Fowler Challenger III is a continuous track amphibious launch tractor, which was specifically designed for the Royal National Lifeboat Institution (RNLI), to launch and recover carriage mounted lifeboats, from beach-launched lifeboat stations.

A total of 13 tractors were constructed over a seven-year period from 1953 to 1960. The tractor is a highly modified version of the standard 95 bhp Fowler Challenger III diesel crawler tractor, manufactured by John Fowler & Co. of Leeds.

A prototype was trialled successfully at in 1952

The tractor developed a draw-bar pull of 21,100 Lbs, through its six-speed gearbox, and was fitted with a specially designed winch, allowing it to exert a maximum pull of 38,500 Lbs. at its lowest speed. Extended gear and clutch levers were fitted, to assist the driver when submerged.

The tractor has been made completely watertight, with the engine compartment sealed with watertight panels and doors. The engine was designed to run for long periods without overheating. Circular brass rubber-seated valves were fitted to the air intake and discharge ports, to be closed when submerged. To prevent damage, an automatic stop device was also employed.

There were many requirements of the RNLI variant tractor: Able to tow a life-boat and carriage weighing up to 14 tons over various types of terrain, including soft sand and deep shingle. Able to pull the life-boat and carriage up gradients of 1 in 4 and to hold them by its brakes on these gradients. Able to haul life-boat and carriage to the water, which at low water may be several miles at some stations. Capable of operating continuously at full power, in water up to a depth of seven feet.

Fowler Challenger III fleet Op. No. Reg No. Built Station CommentsT561953 1953–1960 Featured in Meccano Magazine, April 1954.Location unknown. 1960–1962 Relief fleet 1962–1967 1967 Depot 1968 1968–1969 Depot 1969–1977 1977–1982 Relief fleet 1982 1982–1988 1988–1989 Stored ()T57NYE 3511953 1953–1964 For many years in the Tim Matthews collection at Tring, Hertfordshire, but sold in Cheffins auction in May 2026. 1964–1966 Relief fleet 1966–1968 1968–1970 1970–1972 1972–1974 Relief fleet 1974 1974–1976 1976–1978 Depot 1978–1983 1983–1985 DepotT58OJJ 3121953 1953–1965 Location unknown. 1965–1974 1974–1975 1975–1976 Depot HZR 780 1976–1989 T59OJJ 8661954 1954–1969 Location unknown. 1969–1971 Depot 1971–1976 1977–1985 T60OXO 3231954 1954–1962 Location unknown. 1963–1972 1972–1973 Depot 1973–1974 1974–1978 1978–1983 1983–1985 1985–1989 Relief fleetT61PLA 5611954 1954–1966 Restored, was offered for sale in 2022.In a private collection in Market Rasen, Lincolnshire. 1966–1967 Relief fleet 1967–1968 1968–1969 Relief fleet 1969–1975 1975–1984 1985–1988 1988–1989 Relief fleetT62PLA 6981954 1954–1965 On display in the Stephen Robson Collection at Chain Bridge Honey Farm, Berwick-upon-Tweed, Northumberland. 1965–1967 Relief fleet 1967–1976 1976–1978 1978–1980 1980–1981 Relief fleet 1981–1987 1987–1989 DepotT63PXF 1631954 1955–1963 In the John Myers Historic Vehicle Collection at Huddersfield, West Yorkshire. 1963–1965 Relief fleet 1965–1975 1975–1978 1979–1983 1984–1988 1988 DepotT64PXF 5751955 1955–1958 In the John Myers Historic Vehicle Collection at Huddersfield, West Yorkshire. 1958–1967 1968–1978 1978–1980 Relief fleet 1980–1982 1982–1984 Relief fleet 1984–1986 T65VYT 8781958 1958–1959 On display in the RNLI Heritage Collection at Chatham Historic Dockyard. 1959–1963 Relief fleet 1963–1970 1970 1970–1972 Relief fleet 1972–1973 1974–1985 1985–1990 Relief fleetT66XYP 4001959 1959–1969 In a private collection in Ravensden, Bedfordshire. 1969–1974 1975 1976–1986 1986–1989 DepotT67YLD 7921960 1960–1969 In a private collection in Redditch, Worcestershire, November 2024. 1969–1972 Relief fleet 1972–1974 1974–1979 1979–1982 Relief fleet 1982–1983 1983–1984 1984–1985 Relief fleet 1985–1987 1987–1989 DepotT68YUV 7421960 1960–1968 For many years in the Tim Matthews collection at Tring, Hertfordshire, but sold in Cheffins auction in May 2026, and now in private ownership in Exmouth. 1969–1974 1975–1978 1978–1982 1982–1984 1984–1987 Relief fleet 1987 1987–1989 Relief fleet

See also New Holland TC45 launch tractor Talus MB-764 launch tractor Talus MB-H launch tractor Talus MB-4H launch tractor Talus Atlantic 85 DO-DO launch carriage

References