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Tim Olson
Joined: 25 Jan 2007
Posts: 2879
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 Posted: Tue Aug 25, 2009 5:45 am Post subject: Leaning for Climb, LOP ppt, and more |
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A quick note on leaning during climb.
As many of you know, when you takeoff at altitude, especially over
5,000' of altitude, you will need to lean to get the proper takeoff
power. A trick I learned a while back is that during climb, all the way
up, you can lean to about 1225 degrees EGT, and if you maintain that
temp your engine should be roughly leaned appropriately for climb. If
you go full rich and try to climb to 8,000-10,000', your EGT's will be
too low and you won't be making much power. In addition, I've worked
with one person who had a Carbon Monoxide issue, and when I asked what
the EGT's were, they sounded very low. By leaning out the engine a bit
and raising the EGT's, the CO problem went away. So leaning is very
important during cruise and climb.
I did update my LOP Write-up at
http://www.myrv10.com/N104CD/upgrades/20090822/index.html
to add some additional info near the bottom, including the above.
I also put in an "Advanced Pilot Seminar" on leaning link at the bottom,
and a link to a .pdf version of the ppt that Sheldon had.
One other quick note....
I did get a trip write-up done from my latest travels to Utah,
Oregon, and Idaho. Might be boring for you, but it was a
really interesting trip in some respects.
http://www.myrv10.com/N104CD/flights/20090819/index.html
--
Tim Olson - RV-10 N104CD
do not archive
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Kellym
Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ
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| Posted: Tue Aug 25, 2009 5:54 am Post subject: Leaning for Climb, LOP ppt, and more |
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APS generally recommends that you note whatever your sea-level EGT is
for takeoff, if possible, and use that value for leaning in the climb.
If not possible, they suggest 1250-1300 or 200 degrees rich of your
normal 75% cruise peak EGT. Like you, I prefer to stay between
1200-1250, but don't get excited if it goes to 1275 initially on an
adjustment. You don't need to obsess about precision, just keep it
ballparked with 50 degrees or so of your target.
Tim Olson wrote:
| Quote: |
A quick note on leaning during climb.
As many of you know, when you takeoff at altitude, especially over
5,000' of altitude, you will need to lean to get the proper takeoff
power. A trick I learned a while back is that during climb, all the way
up, you can lean to about 1225 degrees EGT, and if you maintain that
temp your engine should be roughly leaned appropriately for climb. If
you go full rich and try to climb to 8,000-10,000', your EGT's will be
too low and you won't be making much power. In addition, I've worked
with one person who had a Carbon Monoxide issue, and when I asked what
the EGT's were, they sounded very low. By leaning out the engine a bit
and raising the EGT's, the CO problem went away. So leaning is very
important during cruise and climb.
I did update my LOP Write-up at
http://www.myrv10.com/N104CD/upgrades/20090822/index.html
to add some additional info near the bottom, including the above.
I also put in an "Advanced Pilot Seminar" on leaning link at the bottom,
and a link to a .pdf version of the ppt that Sheldon had.
One other quick note....
I did get a trip write-up done from my latest travels to Utah,
Oregon, and Idaho. Might be boring for you, but it was a
really interesting trip in some respects.
http://www.myrv10.com/N104CD/flights/20090819/index.html
|
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
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_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD |
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pitts_pilot(at)bellsouth.
Guest
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| Posted: Tue Aug 25, 2009 6:55 am Post subject: Leaning for Climb, LOP ppt, and more |
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The only comment I can make is that a specific EGT number will almost
always (sometimes we get lucky) work different on different
installations. The biggest issue in climbing is to prevent cooking the
cylinders. Many 'big' engines use the rich fuel mixture as a cooling
aid, and again, installation makes a difference. I always lean ..... to
prevent lead buildup in the plugs ..... but CHT drives how much. Get
the engine up to operating temp, and then do a T&G and climb like you
want ..... and lean using CHTs and then note the EGTs to establish your
own number. The CHTs are slow to react to changes in power, so be careful.
