New York, Ontario, & Western 4-8-2 "Mountain" Locomotives of the USA

The New York, Ontario & Western Railroad took delivery of four (road numbers 401 through 404) 4-8-2s from the American Locomotive Company in 1922. These locomotives were designated as Class Y and had 27 x 28 cylinders, 69" drivers, a 200 psi boiler pressure, a tractive effort of 50,300 lbs and each weighed 317,000 pounds.

Another six "Mountains" (road numbers 405 through 410) followed from ALCO in 1923. They were designated as Class Y-1 and were essentially duplicates of the four Class Ys.

In 1929, ten more 4-8-2s were delivered from ALCO that were designated as Class Y-2 and assigned road numbers 451 through 460. These locomotives had 27 x 30 cylinders, 69" drivers, a 225 psi boiler pressure, a tractive effort of 60,620 lbs and each weighed 360,000 pounds.

The original Mountains had short tenders. The photo of 403 below shows it with the tender of an ex X class 2-10-2 locomotive. The 2-10-2s were scrapped because they were hard to maintain and hard to run -- they required two firemen. Instead of getting rid of the 2-10-2 tenders, the mountain type inherited the X's tenders and the mountain tenders went to a number of W class 2-8-0 locomotives. The 2-8-0s were remodeled with air pumps and many other things and were called W-2 class locomotives.

There are no surviving NYO&W "Mountains".

Roster by Richard Duley

Class Qty. Road Numbers Year Built Builder
Y 4 401-404 1922 ALCO
Y-1 6 405-410 1923 ALCO
Y-2 10 451-460 1929 ALCO

Class Details by Steve Llanso of Sweat House Media

Class Y-2 (Locobase 218)

Data from 1930 Locomotive Cyclopedia tables. See William D. Edson's roster in Railroad History Bulletin 175 for builder's numbers. (Thanks to Chris Hohl for providing valve gear ID.) The class was built as a single batch from 67986-67995 in July 1929.)

These were the only new locomotives the NYO&W bought during its last few decades of operation. They were identical to the New York Central's L-2s and possessed a similar "superpower" boiler layout featuring the Type E superheater.

Five (452, 454-455, 459-460) were sold to the Bangor & Aroostook in June 1945 as class M-2, but they barely outlasted the five that were scrapped by the NYO&W in 1947-1948.

Class Y/Y-1 (Locobase 9010)

Data from NYO&W 1 - 1943 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Raildata collection. (Thanks to Chris Hohl for his 11 November 2012 email querying the proper class ID for these two batches.) Works numbers were 63254-63257 (four Y in May 1922) and 64735-67740 in October 1923.

Compared to other Mountains of the time, these were relatively small and light engines. Still they were modern power and equipped with a generous amount of superheater surface.

In June 1945, when the NYO & W was beginning to dieselize, it sold five of the class (401, 404, 406-407, and 409) to the Savannah & Atlanta as that railroad's 445-449. 410 was scrapped in February 1947 and the others went in April and August 1948.

Specifications by Steve Llanso of Sweat House Media
Class Y-2 Y/Y-1
Locobase ID 218 9010
Railroad New York, Ontario, & Western New York, Ontario, & Western
Country USA USA
Whyte 4-8-2 4-8-2
Road Numbers 451-460 401-410
Gauge Std Std
Builder Alco Alco-Schenectady
Year 1929 1922
Valve Gear Baker Baker
Locomotive Length and Weight
Driver Wheelbase 18' 18'
Engine Wheelbase 42' 39.75'
Ratio of driving wheelbase to overall engine wheebase 0.43 0.45
Overall Wheelbase (engine & tender) 80.60' 78.46'
Axle Loading (Maximum Weight per Axle) 59900 lbs 52100 lbs
Weight on Drivers 239500 lbs 208000 lbs
Engine Weight 360000 lbs 317000 lbs
Tender Light Weight 239900 lbs 212400 lbs
Total Engine and Tender Weight 599900 lbs 529400 lbs
Tender Water Capacity 12500 gals 12500 gals
Tender Fuel Capacity (oil/coal) 20 tons 16 tons
Minimum weight of rail (calculated) 100 lb/yard 87 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter 69" 69"
Boiler Pressure 225 psi 200 psi
Cylinders (dia x stroke) 27" x 30" 27" x 28"
Tractive Effort 60618 lbs 50290 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.95 4.14
Heating Ability
Firebox Area 353 sq. ft 292 sq. ft
Grate Area 75.30 sq. ft 67 sq. ft
Evaporative Heating Surface 4555 sq. ft 3693 sq. ft
Superheating Surface 1931 sq. ft 1014 sq. ft
Combined Heating Surface 6486 sq. ft 4707 sq. ft
Evaporative Heating Surface/Cylinder Volume 229.12 199.03
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation 16943 13400
Same as above plus superheater percentage 22025 16348
Same as above but substitute firebox area for grate area 103253 71248
Power L1 30845 17700
Power MT 1135.72 750.42



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