The Rolls-Royce RB.53 Dart is a long-lived Britishturboprop engine designed, built and manufactured by Rolls-Royce Limited. First produced in the late 1940s, it powered the first Vickers Viscount maiden flight in 1948, and was still in production until the last F27s and H.S 748s were produced in 1987. Following the company convention for naming gas turbine engines after rivers, this turboprop design was named after the River Dart.
Largely associated with the very successful Vickers Viscount medium range airliner it powered a number of other European and Japanese designs of the 1950s and 60s and was also used to convert American-manufactured piston aircraft to turboprop power. The list includes:
Power output was around 1,500 hp (1,120 kW) in early versions, and close to twice that in later versions, such as those that powered the NAMC YS-11 airliner. Some versions of the engine were fitted with water methanol injection, which acted as a power restorative in hot and high conditions.