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

ClassQty.Road NumbersYear BuiltBuilder

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
Locobase ID218 9010
RailroadNew York, Ontario, & WesternNew York, Ontario, & Western
Number in Class1010
Road Numbers451-460401-410
Number Built1010
Valve GearBakerBaker
Locomotive Length and Weight
Driver Wheelbase (ft)1818
Engine Wheelbase (ft)4239.75
Ratio of driving wheelbase to overall engine wheebase 0.43 0.45
Overall Wheelbase (engine & tender) (ft)80.6078.46
Axle Loading (Maximum Weight per Axle) (lbs)59,90052,100
Weight on Drivers (lbs)239,500208,000
Engine Weight (lbs)360,000317,000
Tender Loaded Weight (lbs)239,900212,400
Total Engine and Tender Weight (lbs)599,900529,400
Tender Water Capacity (gals)12,50012,500
Tender Fuel Capacity (oil/coal) (gals/tons)2016
Minimum weight of rail (calculated) (lb/yd)10087
Geometry Relating to Tractive Effort
Driver Diameter (in)6969
Boiler Pressure (psi)225200
High Pressure Cylinders (dia x stroke) (in)27" x 30"27" x 28"
Tractive Effort (lbs)60,61850,290
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.95 4.14
Heating Ability
Firebox Area (sq ft)353292
Grate Area (sq ft)75.3067
Evaporative Heating Surface (sq ft)45553693
Superheating Surface (sq ft)19311014
Combined Heating Surface (sq ft)64864707
Evaporative Heating Surface/Cylinder Volume229.12199.03
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation16,94313,400
Same as above plus superheater percentage22,02516,348
Same as above but substitute firebox area for grate area103,25371,248
Power L130,84517,700
Power MT1135.72750.42



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