NP) | Lake Superior & Mississippi (NP) | Lake Superior & Mississippi (NP) | Lake Superior & Mississippi (NP) | Lake Superior & Mississippi (NP) | Northern Pacific (NP) | Seattle & International (NP) | Seattle & International (NP) | Portland, Vancouver & Yakima (NP) | Portland, Vancouver & Yakima (NP) | Northern Pacific (NP) | Northern Pacific (NP) | Puget Sound (NP) | Northern Pacific (NP) | Northern Pacific (NP) |
| Whyte | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 | 4-4-0 |
| Road Numbers | 10-11 / 1135-1136 | 21-50 | 5-6 / 672-673 | 9-10, 70, 309-316 | 150-151 | 649 | 403-424 / 650-671 | 4-5 / 691-692 | 338-349 / 680-691 | 94 / 817-818 | 866-869 | 899 | 1-4 / 675-678 | 401-402 / 694-695 | 13 et seq / 819-865 | 100-101 / 741-742 | 54-59 / 635-37, 1127,113 | 67-69 / 1106-8 / 638-640 | 40-53 / 1109-1122 | 1123-1128 | 1129-1130 | 1-4 / 1131-1134 | 8- 9 / 1137, 1139 | 101-104 / 1138-1139 | 105-112 / 1140-1144 | 154-, 696-740 | 1-4 / 1145-1148 | 1149-1150 | 1151 | 1153 | 255-259 / 743-747 | 748-803 | 1 / 367 / 804 | 169-170 / 805-806 | 11-12, 303-305 / 807-816 |
| Gauge | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std | Std |
| Builder | M. Baird & Co | M. Baird & Co | Burnham, Parry, Williams & Co | Burnham, Parry, Williams & Co | Hinkley | Schenectady | Burnham, Parry, Williams & Co | Grant | New York (Rome) | Burnham, Parry, Williams & Co | Manchester | Burnham, Parry, Williams & Co | New York (Rome) | Burnham, Parry, Williams & Co | Burnham, Parry, Williams & Co | Burnham, Parry, Williams & Co | Dickson | New York (Rome) | Brooks | Rogers | McQueen (Schenectady) | Burnham, Parry, Williams & Co | M. Baird & Co | M. Baird & Co | Burnham, Parry, Williams & Co | Burnham, Parry, Williams & Co | Rhode Island | Rhode Island | Baldwin | New York (Rome) | Portland | Pittsburgh | Taunton | Pittsburgh | |
| Year | 1870 | 1872 | 1889 | 1871 | 1882 | 1887 | 1887 | 1888 | 1883 | 1882 | 1880 | 1881 | 1887 | 1883 | 1879 | 1882 | 1887 | 1888 | 1886 | 1881 | 1881 | 1868 | 1870 | 1871 | 1873 | 1882 | 1887 | 1888 | 1880 | 1882 | 1883 | 1888 | 1882 | 1882 | |
| Valve Gear | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson | Stephenson |
| Locomotive Length and Weight | |||||||||||||||||||||||||||||||||||
| Driver Wheelbase | 8' | 7.25' | 9' | 8' | 8.33' | 8.83' | 9' | 8.50' | 8.50' | 8' | 8' | 8' | 8.50' | 9.08' | 8' | 8' | 8.50' | 8.50' | 8.50' | 8.25' | 8.50' | 7.50' | 7.75' | 7.25' | 8' | 8.50' | 8.56' | 8.58' | 8' | 8' | 8.50' | 8.67' | 8.50' | 8.50' | |
| Engine Wheelbase | 21.67' | 20.83' | 23.75' | 21.77' | 24.62' | 23.73' | 23.33' | 23.29' | 22.58' | 22.48' | 22.58' | 23.62' | 23.87' | 22.54' | 22.50' | 23.08' | 22.58' | 23.42' | 22.33' | 22.83' | 22.17' | 21.33' | 21.08' | 21.67' | 23.29' | 22.52' | 22.46' | 21.75' | 22.71' | 23.04' | 22.67' | 22.42' | 22.46' | ||
