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Randy(at)abros.com
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 Posted: Tue Apr 25, 2006 2:06 pm Post subject: tunnel heat |
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Jesse, I am just fishing here. What exhaust system do you have? I have the AWI system with one muffler running crosswise under the engine and do not have a heating issue. Randy
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Jesse Saint
Sent: Tuesday, April 25, 2006 11:33 AM
To: rv10-list(at)matronics.com
Subject: RE: tunnel heat
I have a hard time believing that the scat tubes are causing the tunnel to get so hot. There is only heat going through them when the heater is on, and then the air is flowing through into the cabin, so the cabin is also heating up. Am I missing something?
I N256H we have not noticed any excessive heat in the tunnel and it has flown over 200 hours. We haven’t paid a lot of attention to it, but in that much airtime, I would think the issue would show up. We didn’t do anything special to insulate it.
Jesse Saint
I-TEC, Inc.
jesse(at)itecusa.org (jesse(at)itecusa.org)
www.itecusa.org
352-465-4545
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Tim Dawson-Townsend
Sent: Tuesday, April 25, 2006 9:29 AM
To: rv10-list(at)matronics.com
Subject: RE: tunnel heat
Michael, can you report a source for your insulated SCAT?
TDT
40025
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of RV Builder (Michael Sausen)
Sent: Tuesday, April 25, 2006 10:09 AM
To: rv10-list(at)matronics.com
Subject: RE: tunnel heat
This has been an ongoing problem, lot's of stuff in the archives about it. Not sure if anyone has really determined 100% what the cause is but there has been lot's of speculation and remediation techniques discussed. Some of the possible problems are:
-Air leakage through the heat boxes on the firewall
-Radiated heat via the firewall
-Radiated heat from the exhaust/engine cooling
-radiated heat from the SCAT tube running through the tunnel
I believe Tim used silicon baffle material as a thermal break when he attached the firewall cabin heat vent boxes which is probably a good idea. I used a ceramic paint additive and painted the inside of the firewall, tunnel, and floor. I also sprayed my acoustic material in the same areas which may add some additional insulating capacity (doubtful but anything helps). I may also use the standard firewall insulation but that stuff doesn't work very well unless you can keep it completely air sealed against the firewall. The last thing I am going to try to avoid this problem is to use insulated duct instead of regular SCAT. The stuff is hard to find, and a lot more expensive, but heat is a serious problem living in Texas (at least to someone from Wisconsin  ) and I really want to keep it controlled.
Michael Sausen
RV-10 #352 Working on Fuselage
Do Not Archive
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flysrv10(at)gmail.com
Guest
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| Posted: Tue Apr 25, 2006 3:46 pm Post subject: tunnel heat |
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I don't think that there is much room to accomodate another valve.
You will actaullay need two of them, one for the front duct and one
for the back.
Do not acrchive
On 4/25/06, Mike Lauritsen - Work <mike(at)cleavelandtool.com> wrote:
[quote]
I had been planning on a second valve as a "heat dump" so the firewall valve
is cold. After hearing this it sounds like this is an even better idea.
Really shutting off the heat has always been a problem in the -4. That
said, any of you that have the engine install done... is there room for
another T valve?
Mike Lauritsen
Cleaveland Aircraft Tool
2225 First St.
Boone, Iowa 50036
515-432-6794
mike(at)cleavelandtool.com
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flysrv10(at)gmail.com
Guest
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| Posted: Tue Apr 25, 2006 4:28 pm Post subject: tunnel heat |
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If you live in a cooler climate heat might not be an issue. Here, in
Florida, any small amount of heat will run you out of the cockpit.
Do not archive
On 4/25/06, Randy DeBauw <Randy(at)abros.com> wrote:
[quote]
Jesse, I am just fishing here. What exhaust system do you have? I have the
AWI system with one muffler running crosswise under the engine and do not
have a heating issue. Randy
________________________________
From: owner-rv10-list-server(at)matronics.com
[mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of
Jesse Saint
Sent: Tuesday, April 25, 2006 11:33 AM
To: rv10-list(at)matronics.com
Subject: RE: tunnel heat
I have a hard time believing that the scat tubes are causing the tunnel to
get so hot. There is only heat going through them when the heater is on,
and then the air is flowing through into the cabin, so the cabin is also
heating up. Am I missing something?
