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".
|Class||Qty.||Road Numbers||Year Built||Builder|
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.
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|
|Railroad||New York, Ontario, & Western||New York, Ontario, & Western|
|Locomotive Length and Weight|
|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) on which locomotive could run||100 lb/yard||87 lb/yard|
|Geometry Relating to Tractive Effort|
|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|
|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|