| Ratio of driving wheelbase to overall engine wheebase | 0.37 | 0.35 | 0.38 | 0.37 | 0.36 | 0.38 | 0.36 | 0.36 | 0.35 | 0.36 | 0.35 | 0.36 | 0.38 | 0.35 | 0.36 | 0.37 | 0.38 | 0.36 | 0.37 | 0.37 | 0.34 | 0.36 | 0.34 | 0.37 | 0.36 | 0.38 | 0.38 | 0.37 | 0.35 | 0.37 | 0.38 | 0.38 | 0.38 | ||
| Overall Wheelbase (engine & tender) | 43.75' | 42.47' | 46.31' | 46.33' | 46.02' | 46.54' | 45.17' | 44.75' | 44.39' | 41.67' | 45.65' | 46.75' | 45.17' | 44.67' | 46' | 44.50' | 44.67' | 44.33' | 43' | 42.75' | 43' | 45.12' | 43.67' | 44.25' | 43.71' | 42.67' | 44.04' | 44.92' | 44.83' | 43.83' | 42.81' | ||||
| Axle Loading (Maximum Weight per Axle) | |||||||||||||||||||||||||||||||||||
| Weight on Drivers | 42800 lbs | 48500 lbs | 64700 lbs | 43150 lbs | 46100 lbs | 64000 lbs | 63900 lbs | 60100 lbs | 59250 lbs | 49900 lbs | 48700 lbs | 45350 lbs | 61000 lbs | 58750 lbs | 58750 lbs | 54000 lbs | 56950 lbs | 56400 lbs | 53500 lbs | 50400 lbs | 46200 lbs | 44300 lbs | 49000 lbs | 41000 lbs | 43750 lbs | 55500 lbs | 59000 lbs | 58400 lbs | 43500 lbs | 45800 lbs | 53650 lbs | 53000 lbs | 52500 lbs | 51600 lbs | 51400 lbs |
| Engine Weight | 69600 lbs | 76000 lbs | 101800 lbs | 68300 lbs | 73000 lbs | 100000 lbs | 100500 lbs | 94400 lbs | 90500 lbs | 79800 lbs | 78400 lbs | 74800 lbs | 94000 lbs | 91200 lbs | 91200 lbs | 80000 lbs | 86500 lbs | 90550 lbs | 85900 lbs | 79100 lbs | 74000 lbs | 74500 lbs | 62000 lbs | 63500 lbs | 70500 lbs | 88000 lbs | 94600 lbs | 92000 lbs | 70500 lbs | 64600 lbs | 84000 lbs | 84050 lbs | 85300 lbs | 80400 lbs | 81400 lbs |
| Tender Light Weight | 63400 lbs | 56800 lbs | 85970 lbs | 56130 lbs | 70300 lbs | 69640 lbs | 67070 lbs | 64618 lbs | 63270 lbs | 71102 lbs | 61400 lbs | 66000 lbs | 68750 lbs | 64000 lbs | 68100 lbs | 69400 lbs | 58000 lbs | 66400 lbs | 74000 lbs | 64800 lbs | 58000 lbs | 58000 lbs | 59100 lbs | 66260 lbs | 72200 lbs | 73000 lbs | 59000 lbs | 55000 lbs | 65618 lbs | 68092 lbs | 62300 lbs | 67031 lbs | 63040 lbs | ||
| Total Engine and Tender Weight | 133000 lbs | 132800 lbs | 187770 lbs | 124430 lbs | 170300 lbs | 170140 lbs | 161470 lbs | 155118 lbs | 143070 lbs | 149502 lbs | 136200 lbs | 160000 lbs | 159950 lbs | 144000 lbs | 154600 lbs | 159950 lbs | 143900 lbs | 145500 lbs | 148000 lbs | 139300 lbs | 120000 lbs | 121500 lbs | 129600 lbs | 154260 lbs | 166800 lbs | 165000 lbs | 129500 lbs | 119600 lbs | 149618 lbs | 152142 lbs | 147600 lbs | 147431 lbs | 144440 lbs | ||
| Tender Water Capacity | 2800 gals | 2700 gals | 3476 gals | 3000 gals | 3000 gals | 3000 gals | 4300 gals | 2820 gals | 2795 gals | 2890 gals | 2800 gals | 2800 gals | 2775 gals | 2775 gals | 2730 gals | 3000 gals | 3500 gals | 3000 gals | 3000 gals | 3000 gals | 2800 gals | 2000 gals | 2000 gals | 2000 gals | 2790 gals | 2850 gals | 2850 gals | 2735 gals | 2200 gals | 2820 gals | 2850 gals | 2790 gals | 2080 gals | 1960 gals | |