Linn
Tim Olson wrote:
| Quote: |
A quick note on leaning during climb.
As many of you know, when you takeoff at altitude, especially over
5,000' of altitude, you will need to lean to get the proper takeoff
power. A trick I learned a while back is that during climb, all the way
up, you can lean to about 1225 degrees EGT, and if you maintain that
temp your engine should be roughly leaned appropriately for climb. If
you go full rich and try to climb to 8,000-10,000', your EGT's will be
too low and you won't be making much power. In addition, I've worked
with one person who had a Carbon Monoxide issue, and when I asked what
the EGT's were, they sounded very low. By leaning out the engine a bit
and raising the EGT's, the CO problem went away. So leaning is very
important during cruise and climb.
I did update my LOP Write-up at
http://www.myrv10.com/N104CD/upgrades/20090822/index.html
to add some additional info near the bottom, including the above.
I also put in an "Advanced Pilot Seminar" on leaning link at the bottom,
and a link to a .pdf version of the ppt that Sheldon had.
One other quick note....
I did get a trip write-up done from my latest travels to Utah,
Oregon, and Idaho. Might be boring for you, but it was a
really interesting trip in some respects.
http://www.myrv10.com/N104CD/flights/20090819/index.html
|
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
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dlm46007(at)cox.net
Guest
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| Posted: Tue Aug 25, 2009 7:21 am Post subject: Leaning for Climb, LOP ppt, and more |
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Ditto on leaning. When I had my turbonormalized 177RG; the guidance from the
STC was when climbing make sure that the EGTS are abour 1250F and about
1400F for cruise. For the 10 I use the 1250F number for Takeoffs at 5000+
MSL but lean of peak EGTs usually fall in the 1350F-1400F range, while CHTs
usually range from about 275F to 320F.
--
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
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jcumins(at)jcis.net
Guest
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| Posted: Tue Aug 25, 2009 11:38 am Post subject: Leaning for Climb, LOP ppt, and more |
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I do this every time I fly. Especially at take off at high alt airports it
works great. You will be amazed how much more power is available with this
leaning procedure.
The Saratoga sea level egt is right at 1300 so I use 1250 to 1300 for climb
egt.
John G. Cumins
President
JC'S Interactive Systems
2499 B1 Martin Rd
Fairfield Ca 94533
707-425-7100
707-425-7576 Fax
Your Total Technology Solution Provider
--
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billderou(at)yahoo.com
Guest
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| Posted: Wed Aug 26, 2009 8:46 am Post subject: Leaning for Climb, LOP ppt, and more |
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My average EGT during cruise is always 1450 to 1510. I can't believe my engine is running much different than other installations but I do believe the instrumentation is different.
My CHT's during the summer were 360-380 during cruise. Summer air in Prescott is 50degF at 8,000ft.
Quoting EGT numbers from one aircraft doesn't necessarily transfer to another.
Bill DeRouchey
N939SB
--- On Tue, 8/25/09, David McNeill <dlm46007(at)cox.net> wrote:
[quote]
From: David McNeill <dlm46007(at)cox.net>
Subject: RE: Leaning for Climb, LOP ppt, and more
To: rv10-list(at)matronics.com
Date: Tuesday, August 25, 2009, 8:21 AM
--> RV10-List message posted by: "David McNeill" <dlm46007(at)cox.net (dlm46007(at)cox.net)>
Ditto on leaning. When I had my turbonormalized 177RG; the guidance from the
STC was when climbing make sure that the EGTS are abour 1250F and about
1400F for cruise. For the 10 I use the 1250F number for Takeoffs at 5000+
MSL but lean of peak EGTs usually fall in the 1350F-1400F range, while CHTs
usually range from about 275F to 320F.
--
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
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pitts_pilot(at)bellsouth.
