Boston & Albany 2-10-2 "Santa Fe" Type Locomotives

Class Z-1 (Locobase 8109)

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

The origin of the data for this class reflect its bifurcated career. They began as USRA Light Santa Fes assigned to the drag freights on the B & A. Very soon after their introduction, however, the B & A made a particular effort to increase freight-train speeds and these engines proved ill-suited to such work. They went to the Big Four in 1926, the New York Central itself in 1927.

In 1928, the Canadian National bought the class. There they found a home and served their new owners until the end of steam. The first of the class retired in 1955, the last in 1961.

Specifications

Class Z-1

Locobase ID 8109

Railroad Boston & Albany (NYC)

Whyte 2-10-2

Road Numbers 1100-1109

Gauge Std

Builder Alco

Year 1919

Valve Gear Southern

Locomotive Length and Weight

Driver Wheelbase 21'

Engine Wheelbase 40.33'

Ratio of driving wheelbase to overall engine wheebase 0.52

Overall Wheelbase (engine & tender) 75.96'

Axle Loading (Maximum Weight per Axle)

Weight on Drivers 276000 lbs

Engine Weight 352000 lbs

Tender Light Weight 188300 lbs

Total Engine and Tender Weight 540300 lbs

Tender Water Capacity 11 gals

Tender Fuel Capacity (oil/coal) 17.6 tons

Minimum weight per yard of rail on which locomotive could run 92 lb rail

Geometry Relating to Tractive Effort

Driver Diameter 57"

Boiler Pressure 200 psi

Cylinders (dia x stroke) 27" x 32"

Tractive Effort 69575 lbs

Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.97

Heating Ability

Firebox Area 373 sq. ft

Grate Area 76.30 sq. ft

Evaporative Heating Surface 4666

Superheating Surface 1085

Combined Heating Surface 5751

Evaporative Heating Surface/Cylinder Volume 220.03

Computations Relating to Power Output (More Information)

Robert LeMassena's Power Computation 15260

Same as above plus superheater percentage 18312

Same as above but substitute firebox area for grate area 89520

Power L1 14601

Power MT 583.15

Specifications
Class	Z-1
Locobase ID	8109
Railroad	Boston & Albany (NYC)
Whyte	2-10-2
Road Numbers	1100-1109
Gauge	Std
Builder	Alco
Year	1919
Valve Gear	Southern
	Locomotive Length and Weight
Driver Wheelbase	21'
Engine Wheelbase	40.33'
Ratio of driving wheelbase to overall engine wheebase	0.52
Overall Wheelbase (engine & tender)	75.96'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers	276000 lbs
Engine Weight	352000 lbs
Tender Light Weight	188300 lbs
Total Engine and Tender Weight	540300 lbs
Tender Water Capacity	11 gals
Tender Fuel Capacity (oil/coal)	17.6 tons
Minimum weight per yard of rail on which locomotive could run	92 lb rail
	Geometry Relating to Tractive Effort
Driver Diameter	57"
Boiler Pressure	200 psi
Cylinders (dia x stroke)	27" x 32"
Tractive Effort	69575 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort)	3.97
	Heating Ability
Firebox Area	373 sq. ft
Grate Area	76.30 sq. ft
Evaporative Heating Surface	4666
Superheating Surface	1085
Combined Heating Surface	5751
Evaporative Heating Surface/Cylinder Volume	220.03
	Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation	15260
Same as above plus superheater percentage	18312
Same as above but substitute firebox area for grate area	89520
Power L1	14601
Power MT	583.15

Reference

The New York Central System
New York Central Historical Society
NYC Forum
Historic New York Central Steam Photos (Photos courtesy Yesteryear Depot)
Memories of New York Central Steam by Arnold Hass (D. Carelton Railbooks)
New York Central's Later Power 1910-1968 by Alvin F. Staufer and Edward L. May (Alvin F. Staufer)
Rails Along the Hudson by Thomas M. Crawford and Frederick A. Kramer (Quadrant Press)
Steam Power of the New York Central System: Vol 1, Modern Power 1915-1955 by Alvin F. Staufer (Alvin F. Staufer)
Thoroughbreds by Alvin F Staufer (Alvin F. Staufer)

Credits

Introduction and specifications provided by Steve Llanso of Sweat House Media.