| Tender Fuel Capacity (oil/coal) | 7 tons | 4 tons | 7 tons | tons | 8 tons | 8 tons | 7 tons | 6.8 tons | 6 tons | 6 tons | 7 tons | 8 tons | 7 tons | 7 tons | 7 tons | 7 tons | 8 tons | 8 tons | 5 tons | 8 tons | 8 tons | 7 tons | 8 tons | 8 tons | 8 tons | 7 tons | 8 tons | 8 tons | 8 tons | 7 tons | 6 tons | 6.5 tons | 7 tons | 6 tons | 6 tons |
| Minimum weight of rail (calculated) on which locomotive could run | 36 lb/yard | 40 lb/yard | 54 lb/yard | 36 lb/yard | 38 lb/yard | 53 lb/yard | 53 lb/yard | 50 lb/yard | 49 lb/yard | 42 lb/yard | 41 lb/yard | 38 lb/yard | 51 lb/yard | 49 lb/yard | 49 lb/yard | 45 lb/yard | 47 lb/yard | 47 lb/yard | 45 lb/yard | 42 lb/yard | 39 lb/yard | 37 lb/yard | 41 lb/yard | 34 lb/yard | 36 lb/yard | 46 lb/yard | 49 lb/yard | 49 lb/yard | 36 lb/yard | 38 lb/yard | 45 lb/yard | 44 lb/yard | 44 lb/yard | 43 lb/yard | 43 lb/yard |
| Geometry Relating to Tractive Effort | |||||||||||||||||||||||||||||||||||
| Driver Diameter | 63" | 63.50" | 63" | 62" | 62" | 62" | 63" | 63" | 62" | 62" | 62" | 62" | 63" | 62" | 63" | 62" | 59" | 63" | 62" | 63" | 64" | 63" | 63" | 59" | 59" | 63" | 63" | 63" | 56" | 50" | 63" | 62" | 63" | 62" | 56" |
| Boiler Pressure | 135 psi | 140 psi | 150 psi | 140 psi | 140 psi | 140 psi | 150 psi | 140 psi | 140 psi | 140 psi | 140 psi | 140 psi | 140 psi | 150 psi | 150 psi | 140 psi | 145 psi | 145 psi | 140 psi | 145 psi | 145 psi | 135 psi | 135 psi | 135 psi | 135 psi | 140 psi | 150 psi | 150 psi | 140 psi | 120 psi | 140 psi | 140 psi | 140 psi | 140 psi | 140 psi |
| Cylinders (dia x stroke) | 16" x 24" | 15" x 24" | 18" x 24" | 16" x 24" | 16" x 24" | 18" x 26" | 18" x 24" | 18" x 23" | 17" x 24" | 17" x 24" | 17" x 24" | 17" x 24" | 17" x 24" | 17" x 24" | 17" x 24" | 17" x 24" | 17" x 24" | 17" x 24" | 17" x 24" | 17" x 24" | 17" x 24" | 16" x 24" | 15" x 22" | 15" x 24" | 16" x 24" | 17" x 24" | 17" x 24" | 17" x 24" | 16" x 24" | 15" x 24" | 17" x 24" | 18" x 24" | 17" x 24" | 17" x 24" | 15" x 22" |
| Tractive Effort | 11191 lbs | 10120 lbs | 15737 lbs | 11793 lbs | 11793 lbs | 16169 lbs | 15737 lbs | 14076 lbs | 13313 lbs | 13313 lbs | 13313 lbs | 13313 lbs | 13101 lbs | 14264 lbs | 14037 lbs | 13313 lbs | 14489 lbs | 13569 lbs | 13313 lbs | 13569 lbs | 13357 lbs | 11191 lbs | 9016 lbs | 10503 lbs | 11950 lbs | 13101 lbs | 14037 lbs | 14037 lbs | 13056 lbs | 11016 lbs | 13101 lbs | 14925 lbs | 13101 lbs | 13313 lbs | 10519 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.82 | 4.79 | 4.11 | 3.66 | 3.91 | 3.96 | 4.06 | 4.27 | 4.45 | 3.75 | 3.66 | 3.41 | 4.66 | 4.12 | 4.19 | 4.06 | 3.93 | 4.16 | 4.02 | 3.71 | 3.46 | 3.96 | 5.43 | 3.90 | 3.66 | 4.24 | 4.20 | 4.16 | 3.33 | 4.16 | 4.10 | 3.55 | 4.01 | 3.88 | 4.89 |
| Heating Ability | |||||||||||||||||||||||||||||||||||
