Lycoming's views on best economy settings

On Thu, 1 Jul 2004 10:45:43 -0700, "Tom Sixkiller"
wrote:

"Mike Rhodes" wrote in message
.. .

All of Deakin's articles: http://www.avweb.com/news/columns/182146-1.html

John

So I can ignore all the hysterics and lean to roughness, then enrichen
it to smoothness. And we all should do so in any piston engine, as
long as the power is markedly below 75%.


No...you can read the articles and try to LEARN something instead of
shooting your mouth off with your foot still in it.


I glanced at one page of Deakin and thought the writing entertaining,
& therefore also distracting. That was not intended as a critique of
his understanding, though there appears to be a bit of desparation in
that regard. Deakin's kind of wordy, especially if its expected to be
used as reference material -- like from this news group.

I think it unusual to be dissed for not reading something, and I got
that feeling even before the above. So I chose not to pour over the
material, which is not written as if it were intended to be used for
reference. If you have a specific page I'd be glad to check it out;
but not all of his articles. If I like that then I may read more, but
on my time.

Otherwise, quoting the header post by Mr. Scott, (and this is general
info as I know/knew it)...

Remember, when you are cruising at 60% power, you cannot hurt the
engine no matter where you set the mixture control. You can't burn
valves or cook the cylinderheads or cause detonation, it just isn't
producing enough power to do that.

Therefore I think I can assume (for I always have), that no 'red zone'
actually exists in cruise throttle, as was mentioned someplace else in
the thread.

My 2nd reply, which is stated on top of this post (leaning to
roughness), is therefore allowed, and without qualification, by the
'can't hurt engine at 60%'. The words "best economy" are in the title
of this thread.

Mr. Scott's polite reply (thank-you) to my lean-to-roughness said I
"may have leaned to a safe setting, maybe not." But this is in
conflict with his own statement above, for which he then gave no
explanation, except to suggest the engine analyzer. But if the engine
is below 75% power then what difference does it make what mixture is
in any particular cylinder? If I need economy I go to roughness. If
I need speed then I enrichen it to gain power. And I would expect
more wear-and-tear at the higher power of richer mixture settings --
_IF_ I get higher power at richer mixture and don't begin to waste
fuel. I can monitor my airspeed to see where an another optimum
mixture setting exists.

(Apologies for putting all my replies into this post, for my first,
semi-uneducated post. It was an honest question on my part.)

--Mike