Erie 2-10-2 "Santa Fe" Type Locomotives

Class R-1 (Locobase 382)

Data from Erie 4 - 1928 Loco Diagrams supplied in May 2005 by Allen Stanley from his extensive collection. The data given are for engines that had as part of the firebox heating surface 126 sq ft of thermic syphons and 20 sq ft of arch tubes. Another variant had no thermic syphons and 37 sq ft of arch tubes -- total firebox heating surface amounted to 358 sq ft and total heating surface came to 5,684 sq ft.

Large, powerful freight engines. The first, Baldwin-built (#4000) was the prototype with a 90-in diameter boiler. Later engines (built by Baldwin, Alco, and Lima) had minimum diameters of 96.25 in. Their rough riding qualities were problematical until revised counterbalancing smoothed the way. All of the Erie's 2-10-2s were renowned for their great power, whether as road engines or pushers.

Class R-2 (Locobase 383)

Data from table in May 1916 issue of Railway Mechanical Engineer (RME), supplemented by the Erie 7-1949-1 locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

30 R2s were built between 1915-1917. Said to have had better steaming qualities than the R1s, they had a higher superheat ratio, much shorter firetubes, better factor of adhesion (though not by much), and a larger grate. They had coned boilers, 16" piston valves, and outside radial valve gear.

Class R-3 (Locobase 384)

Data from Erie 4 - 1928 and 7-1949-1 Loco Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

25 USRA Heavy Santa Fe engines that proved the longest-lived of all Erie 2-10-2s, lasting until 1949-1952. A bit smaller than the earlier Erie 2-10-2s (down to the use of 14" piston valves rather than those of 16"), they were typical USRA designs in their balance and well-integrated components.

This entry shows the later configuration when the basic firebox had 28 sq ft of arch tubes and 106 sq ft of thermic syphons adding to the firebox heating surface.

Specifications
Class	R-1	R-2	R-3
Locobase ID	382	383	384
Railroad	Erie (ERR)	Erie (ERR)	Erie (ERR)
Whyte	2-10-2	2-10-2	2-10-2
Road Numbers	4000-4041	4100-4129	4200-4224
Gauge	Std	Std	Std
Builder	several	Alco-Schenectady	Alco-Brooks
Year	1915	1915	1919
Valve Gear		Baker	Southern
	Locomotive Length and Weight
Driver Wheelbase	22'	22.50'	22.33'
Engine Wheelbase	42.58'	40.25'	42.17'
Ratio of driving wheelbase to overall engine wheebase	0.52	0.56	0.53
Overall Wheelbase (engine & tender)	78.37'	71.79'	82.83'
Axle Loading (Maximum Weight per Axle)	69100 lbs	67700 lbs	60600 lbs
Weight on Drivers	342900 lbs	338000 lbs	293000 lbs
Engine Weight	429300 lbs	404000 lbs	380000 lbs
Tender Light Weight	199800 lbs	198000 lbs	206100 lbs
Total Engine and Tender Weight	629100 lbs	602000 lbs	586100 lbs
Tender Water Capacity	10000 gals	10000 gals	12000 gals
Tender Fuel Capacity (oil/coal)	24 tons	24 tons	20 tons
Minimum weight per yard of rail on which locomotive could run	114 lb rail	113 lb rail	98 lb rail
	Geometry Relating to Tractive Effort
Driver Diameter	63"	63"	63"
Boiler Pressure	200 psi	200 psi	200 psi
Cylinders (dia x stroke)	31" x 32"	31" x 32"	30" x 32"
Tractive Effort	82982 lbs	82982 lbs	77714 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort)	4.13	4.07	3.77
	Heating Ability
Firebox Area	467 sq. ft	341.50 sq. ft	533 sq. ft
Grate Area	88 sq. ft	94.80 sq. ft	88.20 sq. ft
Evaporative Heating Surface	5793	4958	5260
Superheating Surface	1389	1274	1230
Combined Heating Surface	7182	6232	6490
Evaporative Heating Surface/Cylinder Volume	207.23	177.36	200.92
	Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation	17600	18960	17640
Same as above plus superheater percentage	21120	22752	21168
Same as above but substitute firebox area for grate area	112080	81960	127920
Power L1	15497	13621	15237
Power MT	498.18	444.22	573.24