Guest
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| Posted: Wed Aug 26, 2009 11:40 am Post subject: Leaning for Climb, LOP ppt, and more |
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Bill DeRouchey wrote:
| Quote: | My average EGT during cruise is always 1450 to 1510. I can't believe my
engine is running much different than other installations but I do
believe the instrumentation is different.
My CHT's during the summer were 360-380 during cruise. Summer air in
Prescott is 50degF at 8,000ft.
Quoting EGT numbers from one aircraft doesn't necessarily transfer to
another.
So very true. The only way they would be close .... but never exact
|
... would be for the headers to be drilled in a fixture. Distance from
the cyl head and even the rotational axis can make a lot of difference.
Better to think of the EGT as a relative reading.
Linn
do not archive
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rebrunk42(at)gmail.com
Guest
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| Posted: Wed Aug 26, 2009 11:40 am Post subject: Leaning for Climb, LOP ppt, and more |
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i flew to and from san diego from corpus christi 8/20 and 8/24 and experienced higher egts over new mexico and arizona at 10500ft . egts got cooler as did oil temp on entering cal. robert do not archive
On Aug 26, 2009, at 11:40 AM, Bill DeRouchey wrote:
[quote]My average EGT during cruise is always 1450 to 1510. I can't believe my engine is running much different than other installations but I do believe the instrumentation is different.
My CHT's during the summer were 360-380 during cruise. Summer air in Prescott is 50degF at 8,000ft.
Quoting EGT numbers from one aircraft doesn't necessarily transfer to another.
Bill DeRouchey
N939SB
--- On Tue, 8/25/09, David McNeill <dlm46007(at)cox.net (dlm46007(at)cox.net)> wrote:
[quote]
From: David McNeill <dlm46007(at)cox.net (dlm46007(at)cox.net)>
Subject: RE: Leaning for Climb, LOP ppt, and more
To: rv10-list(at)matronics.com (rv10-list(at)matronics.com)
Date: Tuesday, August 25, 2009, 8:21 AM
--> RV10-List message posted by: "David McNeill" <dlm46007(at)cox.net (dlm46007(at)cox.net)>
Ditto on leaning. When I had my turbonormalized 177RG; the guidance from the
STC was when climbing make sure that the EGTS are abour 1250F and about
1400F for cruise. For the 10 I use the 1250F number for Takeoffs at 5000+
MSL but lean of peak EGTs usually fall in the 1350F-1400F range, while CHTs
usually range from about 275F to 320F.
--
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
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Kelly McMullen
Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ
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| Posted: Wed Aug 26, 2009 1:14 pm Post subject: Leaning for Climb, LOP ppt, and more |
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If that is your cruise, what is your peak? Is that at 65%, 75% or ???
Seems a little high to me.
On Wed, Aug 26, 2009 at 9:40 AM, Bill DeRouchey<billderou(at)yahoo.com> wrote:
[quote] My average EGT during cruise is always 1450 to 1510. I can't believe my
engine is running much different than other installations but I do believe
the instrumentation is different.
My CHT's during the summer were 360-380 during cruise. Summer air in
Prescott is 50degF at 8,000ft.
Quoting EGT numbers from one aircraft doesn't necessarily transfer to
another.
Bill DeRouchey
N939SB
--- On Tue, 8/25/09, David McNeill <dlm46007(at)cox.net> wrote:
From: David McNeill <dlm46007(at)cox.net>
Subject: RE: Leaning for Climb, LOP ppt, and more
To: rv10-list(at)matronics.com
Date: Tuesday, August 25, 2009, 8:21 AM
Ditto on leaning. When I had my turbonormalized 177RG; the guidance from the
STC was when climbing make sure that the EGTS are abour 1250F and about
1400F for cruise. For the 10 I use the 1250F number for Takeoffs at 5000+
MSL but lean of peak EGTs usually fall in the 1350F-1400F range, while CHTs
usually range from about 275F to 320F.
--
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
|
_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor
KCHD |
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