Texas & Pacific 2-10-2 "Santa Fe" Type Locomotives

Class G-1 (Locobase 5436)

Data from a table in January 1917 RME. Relatively small Santa Fe with high drivers that proved to be fast for the arrangement. They were equipped with a Gaines wall in the firebox and combustion chamber.

This sextet was followed by 38 quite similar engines over the next 3 years.

The series ran as follows:

G-1 500-505 Baldwin March 1916

G-1-A 506-513 Baldwin March-April 1917

G-1-B 514-525 Baldwin April 1919 Arch tubes contributed 46 sq ft to firebox heating surface

G-1-C 526-543 Alco-Brooks December 1919. Several of these were upgraded with thermic syphons in the 1930s; see Locobase 8510.

In the early 1920s, the railroad raised the working pressure in this class from 185 psi to 200 psi.

Class G-1-C - syphons (Locobase 8510)

Data from T&P 1 - 1950ca Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

The T & P thought enough of these Santa Fes to retain them for decades even after their acquisition of 2-10-4s to update a half-dozen of them with thermic syphons. The railway removed 16 fire tubes totalling 151 sq ft of heating surface as it installed 3 thermic syphons totalling 86 sq ft of more efficient heating surface.

So while many of the G-1s were retired in the 1930s, these carried on into the war years.

Specifications
Class	G-1	G-1-C - syphons
Locobase ID	5436	8510
Railroad	Texas & Pacific (T & P)	Texas & Pacific (T & P)
Whyte	2-10-2	2-10-2
Road Numbers	500-505	526-7, 532, 535-36
Gauge	Std	Std
Builder	various	Texas & Pacific
Year	1916	1933
Valve Gear	Southern	Walschaert
	Locomotive Length and Weight
Driver Wheelbase	21.83'	22.33'
Engine Wheelbase	39.08'	39.50'
Ratio of driving wheelbase to overall engine wheebase	0.56	0.57
Overall Wheelbase (engine & tender)	72.81'	77.19'
Axle Loading (Maximum Weight per Axle)	54400 lbs	58205 lbs
Weight on Drivers	265400 lbs	267500 lbs
Engine Weight	327800 lbs	332000 lbs
Tender Light Weight	182718 lbs	229000 lbs
Total Engine and Tender Weight	510518 lbs	561000 lbs
Tender Water Capacity	9500 gals	12000 gals
Tender Fuel Capacity (oil/coal)	3100 gals	4000 gals
Minimum weight per yard of rail on which locomotive could run	88 lb rail	89 lb rail
	Geometry Relating to Tractive Effort
Driver Diameter	63"	63"
Boiler Pressure	185 psi	200 psi
Cylinders (dia x stroke)	28" x 32"	28" x 32"
Tractive Effort	62620 lbs	67698 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort)	4.24	3.95
	Heating Ability
Firebox Area	319 sq. ft	342 sq. ft
Grate Area	70 sq. ft	70 sq. ft
Evaporative Heating Surface	3846	3727
Superheating Surface	886	886
Combined Heating Surface	4732	4613
Evaporative Heating Surface/Cylinder Volume	168.64	163.42
	Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation	12950	14000
Same as above plus superheater percentage	15540	16800
Same as above but substitute firebox area for grate area	70818	82080
Power L1	11426	12349
Power MT	474.57	508.88