I N256H we have not noticed any excessive heat in the tunnel and it has
flown over 200 hours. We haven't paid a lot of attention to it, but in that
much airtime, I would think the issue would show up. We didn't do anything
special to insulate it.
Jesse Saint
I-TEC, Inc.
jesse(at)itecusa.org
www.itecusa.org
352-465-4545
________________________________
From: owner-rv10-list-server(at)matronics.com
[mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of
Tim Dawson-Townsend
Sent: Tuesday, April 25, 2006 9:29 AM
To: rv10-list(at)matronics.com
Subject: RE: tunnel heat
Michael, can you report a source for your insulated SCAT?
TDT
40025
________________________________
From: owner-rv10-list-server(at)matronics.com
[mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of
RV Builder (Michael Sausen)
Sent: Tuesday, April 25, 2006 10:09 AM
To: rv10-list(at)matronics.com
Subject: RE: tunnel heat
This has been an ongoing problem, lot's of stuff in the archives about it.
Not sure if anyone has really determined 100% what the cause is but there
has been lot's of speculation and remediation techniques discussed. Some of
the possible problems are:
-Air leakage through the heat boxes on the firewall
-Radiated heat via the firewall
-Radiated heat from the exhaust/engine cooling
-radiated heat from the SCAT tube running through the tunnel
I believe Tim used silicon baffle material as a thermal break when he
attached the firewall cabin heat vent boxes which is probably a good idea.
I used a ceramic paint additive and painted the inside of the firewall,
tunnel, and floor. I also sprayed my acoustic material in the same areas
which may add some additional insulating capacity (doubtful but anything
helps). I may also use the standard firewall insulation but that stuff
doesn't work very well unless you can keep it completely air sealed against
the firewall. The last thing I am going to try to avoid this problem is to
use insulated duct instead of regular SCAT. The stuff is hard to find, and
a lot more expensive, but heat is a serious problem living in Texas (at
least to someone from Wisconsin ) and I really want to keep it
controlled.
Michael Sausen
RV-10 #352 Working on Fuselage
Do Not Archive
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| | - 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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jesse(at)itecusa.org
Guest
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| Posted: Tue Apr 25, 2006 4:41 pm Post subject: tunnel heat |
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We have the dual muffler setup.
Jesse Saint
I-TEC, Inc.
jesse(at)itecusa.org (jesse(at)itecusa.org)
www.itecusa.org
352-465-4545
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Randy DeBauw
Sent: Tuesday, April 25, 2006 5:03 PM
To: rv10-list(at)matronics.com
Subject: RE: tunnel heat
Jesse, I am just fishing here. What exhaust system do you have? I have the AWI system with one muffler running crosswise under the engine and do not have a heating issue. Randy
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Jesse Saint
Sent: Tuesday, April 25, 2006 11:33 AM
To: rv10-list(at)matronics.com
Subject: RE: tunnel heat
I have a hard time believing that the scat tubes are causing the tunnel to get so hot. There is only heat going through them when the heater is on, and then the air is flowing through into the cabin, so the cabin is also heating up. Am I missing something?
I N256H we have not noticed any excessive heat in the tunnel and it has flown over 200 hours. We haven’t paid a lot of attention to it, but in that much airtime, I would think the issue would show up. We didn’t do anything special to insulate it.
Jesse Saint
I-TEC, Inc.
jesse(at)itecusa.org (jesse(at)itecusa.org)
www.itecusa.org
352-465-4545
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Tim Dawson-Townsend
Sent: Tuesday, April 25, 2006 9:29 AM
To: rv10-list(at)matronics.com
Subject: RE: tunnel heat
Michael, can you report a source for your insulated SCAT?
