Gene Whitt is back on line

I would think that proper leaning should be part of the
first solo flight prep and certainly before any sol x-c.
With fuel costs at $40 an hours, saving fuel is a big
pay-back.


--
James H. Macklin
ATP,CFI,A&P

--
The people think the Constitution protects their rights;
But government sees it as an obstacle to be overcome.
some support
http://www.usdoj.gov/olc/secondamendment2.htm
See http://www.fija.org/ more about your rights and duties.


"rps" wrote in message
oups.com...
| 15 engine outs? That has to be a record!
|
| The closest I came to an engine out was a fuel starvation
situation
| when I was a student pilot many moons ago. For my long
solo X-country,
| I planned the flight carefully so that I would have more
than 60
| minutes of fuel upon returning. However, after the plane
was refueled
| upon my final landing at my starting point, the owner of
the plane (who
| also ran the flight school) informed me that I was close
to zero fuel.
| He knew because he refueled the plane to near full
capacity!
|
| We determined that this happened because I had not leaned
the engine,
| but used performance figures from the POH that required
proper leaning!
| My instructor (I was his first student after he received
his CFI
| ticket) had not yet trained me on leaning procedures...
|

Jim Macklin wrote:
I would think that proper leaning should be part of the
first solo flight prep and certainly before any sol x-c.
With fuel costs at $40 an hours, saving fuel is a big
pay-back.


Except if you operate out of a sea level airport you would not have much
call to lean when all you are doing are local flights to the practice
area and such. Several of the operations I know here actually ban
leaning below 5000 feet. It should be taught long before the cross
countries but it would not be ingrained in the habits of the students
since they would not be doing it often if at all.
John

seriously? banning leaning below 5000'? I guess they enjoy cleaning
lead fouled plugs then.

I can't fathom some blanket rule like that, they should be teaching
proper leaning techniques not banning the use of it.

Robert

John Theune wrote:
Jim Macklin wrote:

I would think that proper leaning should be part of the first solo
flight prep and certainly before any sol x-c. With fuel costs at $40
an hours, saving fuel is a big pay-back.


Except if you operate out of a sea level airport you would not have much
call to lean when all you are doing are local flights to the practice
area and such. Several of the operations I know here actually ban
leaning below 5000 feet. It should be taught long before the cross
countries but it would not be ingrained in the habits of the students
since they would not be doing it often if at all.
John

"Robert Chambers" wrote in message
om...
seriously? banning leaning below 5000'? I guess they enjoy cleaning lead
fouled plugs then.

You have to remember, though, that many pilots and even mechanics think lead
fouling is caused by leaning TOO MUCH, not too LITTLE.


I can't fathom some blanket rule like that, they should be teaching proper
leaning techniques not banning the use of it.

Standard procedures in many (most?) places says 50 or so ROP...about the
worst place you can run your engine.

Matt Barrow wrote:


Standard procedures in many (most?) places says 50 or so ROP...about the
worst place you can run your engine.


That's where I was taught to lean to. I think the reason was that it is
a safe place, whereas lean of peak has some advantages, but can get you
into trouble with detonation if you are not really careful.

Any suggestions?

Brad

At low cruise settings, lean to get roughness (miss-firing
of the leanest cylinder) and then richen to smooth. You
have to do it very gently, just pressure on the mixture or
you'll over-shoot the settings. That is with a carb. If
you have fuel injection, it will run smooth until it quits,
follow the tables for fuel flow from the manual or use the
EGT.

For take-off above 3,000-5,000 feet density, you should lean
to get the proper mixture and max power.


--
James H. Macklin
ATP,CFI,A&P

--
The people think the Constitution protects their rights;
But government sees it as an obstacle to be overcome.
some support
http://www.usdoj.gov/olc/secondamendment2.htm
See http://www.fija.org/ more about your rights and duties.


"bsalai" wrote in message
...
| Matt Barrow wrote:
|
|
| Standard procedures in many (most?) places says 50 or so
ROP...about the
| worst place you can run your engine.
|
|
| That's where I was taught to lean to. I think the reason
was that it is
| a safe place, whereas lean of peak has some advantages,
but can get you
| into trouble with detonation if you are not really
careful.
|
| Any suggestions?
|
| Brad

Bsalai,

Any suggestions?


Uhm, get educated! For starters, read John Deakin's columns on engine
management at www.avweb.com

--
Thomas Borchert (EDDH)

"bsalai" wrote in message
...
Matt Barrow wrote:


Standard procedures in many (most?) places says 50 or so ROP...about the
worst place you can run your engine.


That's where I was taught to lean to. I think the reason was that it is a
safe place,

Hardest on the engine is not waht I call safe.

whereas lean of peak has some advantages, but can get you into trouble
with detonation if you are not really careful.

No, you can't really...only if you lag going from ROP to LOP.


Any suggestions?


Here's a start.

http://www.avweb.com/news/columns/182132-1.html
May 27, 2001
Detonation Myths

We've all been taught about detonation in piston aircraft engines. It's what
occurs when combustion pressure and temperature get so high that the
fuel/air mixture to explodes violently instead of burning smoothly, and it
can destroy an engine in a matter of seconds. Right? Well, not exactly.

"bsalai" wrote in message
...
Matt Barrow wrote:


Standard procedures in many (most?) places says 50 or so ROP...about the
worst place you can run your engine.


That's where I was taught to lean to. I think the reason was that it is a
safe place, whereas lean of peak has some advantages, but can get you into
trouble with detonation if you are not really careful.

Any suggestions?

http://www.avweb.com/news/columns/182146-1.html (Series on the right side of
the page), also:

http://www.engineteststand.com/

Standard procedures in many (most?) places says 50 or so ROP...about the
worst place you can run your engine.

If it really =is= the worst place, how did the engine makers come to
reccomend it?

Jose
--
Money: what you need when you run out of brains.
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