Canadian National 2-10-2 "Santa Fe" Type Locomotives

Class T-1-a (Locobase 4354)

Data from the 1953 Canadian National locomotive diagram supplied in May 2005 by Allen Stanley from his extensive collection.

Originally built for the Canadian Government Railway (CGR) as well as for the CN by Brooks and the Montreal Locomotive Works, these engines were relatively small Santa Fes. The first two batches, built in 1916 and 1918, were identical; the T-1-c had a smaller boiler - see Locobase 6649. Brooks works numbers for the T-1-a were 56581-56590 and Montreal's works numbers for the T-1-b were 58337-58346.

The 1953 diagram book doesn't make clear when, but at some point the CN wrought a significant upgrade to the boiler and grate; see Locobase 8108.

Like the rest of the CN's stud, these persisted into the 1950s, the last retiring in 1961.

Class T-1-a/b/c (Locobase 8108)

Data from the 1953 Canadian National locomotive diagram supplied in May 2005 by Allen Stanley from his extensive collection.

Originally built for the Canadian Government Railway (CGR) as well as for the CN by Brooks and the Montreal Locomotive Works, this design was significantly upgraded in the 1930s or later. At the same time, the T-1cs built later in the decade (Locobase 6649) were modified to the same design.

In that time the railway installed thermic syphons in the firebox, which, when added to the arch tubes already in place, significantly increased the firebox heating surface. Locomotives fitted with TBolt superheater headers had longer boiler tubes (17') than those with the through-bolt design, shown here as 16' 5".

Class T-1-c (Locobase 6649)

Data from the 1953 Canadian National locomotive diagram supplied in May 2005 by Allen Stanley from his extensive collection.

The first two batches of the CGR's Santa Fe collection were identical (See Locobase 4354). But when the railroad went back to MLW in 1920, the result was a slightly smaller boiler and the deletion of the rear sandbox on the boiler. Works # for the T-1-c were 61880-61904.

As with the T-1-a and -b, the CN significantly upgraded the boiler and firebox. Grate area shot up to 77.3 sq ft. Without syphons, the firebox area increased to 286 sq ft; adding syphons brought the total to 351 sq ft. In some instances, the boiler tube length dropped to 16 ft 5 inches.

Like the rest of the CN's stud, these persisted into the 1950s, the last retiring in 1961.

Class T-2a (Locobase 74)

Data from the 1953 Canadian National locomotive diagram supplied in May 2005 by Allen Stanley from his extensive collection and from the 1930 Locomotive Cyclopedia.

Firebox had combustion chamber, boiler had feedwater heater. The CLC's works # were 1759-1763

These engines retired in 1955-1957.

Class T-4-a (Locobase 4355)

Data from the 1953 Canadian National locomotive diagram supplied in May 2005 by Allen Stanley from his extensive collection.

Drury (1993) says these were the largest 2-cylinder locomotives in the British Empire when put in service, and they introduced the Vanderbilt tender to Canada. Also noteworthy is the choice of a smaller boiler than the T-2s, but a much higher boiler pressure. Even so, the factors (boiler, grate, and adhesion) stay nicely in an acceptable range.

Like the rest of the CN's stud, these persisted into the 1950s, the last retiring in 1961.

Specifications
Class	T-1-a	T-1-a/b/c	T-1-c	T-2a	T-4-a
Locobase ID	4354	8108	6649	74	4355
Railroad	Canadian National (CNR)	Canadian National (CNR)	Canadian National (CNR)	Canadian National (CNR)	Canadian National (CNR)
Whyte	2-10-2	2-10-2	2-10-2	2-10-2	2-10-2
Road Numbers	4000-4009	4000-4044	4020-4044	4100-4104	4300-4332
Gauge	Std	Std	Std	Std	Std
Builder	Alco	CNR	Montreal LW	Canadian Locomotive Co	Canadian Locomotive Co
Year	1916	1942	1920	1924	1929
Valve Gear	Walschaert	Walschaert	Walschaert	Walschaert	Baker
	Locomotive Length and Weight
Driver Wheelbase	20.50'	20.50'	20.50'	21.70'	20.50'
Engine Wheelbase	37.83'	37.83'	37.83'	42.20'	39.75'
Ratio of driving wheelbase to overall engine wheebase	0.54	0.54	0.54	0.51	0.52
Overall Wheelbase (engine & tender)	70.23'	70.23'	70.85'	80.77'	72.17'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers	256000 lbs	256000 lbs	257400 lbs	325040 lbs	254800 lbs
Engine Weight	320000 lbs	320000 lbs	318900 lbs	409240 lbs	347600 lbs
Tender Light Weight	192200 lbs	183200 lbs	198800 lbs	245800 lbs	211100 lbs
Total Engine and Tender Weight	512200 lbs	503200 lbs	517700 lbs	655040 lbs	558700 lbs
Tender Water Capacity	10800 gals	9000 gals	9000 gals	13200 gals	9500 gals
Tender Fuel Capacity (oil/coal)	18.7 tons	17.6 tons	17 tons	17.6 tons	15 tons
Minimum weight per yard of rail on which locomotive could run	85 lb rail	85 lb rail	86 lb rail	108 lb rail	85 lb rail
	Geometry Relating to Tractive Effort
Driver Diameter	57"	57"	57"	57"	57"
Boiler Pressure	200 psi	200 psi	200 psi	200 psi	275 psi
Cylinders (dia x stroke)	26" x 32"	26" x 32"	26" x 32"	29" x 32"	24" x 28"
Tractive Effort	64516 lbs	64516 lbs	64516 lbs	80264 lbs	66139 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort)	3.97	3.97	3.99	4.05	3.85
	Heating Ability
Firebox Area	245 sq. ft	351 sq. ft	245 sq. ft	356 sq. ft	347 sq. ft
Grate Area	66.70 sq. ft	77.30 sq. ft	66.70 sq. ft	80.30 sq. ft	66.77 sq. ft
Evaporative Heating Surface	3699	3350	3517	5534	3412
Superheating Surface	850	850	850	1558	1500
Combined Heating Surface	4549	4200	4367	7092	4912
Evaporative Heating Surface/Cylinder Volume	188.11	170.36	178.85	226.21	232.73
	Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation	13340	15460	13340	16060	18362
Same as above plus superheater percentage	15875	18552	16008	19272	23870
Same as above but substitute firebox area for grate area	58310	84240	58800	85440	124053
Power L1	12149	12324	11974	16571	33228
Power MT	523.12	530.66	512.78	561.97	1437.50