Matronics Email Lists :: View topic

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Hot Tunnels

Matronics Email Lists Forum Index -> RV10-List

View previous topic :: View next topic

Author Message

dmaib@me.com

Joined: 25 Apr 2006
Posts: 455
Location: New Smyrna Beach, Florida

Posted: Thu Apr 26, 2007 3:04 am Post subject: Hot Tunnels

I have not seen anything about hot tunnels for a long time now. I am curious to know if any -10 flying with the Sam James cowl (maybe just one flying so far?) has hot tunnel problems. How about anybody flying with the firewall insulated on the front side? This was such a huge issue just a few months ago and now is completely quiet. Did I miss out on the miracle cure?

_________________
David Maib
RV-10 #40559
New Smyrna Beach, FL

Tim Olson

Joined: 25 Jan 2007
Posts: 2879

Posted: Thu Apr 26, 2007 3:50 am Post subject: Hot Tunnels

I never had it where I could call it hot, except it did get

pretty warm by the heater outlets in the cabin when there was

heat on either front or rear.  But, during my inspection this

year I decided that with hot air SCAT tubes in close prox. to

fuel lines and fuel valves, it would be nice to do more, so I

wrapped my SCAT tubes with the same silver reflective insulation

that's foam/fiber filled as I used on the firewall.  The result

was a week or two ago I went barefoot and felt the tunnel and

it was almost not even noticeably warm.  I insulated back to

the fuel valve.  That gives me a little more margin for warmth

against that tunnel being warm enough to vaporize the fuel.

But, I didn't do it because of a problem, just because it seemed

prudent.



Tim Olson - RV-10 N104CD - Flying

do not archive

dmaib(at)mac.com wrote:

 	  Quote: 	
		   

 

 I have not seen anything about hot tunnels for a long time now. I am

 curious to know if any -10 flying with the Sam James cowl (maybe just

 one flying so far?) has hot tunnel problems. How about anybody flying

 with the firewall insulated on the front side? This was such a huge

 issue just a few months ago and now is completely quiet. Did I miss

 out on the miracle cure?

 

 -------- David Maib RV-10 #40559

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=109323#109323

GRANSCOTT(at)aol.com
Guest

Posted: Thu Apr 26, 2007 4:12 am Post subject: Hot Tunnels

In a message dated 4/26/2007 7:53:05 AM Eastern Daylight Time, Tim(at)MyRV10.com writes:

  	  Quote: 	
		  I insulated back to

the fuel valve.  That gives me a little more margin for warmth

against that tunnel being warm enough to vaporize the fuel.

But, I didn't do it because of a problem, just because it seemed

prudent. 	


 Tim with the ambient air now on a warming cycle in your area do you think the relatively cool winter air may have aided in the cooling effect?

  

 Patrick



See what's free at AOL.com. 

  [quote][b]

dmaib@me.com

Joined: 25 Apr 2006
Posts: 455
Location: New Smyrna Beach, Florida

Posted: Thu Apr 26, 2007 4:15 am Post subject: Hot Tunnels

TIm, as I recall, you also had your exhaust stacks lengthened. Do you  

think that is a good idea as well? Thanks for the info.



David Maib

#40559



do not archive



On Apr 26, 2007, at 6:50 AM, Tim Olson wrote:






I never had it where I could call it hot, except it did get

pretty warm by the heater outlets in the cabin when there was

heat on either front or rear.  But, during my inspection this

year I decided that with hot air SCAT tubes in close prox. to

fuel lines and fuel valves, it would be nice to do more, so I

wrapped my SCAT tubes with the same silver reflective insulation

that's foam/fiber filled as I used on the firewall.  The result

was a week or two ago I went barefoot and felt the tunnel and

it was almost not even noticeably warm.  I insulated back to

the fuel valve.  That gives me a little more margin for warmth

against that tunnel being warm enough to vaporize the fuel.

But, I didn't do it because of a problem, just because it seemed

prudent.



Tim Olson - RV-10 N104CD - Flying

do not archive

dmaib(at)mac.com wrote:

 	  Quote: 	
		   

 I have not seen anything about hot tunnels for a long time now. I am

 curious to know if any -10 flying with the Sam James cowl (maybe just

 one flying so far?) has hot tunnel problems. How about anybody flying

 with the firewall insulated on the front side? This was such a huge

 issue just a few months ago and now is completely quiet. Did I miss

 out on the miracle cure?

 -------- David Maib RV-10 #40559

 Read this topic online here:

 http://forums.matronics.com/viewtopic.php?p=109323#109323

_________________
David Maib
RV-10 #40559
New Smyrna Beach, FL

Tim Olson

Joined: 25 Jan 2007
Posts: 2879

Posted: Thu Apr 26, 2007 5:28 am Post subject: Hot Tunnels

I'm sure it didn't hurt, but the day I flew and was barefoot,

we had a warm week with temps in the 80's, so it was all

shorts and T-shirts and flip-flops, so while it isn't exactly

the same as being in the Desert, it at least wasn't a cold

Wisconsin day in comparison.



