Central Vermont / Detroit & Toledo Shore Line 2-8-0 "Consolidation" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class 15 (Locobase 7865)

Data from D&TSL 12-1953 locomotive diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. See also DeGolyer, Vol 48, pp. 207+ and Vol 71, pp. 45+. Works numbers were 40541-40543 in September 1913 and 56030-56032 in January 1923.

Incorporated on the eve of the Twentieth Century (16 March 1899), this railroad comprised the Pleasant Bay Railway established a year earlier and the Toledo & Ottawa Beach. The D & TSL spent the steam era operating independently of its co-owners, the Grand Trunk and the Toledo, Peoria & Western (after 1923, the Nickel Plate. )

These Consolidations were relatively small, but clearly the right size for the D & TSL because they ordered three in 1913 and repeated the order almost 10 years later. All of the details were the same including the vanadium cast frames and provision of 400 Tate flexible staybolts in the breaking zone.

As the years went on and the firebox modified by adding 57 sq ft of thermic syphons to the 14 sq ft of arch tubes, they developed an impressive amount of direct heating surface warmed by a large grate. The piston valves measured 14" (356 mm) in diameter.

16 and 17 were scrapped in 1936 and 1939, respectively, but the other 4 operated until 1952.


Class M-2-a/M-8-a (Locobase 7099)

Data from CV 1957 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 30329-30337 in January 1905.

The largest class of Consolidations on this small railroad, this class had relatively small boilers for 2-8-0s built during that time. On the other hand, they put a relatively high adhesion weight on the rails and they had a generous percentage of direct heating surface. Schenectady built them as a batch of cross-compounds with 22 1/2" and 35" x 32" stroke cylinders.

In 1928, the CV sold the last four of this class -- 405-408 --to the Duluth, Winnipeg & Pacific of the Canadian National as their class M-8-a (1981-1984, later 2196-2199); they were retired in 1957.

By the time the CV had compiled the 1957 edition of their diagram book, two of the remaining five had been scrapped. The last three then operated as switchers and had bob-tailed tenders.


Class M-3-a (Locobase 7098)

Data from CV 1957 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

A modest stud of Consolidations on this small railroad, these stayed in service with the CV til the end of steam, while some of the engines in earlier classes were sold to the Canadian National. 451-454 were fitted with Coffin feedwater heaters.


Class N-4-h (Locobase 7101)

Data from CV 1957 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection.

Following the nine M-2s (Locobase 7099) , this class had taller drivers but were otherwise quite similar, particularly after they received superheaters. Not long after the refit, the entire class was sold to the Canadian National as their class N-4-h (2810-2819) in 1928. By that time, most had a "thru-bolt" superheater arrangement with the areas shown in the specs. (Compared to the Tbolt header, the "Thru-bolt" header provided a greater air space between the saturated and superheated sides of the superheater, which reduced the rapidity of heat transfer and allowed for expansion and contraction.)

Some had the arrangement shown in the M-2 entry, which had two more flues and 30 more tubes.

They served the CN into the 1950s, the first retiring in 1954, the last in 1961.


Class N-5-a (Locobase 7100)

Data from CV 1957 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. Works numbers were 65293-65308 in November 1923.

This most numerous of the CV's Consolidation classes was owned by the Canadian National (which had taken over the CV's parent Grand Trunk in the same year) and leased back to the CV.

They had a relatively large boiler for the later-period 2-8-0s supplied to North American railroads. As delivered, they had four arch tubes contributing 25.6 sq ft (2.4 sq m) to the direct heating surface. Sometime later, 461,-464-465, and 469 had their fireboxes rearranged with two of the arch tubes being deleted in favor of 65 sq ft (6.05 sq m) in two Nicholson thermic syphons. The total firebox heating surface now totalled 256 sq ft (23.8 sq m).

Specifications by Steve Llanso of Sweat House Media
Class15M-2-a/M-8-aM-3-aN-4-hN-5-a
Locobase ID7865 7099 7098 7101 7100
RailroadDetroit & Toledo Shore Line (CNR)Central Vermont (CNR)Central Vermont (CNR)Central Vermont (CNR)Central Vermont (CNR)
CountryUSAUSAUSAUSAUSA
Whyte2-8-02-8-02-8-02-8-02-8-0
Number in Class6961016
Road Numbers15-17, 18-20400-408450-455409-418460-475
GaugeStdStdStdStdStd
Number Built6961016
BuilderBaldwinAlco-SchenectadyAlco-SchenectadyAlco-SchenectadyAlco-Schenectady
Year19131905191619061923
Valve GearBakerSouthernWalschaertSouthernWalschaert
Locomotive Length and Weight
Driver Wheelbase17'17'17'17'17'
Engine Wheelbase25.75'25.50'25.83'25.75'25.83'
Ratio of driving wheelbase to overall engine wheebase 0.66 0.67 0.66 0.66 0.66
Overall Wheelbase (engine & tender)75.46'54.17'68.10'60.02'59.40'
Axle Loading (Maximum Weight per Axle)48200 lbs
Weight on Drivers189980 lbs172360 lbs189410 lbs181750 lbs204250 lbs
Engine Weight217470 lbs195360 lbs217730 lbs204280 lbs232750 lbs
Tender Light Weight146730 lbs140000 lbs145000 lbs160300 lbs171200 lbs
Total Engine and Tender Weight364200 lbs335360 lbs362730 lbs364580 lbs403950 lbs
Tender Water Capacity8000 gals6000 gals7500 gals6700 gals8300 gals
Tender Fuel Capacity (oil/coal)10 tons14 tons12 tons14 tons14.5 tons
Minimum weight of rail (calculated)79 lb/yard72 lb/yard79 lb/yard76 lb/yard85 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter63"57"57"63"57"
Boiler Pressure180 psi180 psi180 psi180 psi180 psi
Cylinders (dia x stroke)23" x 30"22.5" x 32"24" x 32"22" x 32"24" x 32"
Tractive Effort38541 lbs43484 lbs49475 lbs37614 lbs49475 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.93 3.96 3.83 4.83 4.13
Heating Ability
Firebox Area236 sq. ft177 sq. ft222 sq. ft177 sq. ft216 sq. ft
Grate Area50.60 sq. ft50.62 sq. ft53.40 sq. ft50.62 sq. ft53.40 sq. ft
Evaporative Heating Surface2398 sq. ft2282 sq. ft2764 sq. ft2011 sq. ft2758 sq. ft
Superheating Surface450 sq. ft477 sq. ft631 sq. ft456 sq. ft630 sq. ft
Combined Heating Surface2848 sq. ft2759 sq. ft3395 sq. ft2467 sq. ft3388 sq. ft
Evaporative Heating Surface/Cylinder Volume166.22154.96164.96142.84164.61
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation91089112961291129612
Same as above plus superheater percentage1056510661114381075211438
Same as above but substitute firebox area for grate area4927737276475523759546267
Power L199948663975093979704
Power MT463.90443.23453.94455.94418.97

Photos

Reference


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