Thanks, this helps! I'll try these out and then fine tune as
appropriate for my club's plane.

Interesting notes about temps and cowl flaps. As it turns out, I didn't
get to do my approaches yesterday in the Cutlass because it's in the
shop. Everyone has been noting how the oil temp has been at the very
high end of the green most of the time, and the pane pretty much needs
to be flown with the cowl flaps open, and they finally decided to do
something about it. Of course, I don't know what "something" is if this
airplane is just known to run hot.

So far they've changed the oil cooler and now have decided to change
the oil temp sensor, but no change.

The CHT, by the way, seems to stay quite comfortably in the green.

thanks,
dave j


Dan Luke wrote:
wrote:

Does anyone have a crib sheet for the various "gaits" of the 172RG. By
gaits I mean the various MP/RPM/configuration settings (and their
associated airspeeds) that you use in different regimes of flight;
cruise, cruise climb/descent, holding, approach outside the OM, inside
the OM, etc.

o Climb: Cowl flaps open. Full throttle throughout climb, reduce RPM to 2500
at 1,000' AGL.

o Cruise: 25" MAP or full throttle, 2500 RPM, mixture lean of peak if
possible. Keep cowl flaps open in any but very cold weather; top of Cessna
CHT green is way too hot.

o Cruise descent: 18" or 20" MAP (depending on how smooth the air is), pitch
for 500 FPM. Cowl flaps closed.

o Holding: 18" MAP, gear & flaps up.

o Initial instr. approach segments: 20" MAP, 2500 RPM.

o Final instr. approach segment (slow): Mixture rich, 17" MAP (no wind), prop
in fine pitch, gear down, 1/3 flaps.

o Final instr. approach segment (fast) Mixture rich, 19" MAP (no wind),
prop in fine pitch, no gear or flaps until 1/4 mile final, then extend gear
(don't forget!) and 1/3 flaps simultaneously, then rest of flaps below IAS
white arc.

o Landing:
-Mixture rich, 17" MAP, prop in fine pitch, 1/3 flaps & gear down at
midfield downwind.
-15" MAP abeam touchdown.
-2/3 flaps, 80 KIAS on base leg.
-Full flaps, 70 KIAS on final.
-Throttle idle, 65 KIAS over the numbers.

--
Dan
C-172RG at BFM