Originally Posted by
Hank
Goggles,
My Owners Manual recommends 20"/1950 RPM for low-speed loitering and flightseeing. But I don't like the way the plane handles there. I often run 2300 down low, and put the throttle wherever I need it airspeed-wise. Food runs to the next county are 23/2300; flightseeing can be anywhere from 16-20" & 2300.
Bill, my C holds 52 gallons, burns a pretty steady 9 gph [good for 5½ hours], and won't run LOP without lots of vibration. 201's do it nicely if your injectors are balanced, but carbs are difficult to get there even with slightly reduced throttle and partial carb heat. I probably average ~140 knots groundspeed, indicating around 140 mph at 6000-8000 msl.