New Haven 2-10-2 "Santa Fe" Type Locomotives

Class L-1 (Locobase 81)

Data from NH 1962 Steam Locomotive Diagrams

Although counterbalancing problems (inherent in the Santa Fe wheel arrangement and driver size) limited speeds to 25 mph, these engines lasted through World War II because of their pulling power on the New Haven-Maybrook section.

Class L-1 - with 3 syphons (Locobase 8121)

Data from NH 1962 St Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

Locobase 81 lets us see the Santa Fes as they were when they were new. Locobase 8120 describes those retrofitted with security circulators.

By the time of the diagram, the New Haven had beefed up its Santa Fe's direct heating surface by adding 156 sq ft of thermic syphons. And the diagram makes great claims for the potency of syphons as water evaporators. Each square foot of tube is credited with making 9.29 lb/hour steam per hour. The larger flues come in at 10.44 lb/hour. But the syphons perform at 55 lb/hour/sq ft, the same as the firebox as a whole.

Class L-1 - with 4 circulators (Locobase 8120)

Data from NH 1962 St Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive collection.

Locobase 81 shows the original configuration of these low-drivered Santa Fes. The current entry details one of two upgrades applied to the class later in its career. "Security circulators" were T-shaped water tubes that extended into the firebox and added (in this case) 54 sq ft of heating surface to the firebox. See Locobase 8121 for the thermic-syphon variant.

Specifications
Class	L-1	L-1 - with 3 syphons	L-1 - with 4 circulators
Locobase ID	81	8121	8120
Railroad	New Haven	New Haven	New Haven
Whyte	2-10-2	2-10-2	2-10-2
Road Numbers	3200-3249	3200-3249	3200-3249
Gauge	Std	Std	Std
Builder	Alco	Alco	Alco
Year	1918	1928	1938
Valve Gear	Baker	Baker	Walschaert
	Locomotive Length and Weight
Driver Wheelbase	22.50'	22.50'	22.50'
Engine Wheelbase	40.60'	40.60'	40.60'
Ratio of driving wheelbase to overall engine wheebase	0.55	0.55	0.55
Overall Wheelbase (engine & tender)	74'	74.73'	74.73'
Axle Loading (Maximum Weight per Axle)	62120 lbs	62120 lbs	62120 lbs
Weight on Drivers	299210 lbs	299210 lbs	299210 lbs
Engine Weight	360735 lbs	360735 lbs	360730 lbs
Tender Light Weight	202000 lbs	202000 lbs	194000 lbs
Total Engine and Tender Weight	562735 lbs	562735 lbs	554730 lbs
Tender Water Capacity	11000 gals	11000 gals	10000 gals
Tender Fuel Capacity (oil/coal)	16 tons	16 tons	16 tons
Minimum weight per yard of rail on which locomotive could run	100 lb rail	100 lb rail	100 lb rail
	Geometry Relating to Tractive Effort
Driver Diameter	63"	63"	63"
Boiler Pressure	200 psi	200 psi	200 psi
Cylinders (dia x stroke)	30" x 32"	30" x 32"	30" x 32"
Tractive Effort	77714 lbs	77714 lbs	77714 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort)	3.85	3.85	3.85
	Heating Ability
Firebox Area	266 sq. ft	420 sq. ft	337 sq. ft
Grate Area	82.50 sq. ft	82 sq. ft	82 sq. ft
Evaporative Heating Surface	4729 sq. ft	4443 sq. ft	4697 sq. ft
Superheating Surface	1155 sq. ft	1115 sq. ft	1468 sq. ft
Combined Heating Surface	5884 sq. ft	5558 sq. ft	6165 sq. ft
Evaporative Heating Surface/Cylinder Volume	180.63	169.71	179.41
	Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation	16500	16400	16400
Same as above plus superheater percentage	19800	19680	19680
Same as above but substitute firebox area for grate area	63840	100800	80880
Power L1	13198	13298	15717
Power MT	486.22	489.91	579.02