Diesel Engine 4001 @ Thirlmere 2024 Festival of Steam


Thirlmere village was once again awakened to the enchanting sound of the steam whistle for the annual Thirlmere Festival of Steam! One of the featured engines stealing the show was Diesel Engine 4001 - The 40 class was a groundbreaking group of diesel locomotives constructed by Montreal Locomotive Works in Canada for the New South Wales Department of Railways in 1951/52. These locomotives were the very first mainline diesel electric engines to be built for the department, marking a significant advancement in railway technology. Based on the ALCO RSC-3 design, the 40 class featured unique modifications that set them apart from the standard American Locomotive Company models. These included specially angled cab sides and handrail placements on the car body, showcasing innovative engineering and design. Initially utilized for heavy freight services from Sydney to Broadmeadow, the 40 class locomotives later served on North Coast routes to Brisbane and Main South line services to Albury. Their distinctive grey undercoat was eventually replaced with a vibrant verdant green, and even a royal blue for the 1954 Royal Tour of Queen Elizabeth II. Despite their initial success, the 40 class locomotives faced challenges with electrical work and power output compared to newer models. As a result, they were gradually phased out of service starting in May 1968, with the final locomotive retired in December 1971. Some parts were even repurposed for the construction of the new 442 class locomotives, ensuring their legacy lived on in future railway innovations.

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