Technically, the GO-300 on the Cessna 175 doesn't have a PSRU, it's just a geared engine, sorta. They modified a standard O-300 with a beefed up crank/cam gear set and put the prop hub on the cam gear.
Allen G. Wiesner 65 Franklin Street Ansonia, CT 06401-1240 203-732-0508 ----- Original Message ----- > That said, Continental DOES or DID make a version of the O-300 with a >geared PSRU, for certified aircraft - and it seemed that they did so >entirely for powerband reasons (to turn the engine at over 3K, while >turning the prop at the normal 2400-2600 seen in most certified >direct-drive designs...