| Firebox Area | 87 sq. ft | 131 sq. ft | 140 sq. ft | 123 sq. ft | 138 sq. ft | 122.50 sq. ft | 149 sq. ft | 117 sq. ft | 143 sq. ft | 155 sq. ft | 96 sq. ft | 130 sq. ft | |||||||||||||||||||||||
| Grate Area | 14.70 sq. ft | 13.30 sq. ft | 16.90 sq. ft | 17 sq. ft | 16.40 sq. ft | 17.20 sq. ft | 16.90 sq. ft | 17 sq. ft | 17 sq. ft | 15 sq. ft | 13.60 sq. ft | 15.30 sq. ft | 16.40 sq. ft | 26 sq. ft | 18.50 sq. ft | 32.60 sq. ft | 17 sq. ft | 17 sq. ft | 17 sq. ft | 16 sq. ft | 16.50 sq. ft | 14.60 sq. ft | 13.20 sq. ft | 13.80 sq. ft | 15.80 sq. ft | 16 sq. ft | 17.50 sq. ft | 17.75 sq. ft | 14.40 sq. ft | 15.25 sq. ft | 16.60 sq. ft | 16.50 sq. ft | 17 sq. ft | 13.60 sq. ft | 13.20 sq. ft |
| Evaporative Heating Surface | 903 sq. ft | 1601 sq. ft | 1449 sq. ft | 1590 sq. ft | 1542 sq. ft | 1348 sq. ft | 1360 sq. ft | 1364 sq. ft | 1295 sq. ft | 1241 sq. ft | 917 sq. ft | 758 sq. ft | |||||||||||||||||||||||
| Superheating Surface | |||||||||||||||||||||||||||||||||||
| Combined Heating Surface | 0 | 903 sq. ft | 1601 sq. ft | 0 | 0 | 1449 sq. ft | 1590 sq. ft | 1542 sq. ft | 0 | 0 | 0 | 0 | 1348 sq. ft | 0 | 0 | 0 | 1360 sq. ft | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1364 sq. ft | 1295 sq. ft | 1241 sq. ft | 917 sq. ft | 758 sq. ft | 0 | 0 | 0 | 0 | 0 |
| Evaporative Heating Surface/Cylinder Volume | 183.96 | 226.50 | 189.22 | 224.94 | 227.63 | 213.80 | 215.70 | 216.34 | 205.39 | 196.83 | 164.19 | 154.42 | |||||||||||||||||||||||
| Computations Relating to Power Output (More Information) | |||||||||||||||||||||||||||||||||||
| Robert LeMassena's Power Computation | 1985 | 1862 | 2535 | 2380 | 2296 | 2408 | 2535 | 2380 | 2380 | 2100 | 1904 | 2142 | 2296 | 3900 | 2775 | 4564 | 2465 | 2465 | 2380 | 2320 | 2393 | 1971 | 1782 | 1863 | 2133 | 2240 | 2625 | 2663 | 2016 | 1830 | 2324 | 2310 | 2380 | 1904 | 1848 |
| Same as above plus superheater percentage | 1985 | 1862 | 2535 | 2380 | 2296 | 2408 | 2535 | 2380 | 2380 | 2100 | 1904 | 2142 | 2296 | 3900 | 2775 | 4564 | 2465 | 2465 | 2380 | 2320 | 2393 | 1971 | 1782 | 1863 | 2133 | 2240 | 2625 | 2663 | 2016 | 1830 | 2324 | 2310 | 2380 | 1904 | 1848 |
| Same as above but substitute firebox area for grate area | 0 | 12180 | 19650 | 0 | 0 | 19600 | 18450 | 19320 | 0 | 0 | 0 | 0 | 17150 | 0 | 0 | 0 | 21605 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 16380 | 21450 | 23250 | 13440 | 15600 | 0 | 0 | 0 | 0 | 0 |
| Power L1 | 0 | 4039 | 5027 | 0 | 0 | 4060 | 4913 | 4844 | 0 | 0 | 0 | 0 | 4571 | 0 | 0 | 0 | 4760 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4544 | 5021 | 5036 | 3268 | 2868 | 0 | 0 | 0 | 0 | 0 |
| Power MT | 0 | 367.19 | 342.58 | 0 | 0 | 279.71 | 339.01 | 355.38 | 0 | 0 | 0 | 0 | 330.40 | 0 | 0 | 0 | 368.53 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 361.00 | 375.23 | 380.22 | 331.25 | 276.11 | 0 | 0 | 0 | 0 | 0 |