Evolution of Thomas the Tank: From LNER Class J50 to LBSCR E2

Thomas the Tank has undergone numerous changes in design, reflecting different locomotive types and eras of British railway history. This article delves into the various locomotive designs that have shaped Thomas over the years, starting with the original J50 tank engine.

LNER Class J50: The Original Thomas

The original Thomas was a push-along toy based on the LNER Class J50 tank engine, a design recreated for the 70th anniversary after the original was lost. These locomotives, originally known as the Great Northern Railway J23s, were built from 1913 to 1939. A total of 102 were produced, with 40 for the GNR from 1913-1922 and an additional 62 by LNER from 1924-1939. Their primary purpose was shunting and yard work. Known as "Submarines" due to their long tanks, they were all withdrawn between 1958 and 1965 and eventually scrapped. The J50s played a crucial role in shaping the early character of Thomas the Tank.

LMS Fowler 3F "Jinty": Thomas' Evolution

The second design for Thomas was based on the LMS Fowler 3F "Jinties," a model made in 1978 when the original Thomas was retired. The LMS Fowler 3F "Jinties" were a class of steam tank engines, with a wheel arrangement of 0–6–0T. Known for their capability to reach speeds of up to 60 mph (96.5606 km/h), 422 of these locomotives were built from 1924 to 1931. They were primarily used for shunting but only nine survived into preservation, with some undergoing restoration and operational work.

LBSCR E2 Class Tank Engine: Current Base for Thomas

Thomas's current design is based on the LBSCR (London Brighton and South Coast Railway) E2 class tank engine. Ten E2 tank engines were made for the LBSCR from 1913 to 1916, primarily used for heavier shunting and short-distance freight duties in the London area and on the south coast. Due to their coal consumption, they were not suitable for long-distance trips. Two were initially tried in passenger service with push-pull trains but were quickly abandoned. By the 1950s, the locomotives were trialed at Southampton for dock shunting and were found suitable for this purpose. Six of the E2s were retained until 1962 when they were replaced by British Rail class 07 diesel shunters. The E2s were withdrawn and scrapped between 1961 and 1963, with none surviving into preservation. The current design of Thomas reflects this final development in his locomotive lineage.

Conclusion

Over the years, Thomas the Tank has been based on several different locomotive designs, each influencing his character and role. From the J50 tank engine to the Jinty and the E2 class, Thomas has evolved to capture the essence of British railway history. As of now, he is based on the E2 tank engine, embodying the final evolution of his locomotive lineage.