TDT
40025
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of RV Builder (Michael Sausen)
Sent: Tuesday, April 25, 2006 10:09 AM
To: rv10-list(at)matronics.com
Subject: RE: tunnel heat
This has been an ongoing problem, lot's of stuff in the archives about it. Not sure if anyone has really determined 100% what the cause is but there has been lot's of speculation and remediation techniques discussed. Some of the possible problems are:
-Air leakage through the heat boxes on the firewall
-Radiated heat via the firewall
-Radiated heat from the exhaust/engine cooling
-radiated heat from the SCAT tube running through the tunnel
I believe Tim used silicon baffle material as a thermal break when he attached the firewall cabin heat vent boxes which is probably a good idea. I used a ceramic paint additive and painted the inside of the firewall, tunnel, and floor. I also sprayed my acoustic material in the same areas which may add some additional insulating capacity (doubtful but anything helps). I may also use the standard firewall insulation but that stuff doesn't work very well unless you can keep it completely air sealed against the firewall. The last thing I am going to try to avoid this problem is to use insulated duct instead of regular SCAT. The stuff is hard to find, and a lot more expensive, but heat is a serious problem living in Texas (at least to someone from Wisconsin ) and I really want to keep it controlled.
Michael Sausen
RV-10 #352 Working on Fuselage
Do Not Archive
--
| | - 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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johnwcox(at)pacificnw.com
Guest
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| Posted: Tue Apr 25, 2006 8:41 pm Post subject: tunnel heat |
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Are you speaking of your current #40415 project or your father’s #40241 (N256H) or both when you say “We Have”? Randy’s thought that both #241 and his #006 had the earlier cross muffler design was a logical answer to less of a problem comparison with either the valve design or scat ductwork. Rather new twin muffler design.
John - $00.02
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Jesse Saint
Sent: Tuesday, April 25, 2006 5:40 PM
To: rv10-list(at)matronics.com
Subject: RE: tunnel heat
We have the dual muffler setup.
Jesse Saint
I-TEC, Inc.
jesse(at)itecusa.org (jesse(at)itecusa.org)
www.itecusa.org
352-465-4545
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Randy DeBauw
Sent: Tuesday, April 25, 2006 5:03 PM
To: rv10-list(at)matronics.com
Subject: RE: tunnel heat
Jesse, I am just fishing here. What exhaust system do you have? I have the AWI system with one muffler running crosswise under the engine and do not have a heating issue. Randy
| | - 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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jesse(at)itecusa.org
Guest
|
| Posted: Wed Apr 26, 2006 6:00 am Post subject: tunnel heat |
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N256H #40241 has the dual muffler and I assume 40415 will as well, but we don’t have it yet.
Jesse Saint
I-TEC, Inc.
jesse(at)itecusa.org (jesse(at)itecusa.org)
www.itecusa.org
352-465-4545
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of John W. Cox
Sent: Tuesday, April 25, 2006 11:38 PM
To: rv10-list(at)matronics.com
Subject: RE: tunnel heat
Are you speaking of your current #40415 project or your father’s #40241 (N256H) or both when you say “We Have”? Randy’s thought that both #241 and his #006 had the earlier cross muffler design was a logical answer to less of a problem comparison with either the valve design or scat ductwork. Rather new twin muffler design.
John - $00.02
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Jesse Saint
Sent: Tuesday, April 25, 2006 5:40 PM
To: rv10-list(at)matronics.com
Subject: RE: tunnel heat
We have the dual muffler setup.
Jesse Saint
I-TEC, Inc.
jesse(at)itecusa.org (jesse(at)itecusa.org)
www.itecusa.org
352-465-4545
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Randy DeBauw
Sent: Tuesday, April 25, 2006 5:03 PM
To: rv10-list(at)matronics.com
Subject: RE: tunnel heat
Jesse, I am just fishing here. What exhaust system do you have? I have the AWI system with one muffler running crosswise under the engine and do not have a heating issue. Randy
| | - 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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