Today's Message Index:
----------------------
1. 06:07 AM - Re: Was : Re: Now Operating LOP (BobsV35B@aol.com)
2. 06:15 AM - Re: Was : Re: Now Operating LOP (KenWHyde@aol.com)
3. 06:49 AM - mixture technique (Dan Farmer)
4. 06:49 AM - Re: Was : Re: Now Operating LOP (BobsV35B@aol.com)
5. 07:42 AM - Re: Was : Re: Now Operating LOP (KenWHyde@aol.com)
6. 08:03 AM - Re: Was : Re: Now Operating LOP (craig kennedy)
Message 1
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| Subject: | Re: Now Operating LOP |
Good Morning Craig,
Just remember that 25 to 50 ROP EGT is just about e hottest place you can
run your engine.
If you are seeing heat related problems, it will be from running too close
to that hot spot. If you have poor distribution you want to run a LOT
richer to make sure the leanest cylinder is rich enough to avoid that hot spot.
If the distribution is perfect, you can run leaner than peak and run
cleaner and cooler Cleaner and cooler makes for a longer lived engine. Most
engine heat related damage comes from the engine running too lean at takeoff
and other high power regimes.
If you do not feel comfortable running lean, be sure you run rich enough to
avoid that hot spot located fifty degrees on the rich side. At any power
above 65 percent, fifty rich is the worst place you can operate.
Happy Skies,
Old Bob
In a message dated 4/22/2010 12:23:18 A.M. Central Daylight Time,
white_rhino_ps@yahoo.com writes:
Interesting information by everyone. While I have detailed info for my
IGO-540's, available by cylinder, for EGT, CHT, Fuel flow, and
servo/distributor flow rate, the left can run LOP but the right can't without
running
rough. Why? I have err'd on the side of caution by just running ROP by 25 to
50 degrees as the fuel is MUCH cheaper than 2 more $$$$$$$ overhauls.
Failures to date have been valve centric, but a surprising amount of heat
damage in the pins, head, and heads was also noted. I like the idea, but I'd
like to hit TBO and the big geared LYC's seem to dislike the method... I
don't have a dog in the hunt regarding the the proven LOP methodology, but
betting my money has proven to be more than I can afford!
Craig
Message 2
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| Subject: | Re: Now Operating LOP |
Know this is about the IGSO540 & IGO540 but what are the thoughts of LOP on
the narrow deck IO540's??
Thanks,
Ken
Message 3
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| Subject: | mixture technique |
Well it is good to see that the group has come to agreement on mixture tech
nique.- We all have one and yours sticks:-)))
-
dan farmer
6369U/500DF=0A=0A=0A
Message 4
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| Subject: | Re: Now Operating LOP |
Good Morning Ken,
The principles apply equally to all internal combustion engines from lawn
mower engines to Turbo Compound marvels.
The devil is in the details. If you have good fuel distribution whose fire
is lit efficiently, LOP works very well. If there are distribution or
ignition problems, an over rich mixture may allow suitable operations at the
expense of wasting fuel and running dirty.
The first order of business is always the same. Find out how good is the
fuel distribution and check as to how well the fire is lit.
Happy Skies,
Old Bob
In a message dated 4/22/2010 8:15:35 A.M. Central Daylight Time,
KenWHyde@aol.com writes:
Know this is about the IGSO540 & IGO540 but what are the thoughts of LOP
on the narrow deck IO540's??
Thanks,
Ken
Message 5
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| Subject: | Re: Now Operating LOP |
Thanks Bob,
I have the Gami's & JPI but have not had the time to really play with it
on the Commander. Spent few years on the 1049G, DC-7, DC-6's and it was
SOP. Went to the Lycoming school...they are not happy people about Gami or LOP.
Ken
In a message dated 4/22/2010 9:49:33 A.M. Eastern Daylight Time,
BobsV35B@aol.com writes:
Good Morning Ken,
The principles apply equally to all internal combustion engines from lawn
mower engines to Turbo Compound marvels.
The devil is in the details. If you have good fuel distribution whose fire
is lit efficiently, LOP works very well. If there are distribution or
ignition problems, an over rich mixture may allow suitable operations at the
expense of wasting fuel and running dirty.
The first order of business is always the same. Find out how good is the
fuel distribution and check as to how well the fire is lit.
Happy Skies,
Old Bob
In a message dated 4/22/2010 8:15:35 A.M. Central Daylight Time,
KenWHyde@aol.com writes:
Know this is about the IGSO540 & IGO540 but what are the thoughts of LOP
on the narrow deck IO540's??
Thanks,
Ken
(http://www.matronics.com/Navigator?Commander-List)
(http://www.matronics.com/contribution)
Message 6
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| Subject: | Re: Now Operating LOP |
Old Bob,
I lumped a few things together there. I don't operate any engine at that heat
point. This was what I found when I took the engines apart 2 years ago. I had
not operated them, but had just purchased the plane. The left failed 2.5 hours
into the ferry flight home. The right was in worse condition, just hadn't
failed yet. I won't go into the mythical pre-purchase inspection and extensive
annual allegedly performed which had not really been done. After rebuilding,
I added the multi-probe EGT/CHT, FF, etc., to let me know what was really happening.
We flow checked each nozzle to confirm. I run ROP now until I can
get the flows closer together. I'll keep the 50 degree ROP hotspot in mind!
Thanks for the help!
Craig
________________________________
From: "BobsV35B@aol.com" <BobsV35B@aol.com>
Sent: Thu, April 22, 2010 4:47:08 AM
Subject: Re: Was : Re: Commander-List: Now Operating LOP
Good Morning Craig,
Just remember that 25 to 50 ROP EGT is just about e hottest place you can
run your engine.
If you are seeing heat related problems, it will be from running too close
to that hot spot. If you have poor distribution you want to run a LOT richer to
make sure the leanest cylinder is rich enough to avoid that hot spot.
If the distribution is perfect, you can run leaner than peak and run
cleaner and cooler Cleaner and cooler makes for a longer lived
engine. Most engine heat related damage comes from the engine running too
lean at takeoff and other high power regimes.
If you do not feel comfortable running lean, be sure you run rich enough to
avoid that hot spot located fifty degrees on the rich side. At any power above
65 percent, fifty rich is the worst place you can operate.
Happy Skies,
Old Bob
In a message dated 4/22/2010 12:23:18 A.M. Central Daylight Time,
white_rhino_ps@yahoo.com writes:
Interesting information by everyone. While I have detailed info for
> my IGO-540's, available by cylinder, for EGT, CHT, Fuel flow, and
> servo/distributor flow rate, the left can run LOP but the right can't without
> running rough. Why? I have err'd on the side of caution by just
> running ROP by 25 to 50 degrees as the fuel is MUCH cheaper than 2 more
> $$$$$$$ overhauls. Failures to date have been valve centric, but a
> surprising amount of heat damage in the pins, head, and heads was also
> noted. I like the idea, but I'd like to hit TBO and the big geared LYC's
> seem to dislike the method... I don't have a dog in the hunt regarding
> the the proven LOP methodology, but betting my money has proven to be more
> than I can afford!
>
>Craig
>
>
>
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