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length of exhaust pipes

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dlm34077(at)q.com
Guest

Posted: Fri Mar 30, 2012 12:03 pm Post subject: length of exhaust pipes

Any correlation between the length of exhaust tubes and the length and breadth of the exhaust soot on the belly? How long are your exhaust tubes? How much crud on the underside?  

       [quote][b]

rv10flyer(at)verizon.net
Guest

Posted: Fri Mar 30, 2012 12:37 pm Post subject: length of exhaust pipes

I think most of the crud comes from the oil blow-by. I don’t really have  any soot on my  belly, I have a oil separator that I drain every once in  while.

  From: DLM (dlm34077(at)q.com) 

 Sent: Friday, March 30, 2012 1:01 PM

 To: rv10-list(at)matronics.com (rv10-list(at)matronics.com) 

 Subject: length of exhaust pipes

Any correlation between the length  of exhaust tubes and the length and breadth of the exhaust soot on the belly?  How long are your exhaust tubes? How much crud on the  underside?

[quote]

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[b]

partner14

Joined: 12 Jan 2008
Posts: 540
Location: Granbury Texas

Posted: Fri Mar 30, 2012 2:04 pm Post subject: length of exhaust pipes

I bet you haven't even been under your plane to even think about cleaning the belly!  Boy was the flight down to the keys and the lunch in Marathin GREAT today.

 



    

From: Pascal <rv10flyer(at)verizon.net>

To: rv10-list(at)matronics.com 

Sent: Friday, March 30, 2012 3:36 PM

Subject: Re: length of exhaust pipes

         I think most of the crud comes from the oil blow-by. I don’t really have any soot on my  belly, I have a oil separator that I drain every once in while.

    

  From: DLM (dlm34077(at)q.com) 

 Sent: Friday, March 30, 2012 1:01 PM

 To: rv10-list(at)matronics.com (rv10-list(at)matronics.com) 

 Subject: length of exhaust pipes

  



   Any correlation between the length of exhaust tubes and the length and breadth of the exhaust soot on the belly? How long are your exhaust tubes? How much crud on the underside?



[quote]



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[b]

_________________
Don A. McDonald
40636

rv10flyer

Joined: 25 Aug 2009
Posts: 364

Posted: Fri Mar 30, 2012 3:12 pm Post subject: Re: length of exhaust pipes

Mine are really long. I run lean except for takeoff/climbout. During break in a ran rich and exhaust pipes were black inside. Now tan. After 10 hrs I get a really thin layer of oil on the bottom.

_________________
Wayne G.

mauledriver(at)nc.rr.com
Guest

Posted: Sat Mar 31, 2012 4:18 am Post subject: length of exhaust pipes

With the 'factory' engine setup and exhaust, I don't really get any soot at 125hrs+.  I'll try to remember to measure the clearance next time I get to the plane

I do get oil which seems to all come from the breather tube.  I should have a better measure but it seems to be down about a quart per 25 - 30 hours.  It stays pretty clean.

I do get a little soot coming out of the gear exit points at the wing roots (??)

Bill



Sent from my iPad



On Mar 30, 2012, at 4:01 PM, "DLM" <dlm34077(at)q.com (dlm34077(at)q.com)> wrote:



[quote]               

Any correlation between the length of exhaust tubes and the length and breadth of the exhaust soot on the belly? How long are your exhaust tubes? How much crud on the underside?  

        	  Quote: 	
		  

	


[b]

Tim Olson

Joined: 25 Jan 2007
Posts: 2879

Posted: Sat Mar 31, 2012 11:39 am Post subject: length of exhaust pipes

That's not soot. That's rubber from the tires.



Tim



On 3/31/2012 7:16 AM, Bill Watson wrote:

 	  Quote: 	
		   With the 'factory' engine setup and exhaust, I don't really get any soot

 at 125hrs+. I'll try to remember to measure the clearance next time I

 get to the plane



 I do get oil which seems to all come from the breather tube. I should

 have a better measure but it seems to be down about a quart per 25 - 30

 hours. It stays pretty clean.



 I do get a little soot coming out of the gear exit points at the wing

 roots (??)



 Bill



 Sent from my iPad



 On Mar 30, 2012, at 4:01 PM, "DLM" <dlm34077(at)q.com

 <mailto:dlm34077(at)q.com>> wrote:



> Any correlation between the length of exhaust tubes and the length and

> breadth of the exhaust soot on the belly? How long are your exhaust

> tubes? How much crud on the underside?

>

mdaniell

Joined: 07 Nov 2009
Posts: 7

Posted: Sat Mar 31, 2012 5:05 pm Post subject: Re: length of exhaust pipes

.......or brake pad powder.



 	  Tim Olson wrote: 	
		  That's not soot. That's rubber from the tires.



Tim



On 3/31/2012 7:16 AM, Bill Watson wrote:

 	  Quote: 	
		   With the 'factory' engine setup and exhaust, I don't really get any soot

 at 125hrs+. I'll try to remember to measure the clearance next time I

 get to the plane



 I do get oil which seems to all come from the breather tube. I should

 have a better measure but it seems to be down about a quart per 25 - 30

 hours. It stays pretty clean.



 I do get a little soot coming out of the gear exit points at the wing

 roots (??)



 Bill



 Sent from my iPad



 On Mar 30, 2012, at 4:01 PM, "DLM" <dlm34077(at)q.com

 <mailto>> wrote:



> Any correlation between the length of exhaust tubes and the length and

> breadth of the exhaust soot on the belly? How long are your exhaust

> tubes? How much crud on the underside?

