The last Great Western Railway Chief Mechanical Engineer Frederick William Hawksworth was born 10 February 1884 in Swindon, and he joined the GWR in 1898, aged 15, but did not become CME until he was 57, in 1941. Having been at the forefront of steam locomotive development under George Jackson Churchward, ideas at Swindon Works had somewhat stagnated under the later years of his successor C. B. Collett, whose reluctance to give up the CME’s post resulted in Hawksworth’s lateness in taking up this position. Hawksworth had been one of Churchward’s “Bright Young Men”, and was involved in Churchward’s designs: he worked on, for example, the general arrangement drawings for “The Great Bear”.
Hawksworth continued in the design tradition which he had been involved in throughout his career, but made some important improvements. In particular increased superheat started to be fitted to the larger classes under his regime, and the works started to make much more use of welded construction. Another prominent new concept was a tender with slab sides, using welded construction, giving a much smoother appearance than the traditional design with stepped sides and riveted plates. His first design to be built, from 1944, was the Modified Hall, a significant development of the Collett design with increased superheat and very different cylinder and frame construction.After the war there were four more new designs, mostly improvements of earlier types. The ‘County’ Class 4-6-0 was the last and most powerful GWR 2-cylinder 4-6-0, the culmination of a line that began with the ‘Saints’ 42 years before. The chassis was similar to the modified Hall, but the boilers were to a new design, larger in diameter than the Std 1 (Hall) boiler but smaller in diameter and appreciably shorter than the Castle boiler. This boiler used tooling which was available from LMS 8F 2-8-0 boilers which Swindon had built for the Railway Executive during World War II and was pressed to 280psi, higher pressure than any previous GWR boiler.
They used some of the names from the vanished Churchward County Class 4-4-0s. He also designed The taper boilered 9400 Class 0-6-0 pannier tank, which were similar to the 5700 class under the footplate but had a much larger boiler giving them more power and adhesive weight – and thus braking capacity. Only the first ten, built by the Swindon, appeared under the GWR. The last two designs were only seen in British Railways livery. Arguably his most radical design was the 1500 Class. This had the same boiler as the 9400 but an all new short wheelbase chassis with outside Walschaerts valve gear and no running plate, and made considerable use of welded construction. They were designed for easy maintenance by the trackside. The last Hawksworth design was a very light conventional 0-6-0 pannier tank, the 1600 Class. This was a modernisation of the 2021 Class. Hawksworth remained Chief Mechanical Engineer through the formation of the Western Region of British Railways in 1948, continuing to work on locomotive design until retiring at the end of 1949. He died in Swindon 27 years later in July 1976. His ashes are buried in St. Mark’s Church, adjacent to the former site of Swindon Works.