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Freight Locomotive L.F. Loree, No. 1403, built in 1933.
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Freight Locomotive L.F. Loree, No. 1403, built in 1933 – a triple expansion, 500 lbs. Steam pressure, with four cylinders, one of each of its four corners, one of which uses steam at 500 lbs pressure, one at 290 lbs and two at 145 lbs. Delaware and Hudson Railroad Photo, CS Archives.

Delaware & Hudson L.F. Loree No. 1403 High-Pressure 4-8-0 Steam Locomotive

The L.F. Loree was the fourth and last experimental high-pressure steam locomotive built by the Delaware and Hudson Railroad and ALCo in 1933 at their Colonie Shops. The locomotive was named after Leonor F. Loree, the railroad's President and the man behind the experimental high-pressure steam project. All of the previous high-pressure units were 2-8-0s, but the Loree was a 4-8-0, and at the time also known as a Twelve Wheeler.

The railroad called the unit "the first four outside cylinder, triple expansion, non-articulated locomotive." The front and rear cylinders both connected to the main pair of driving wheels. The rear cylinders, however, were not paired but cross-compounded. "Steam is expanded in three stages, being used first in a high pressure cylinder under the right side of the cab (20x32), then in an intermediate cylinder under the left side of the cab (27½x32) and finally in two low pressure cylinders a thet front of the locomotive (33x32), from which it exhausts through the stack." The Loree was able to produce and maintain 500 lbs of steam pressure through a combination water-tube and fire-tube boiler.

Four cylinders, 2 at front 2 at rear, poppet valves, 63 inch drivers, a boiler pressure of 500 psi. and a high tractive effort of a total of 108,000 pounds maximum with all cylinders using fresh steam and the tender booster cut in, this unique locomotive was basically a low-speed freight engine.

The D&H eventually retired the idea of high-pressure steam and moved toward conventional high horsepower locomotives of the day.

See also:

High Pressure Steam Locomotives

Delaware & Hudson

Leonor F. Loree

Steam Locomotives