Canadian Pacific 2-8-0 "Consolidation" Type Locomotives

Locobase doesn't know much about this Consolidation design - even the source of the data is somewhat of a mystery. But the data themselves contain at least one odd feature: the short stroke for a 2-8-0 in particular or a compound in general. Also, this engine was relatively small and light for a compound 2-8-0 - the smallest of that particular combination in Locobase.

Class 1621 (Locobase 5373)

Data from a table in the July 1906 American Engineer and Railroad Journal (AERJ).

This locomotive is similar enough to the M4 described in AERJ a year later, yet significantly different enought, to represent a prototype. Note the odd superheater flue diameter. Changing to a true Schmidt superheater installation that had fewer, but larger-diameter flues was probably the last step to series production. See Locobase 4516.

Class M4a-h (Locobase 4516)

Data from a table in the July 1907 American Engineer and Railroad Journal. Additional data from 1947 Canadian Pacific Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

Built over 6 years by Alco-Schenectady, Baldwin, Canadian Loco Works, Canadian Pacific shops, Montreal LW. As they were modified over time, some received 2 more flues, but otherwise the class was little changed except to increase overall weigth.

Retired over a long period of time from 1935-1961.

Class N2 (Locobase 4525)

http://www.kettlevalleyrail.org/locomotive.htm (23 July 1923) for areas, cylinder dimensions, confirmed by data from 1947 Canadian Pacific Locomotive Diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

Originally delivered as the N3 class (3800-3960) over a five-year period by Canada Foundry, Canadian Loco Works, Canadian Pacific, Montreal. Retired from 1954-1963.

In commenting on the challenge of firing the D10 4-6-0s, Bill Yeats, in his article My FIRST TRIP AS THE 'ENGINEER' on the West Coast Railway Association's website http://www.wcra.org/features/engineer.htm (3 Dec 2004), says of the N2 class: "I might add that the N2 class 36 and 37 hundred consolidation engines were even harder to fire because they had about the same sized boiler with the same shallow firebox but were supplying superheated steam to larger cylinders with a longer piston stroke."

Class SE 5 (Locobase 4083)

Reported in the 29 Nov 1901 Railroad Gazette. May be class M3b, which later had numbers 3350-3391 and came from Schenectady in 1901-1904. This class retired gradually over a 20-year period beginning in 1930.

Specifications
Class1621M4a-hN2SE 5
Locobase ID31535373451645254083
RailroadCanadian PacificCanadian PacificCanadian PacificCanadian PacificCanadian Pacific
Whyte2-8-02-8-02-8-02-8-02-8-0
Road Numbers67316213400-35653600-37601201
GaugeStdStdStdStdStd
BuilderMontreal LWAlco-SchenectadyseveralseveralAlco
Year18981904190419091901
Valve GearWalschaertWalschaertStephenson
Locomotive Length and Weight
Driver Wheelbase14.50'15.83'15.83'16.50'15.67'
Engine Wheelbase22.50'24.37'24.37'25.42'23.59'
Ratio of driving wheelbase to overall engine wheebase 0.64 0.65 0.65 0.65 0.66
Overall Wheelbase (engine & tender)49.54'53.35'53.35'55.97'51.67'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers126300 lbs164000 lbs178000 lbs216000 lbs140500 lbs
Engine Weight142650 lbs186525 lbs202000 lbs240000 lbs159500 lbs
Tender Light Weight125700 lbs127000 lbs139000 lbs114000 lbs
Total Engine and Tender Weight0312225 lbs329000 lbs379000 lbs273500 lbs
Tender Water Capacity3840 gals5000 gals6000 gals6000 gals5000 gals
Tender Fuel Capacity (oil/coal)12 tons12 tons12 tons10 tons
Minimum weight per yard of rail on which locomotive could run52.62 lb rail68.33 lb rail74.17 lb rail90 lb rail59 lb rail
Geometry Relating to Tractive Effort
Driver Diameter51"57"57"63"61"
Boiler Pressure200 psi200 psi200 psi190 psi200 psi
Cylinders (dia x stroke)20.25" x 26" (1)21" x 28"21" x 28"23" x 32"22" x 28" (1)
Low Pressure Cylinders (dia x stroke)32" x 26"" x "" x "" x "35" x 28"
Tractive Effort25377 lbs36827 lbs36827 lbs43395 lbs27072 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.98 4.45 4.83 4.98 5.19
Heating Ability
Firebox Area151 sq. ft166 sq. ft190 sq. ft191 sq. ft134.37 sq. ft
Grate Area32.70 sq. ft43.80 sq. ft43.70 sq. ft49.50 sq. ft43.64 sq. ft
Evaporative Heating Surface19962660238123162219
Superheating Surface340310602
Combined Heating Surface19963000269129182219
Evaporative Heating Surface/Cylinder Volume411.90236.98212.12150.51360.25
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation65408760874094058728
Same as above plus superheater percentage65409752.809746.8411345.318728
Same as above but substitute firebox area for grate area3020036962.6742377.5543776.8326874
Power L13864.7411087.2110361.0411264.993770
Power MT269.84596.17513.31459.91236.62

Photos

Reference

Credits

Introduction and specifications provided by Steve Llanso of Sweat House Media.

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