"xerj" wrote in message
...
When a power setting table shows a "best economy" and "best power" setting
for a given power level (say 75%) using a given MP and RPM this is just a
starting point, right?

Once the MP and RPM has been set and the leaning done, the actual power
settings would be more like 78% for best power, and 73% for best economy,
wouldn't they? (%'s are just guesses, no science involved).

Depends on the table. However, generally speaking a power setting table
will indicate how to lean the engine for that power setting, and the actual
power is "exactly" what the table indicates. "Exactly" is in quotes
because, of course, it's unlikely one can get the exact combination of MP,
RPM, leaning, and other factors in operation. But you'll be pretty darn
close.

Assuming the table shows the desired leaning (and most do), you would not
adjust the indicated power setting for any other factor, not even leaning.
If it says you are getting 75% and you've leaned as indicated, then you're
getting 75% (more or less).

If you have a specific table in mind and would like to post the details,
then information based on that table in particular can be provided to you.
Otherwise, the general rule is that the table tells you the correct power
resulting from the power setting. No adjustments required or desired.

Pete