Rolls-Royce RR300

The Rolls-Royce RR300 is a small turboshaft and turboprop engine developed for light helicopters and general aviation, rated at up to 300 shp (224 kW) at takeoff power. It is a rebadged and downrated variant of the Rolls-Royce Model 250-C20, pairing a scaled-down centrifugal compressor from the Model 250-C40/47 with a combustor and turbine similar to those of the C20, and it keeps the look and layout of the Model 250 family. The five-seat Robinson R66 uses it, where Robinson had first intended to use the standard Model 250-C20, and Scott's Bell 47GT-6 was announced with it in 2013. FAA type certification was achieved in February 2008. It is the second attempt at a lower-rated Model 250, coming twenty years after the 350 shp Allison Model 225 of 1987.