Paul Erickson:
What I used to fly years ago!
http://en.wikipedia.org/wik...Retractable and:
"The Cutlass featured a variable pitch, constant speed propeller and more powerful Lycoming O-360-F1A6 engine of 180 horsepower (130 kW). The 172RG sold for about USD$19,000 more than the standard 172 of the same year and produced an optimal cruise speed of 140 knots (260 km/h), compared to 122 knots (226 km/h) for the contemporary 160 horsepower (120 kW) version.
Between 1980 and 1984 1177 RGs were built, with a small number following before production ceased in 1985.