wrote:
Hi all,
Can anyone tell me if there are reasons other than fuel conservation
for flying a warrior slower cross country? Our club advises the pilots
to fly cross-country at or below 2300 RPM. Is there a good reason not
to fly at 2400 or 2450 RPM? Thanks for any help you can give. (I'm
relatively new pilot who is learning quickly!)
38LPilot

Advice like this usually points to a lack of knowledge on the part
of the originator. RPM in itself will tell you nothing about power
output or fuel consumption. 2300 RPM might be a conservative 65% power
at low alttitudes, but what if you're at 10,500 ft. Do they really
want you to fly at around 45% power on cross country flights?

Check your power charts. They'll contain appropriate power settings
for different density altitudes. Usually for 75%, 65%, and 55%. Pick
the power setting that is most appropriate for you flight, THEN figure
out what RPM will be required for your density altitude.

On my plane 2350 can be 75% power near sea level. At around 8,500
it's 2650 rpm. Same power setting, very different rpm for different
altitudes.

John Galban=====N4BQ (PA28-180)