>

kdbelue(at)charter.net
Guest

Posted: Sun Apr 01, 2012 9:31 am Post subject: length of exhaust pipes

And brake dust.....



Sent from my iPhone



On Mar 31, 2012, at 2:36 PM, Tim Olson <Tim(at)MyRV10.com> wrote:



 	  Quote: 	
		   

 

 That's not soot. That's rubber from the tires.

 

 Tim

 

 On 3/31/2012 7:16 AM, Bill Watson wrote:

> With the 'factory' engine setup and exhaust, I don't really get any soot

> at 125hrs+. I'll try to remember to measure the clearance next time I

> get to the plane

> 

> I do get oil which seems to all come from the breather tube. I should

> have a better measure but it seems to be down about a quart per 25 - 30

> hours. It stays pretty clean.

> 

> I do get a little soot coming out of the gear exit points at the wing

> roots (??)

> 

> Bill

> 

> Sent from my iPad

> 

> On Mar 30, 2012, at 4:01 PM, "DLM" <dlm34077(at)q.com

> <mailto:dlm34077(at)q.com>> wrote:

> 

>> Any correlation between the length of exhaust tubes and the length and

>> breadth of the exhaust soot on the belly? How long are your exhaust

>> tubes? How much crud on the underside?

>>

Tim Olson

Joined: 25 Jan 2007
Posts: 2879

Posted: Sun Apr 01, 2012 10:25 am Post subject: length of exhaust pipes

Yes, that too.  Some of it is definitely rubber if you scrape it

off you can tell. The particles are pretty good sized.



Tim Olson - RV-10 N104CD

do not archive

On 4/1/2012 12:21 PM, Kevin Belue wrote:

 	  Quote: 	
		   

 And brake dust.....



 Sent from my iPhone



 On Mar 31, 2012, at 2:36 PM, Tim Olson<Tim(at)MyRV10.com>  wrote:



> 

>

> That's not soot. That's rubber from the tires.

>

> Tim

>

> On 3/31/2012 7:16 AM, Bill Watson wrote:

>> With the 'factory' engine setup and exhaust, I don't really get any soot

>> at 125hrs+. I'll try to remember to measure the clearance next time I

>> get to the plane

>>

>> I do get oil which seems to all come from the breather tube. I should

>> have a better measure but it seems to be down about a quart per 25 - 30

>> hours. It stays pretty clean.

>>

>> I do get a little soot coming out of the gear exit points at the wing

>> roots (??)

>>

>> Bill

>>

>> Sent from my iPad

>>

>> On Mar 30, 2012, at 4:01 PM, "DLM"<dlm34077(at)q.com

>> <mailto:dlm34077(at)q.com>>  wrote:

>>

>>> Any correlation between the length of exhaust tubes and the length and

>>> breadth of the exhaust soot on the belly? How long are your exhaust

>>> tubes? How much crud on the underside?

>>>

>

Mauledriver(at)nc.rr.com
Guest

Posted: Sun Apr 01, 2012 3:42 pm Post subject: length of exhaust pipes

Well, brake dust and rubber particles do seem to shoot up the gear legs 

and blow into and out of the fuselage near the gear exit holes.  Didn't 

expect that but now it all makes sense.  I probably have more brake dust 

and dirt than rubber... probably because more than 50% of my ops are on 

a grass strip.

I took another look and measured my 'factory' engine and exhaust setup.  

One pipe's opening starts 5" below the fuselage bottom, the other 6".  

No noticeable soot on the fuselage bottom.  The belly mounted antenna is 

a bit darkened but it's way under the belly where no one can see it (or 

clean) easily.

But as I said before, there is a good coating of oil.  I cleaned it 

recently but it oils up pretty quickly.  Seems to come exclusively from 

the breather.  Can't correlate it to any excess oil consumption.  A 

little goes a long way.

Bill

On 4/1/2012 2:25 PM, Tim Olson wrote:

 	  Quote: 	

 Yes, that too.  Some of it is definitely rubber if you scrape it

 off you can tell. The particles are pretty good sized.

 Tim Olson - RV-10 N104CD

 do not archive

 On 4/1/2012 12:21 PM, Kevin Belue wrote:

> 

> And brake dust.....

>

> Sent from my iPhone

>

> On Mar 31, 2012, at 2:36 PM, Tim Olson<Tim(at)MyRV10.com>  wrote:

>

>> 

>>

>> That's not soot. That's rubber from the tires.

>>

>> Tim

>>

>> On 3/31/2012 7:16 AM, Bill Watson wrote:

>>> With the 'factory' engine setup and exhaust, I don't really get any 

>>> soot

>>> at 125hrs+. I'll try to remember to measure the clearance next time I

>>> get to the plane

>>>

>>> I do get oil which seems to all come from the breather tube. I should

>>> have a better measure but it seems to be down about a quart per 25 

>>> - 30

>>> hours. It stays pretty clean.

>>>

>>> I do get a little soot coming out of the gear exit points at the wing

>>> roots (??)

>>>

>>> Bill

>>>

>>> Sent from my iPad

>>>

>>> On Mar 30, 2012, at 4:01 PM, "DLM"<dlm34077(at)q.com

>>> <mailto:dlm34077(at)q.com>>  wrote:

>>>

>>>> Any correlation between the length of exhaust tubes and the length 

>>>> and

>>>> breadth of the exhaust soot on the belly? How long are your exhaust

>>>> tubes? How much crud on the underside?

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