I think perhaps a huge factor in the hot tunnels is how well

the builder's heater control flap doors shut.  If you get any

hot air flowing through that SCAT, it will get very warm

around the outlets where the SCAT hits the aluminum flange.

Tim Olson - RV-10 N104CD - Flying

do not archive

GRANSCOTT(at)aol.com wrote:

 	  Quote: 	
		   In a message dated 4/26/2007 7:53:05 AM Eastern Daylight Time, 

 Tim(at)MyRV10.com writes:

 

     I insulated back to

     the fuel valve.  That gives me a little more margin for warmth

     against that tunnel being warm enough to vaporize the fuel.

     But, I didn't do it because of a problem, just because it seemed

     prudent.

 

 Tim with the ambient air now on a warming cycle in your area do you 

 think the relatively cool winter air may have aided in the cooling effect?

  

 Patrick

Tim Olson

Joined: 25 Jan 2007
Posts: 2879

Posted: Thu Apr 26, 2007 5:29 am Post subject: Hot Tunnels

I don't think it's a bad idea at all.  But, my stacks were made

shorter than the ones sold after them, so by my adding length,

I only made them more "normal" by newer kit's standards.  So

for any builders that are far down the line from kit# 170, I

don't think you'll really want to do anything special.



Tim Olson - RV-10 N104CD - Flying

do not archive

David Maib wrote:

 	  Quote: 	
		   

 

 TIm, as I recall, you also had your exhaust stacks lengthened. Do you 

 think that is a good idea as well? Thanks for the info.

 

 David Maib

 #40559

CJohnston(at)popsound.com
Guest

Posted: Thu Apr 26, 2007 7:22 am Post subject: Hot Tunnels

along this line, i had a question about the scat tubing in the tunnel...  it looks as if it is supposed to just rest on the WD-1010 control column as it passes in the tunnel.  is this correct?  do i need to secure this in some fashion.  does the movement of the WD-1010 chafe on the scat?



questions questions

cj

#40410

fuse/finish

www.perfectlygoodairplane.net

do not archive

--

jesse(at)saintaviation.co
Guest

Posted: Thu Apr 26, 2007 7:45 am Post subject: Hot Tunnels

Of course, remember that #170 doesn't mean much on the exhaust, but rather

what date your FWF kit was shipped.



Do not archive



Jesse Saint

Saint Aviation, Inc.

jesse(at)saintaviation.com

www.saintaviation.com

Cell: 352-427-0285

Fax: 815-377-3694



--

Tim Olson

Joined: 25 Jan 2007
Posts: 2879

Posted: Thu Apr 26, 2007 8:35 am Post subject: Hot Tunnels

With it secured up in the tunnel, it really doesn't sag that far

down if you have it fit well, so if it touches, it would be

rare and only at control travel extremes.  I looked at that

well during the inspection to see if there was anything

happening and there wasn't.  I think it's pretty much clear

of it most of the time.

Tim



Chris Johnston wrote:

 	  Quote: 	
		   along this line, i had a question about the scat tubing in the

 tunnel...  it looks as if it is supposed to just rest on the WD-1010

 control column as it passes in the tunnel.  is this correct?  do i

 need to secure this in some fashion.  does the movement of the

 WD-1010 chafe on the scat?

 

 questions questions cj #40410 fuse/finish 

 www.perfectlygoodairplane.net do not archive

Tim Olson

Joined: 25 Jan 2007
Posts: 2879

Posted: Thu Apr 26, 2007 8:36 am Post subject: Hot Tunnels

Dang, I keep forgetting that caveat.  Yes, it would be based on

when you get the FWF kit.  For me, it was nearing 2 years

ago now.  So if yours was delivered well after that, you probably

have nothing to worry about.  There are a few flying -10's

built with FWF kits after mine and they made me look like

I was the one with the short dangling things, instead of

the long ones.  (but I'm used to that by now after all

these years) 



Tim Olson - RV-10 N104CD - Flying

do not archive

Jesse Saint wrote:

[quote] 

 

 Of course, remember that #170 doesn't mean much on the exhaust, but rather

 what date your FWF kit was shipped.

 

 Do not archive

 

 Jesse Saint

 Saint Aviation, Inc.

 jesse(at)saintaviation.com

 www.saintaviation.com

 Cell: 352-427-0285

 Fax: 815-377-3694

 

 --

Display posts from previous:

	Matronics Email Lists Forum Index -> RV10-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum