Hi Steve
The RS-1 s were used as Passenger engines when they were first delivered in 1949 along with the H-16-44s. Road freights were handled by the 1000 hp Alco S-2s and the lone Baldwin 1000hp switcher. The 600 hp Baldwins and Alco S-1s worked the yards and the float bridges plus industrial spurs in LIC.
The RS-1s generally handled trains with P54 equipment. Montauk trains were in the care of the K-4s until the arrival of the 2400 hp C Liners when the last K-4 went back to the PRR. The arrival of the RS-3s in 1955 allowed the retirement of G-5s used on the commuter runs such as the Oyster bay branch trains. I believe the RS-1s were used in passenger service up into the 60's when the Alco Centuries were delivered
An interesting fact about the RS-1s is that this class wore the most paint schemes on the LIRR. The were delivered in the PRR brunswick scheme but repainted into the Tichy colors when the PRR put the LIRR into bankruptcy for the last time in 1950. In 1955 they were repainted in to the Goodfellow colors grey car body with orange ends. The sweep scheme was adopted in 1963 or so and lasted into the MTA era when the engines were once again repainted , this time into the MTA blue and yellow. They were delivered with steam boilers for passenger use.
