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.
See William D. Edson's roster in Railroad History Bulletin 175 for builder's numbers. The was produced in two batches: May 1922 (works #63254-63257) and October 1923 (64735-67470).
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 5 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 | ||
|---|---|---|
| Class | Y-2 | Ya |
| Locobase ID | 218 | 9010 |
| Railroad | New York, Ontario, & Western | New York, Ontario, & Western |
| 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 | |
| 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 per yard of rail on which locomotive could run | 99.79 lb rail | 86.67 lb rail |
| 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 | 3693 |
| Superheating Surface | 1931 | 1014 |
| Combined Heating Surface | 6486 | 4707 |
| Evaporative Heating Surface/Cylinder Volume | 229.12 | 199.03 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 16942.50 | 13400 |
| Same as above plus superheater percentage | 21986.59 | 16286.68 |
| Same as above but substitute firebox area for grate area | 103071.27 | 70980.75 |
| Power L1 | 30845.05 | 17699.62 |
| Power MT | 1135.73 | 750.40 |
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