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Baffle advice

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rleffler

Joined: 05 Nov 2006
Posts: 680

Posted: Wed Jun 29, 2011 5:04 pm Post subject: Baffle advice

I ran into a couple “opportunities” at the hangar this evening that I’m soliciting opinions while I research for solutions.  The first issue is that the rear support brace for the baffle and one of the fuel tubes want to occupy the same space.  Since the fuel injector fuel lines were installed at Lycoming, I’m not quite sure how to proceed.  I’m concerned that if I attempt to bend the fuel line up, I may put a crease in the line.  I’m not sure if I should be concerned that with the other five cylinders are all horizontal in the same plane, if this line is elevated to get over this bracket.  Another option I thought about was to cut a slot in the bracket and isolate the fuel line with a grommet.  I haven’t referenced 43.13 yet to see what guidance it may provide.

 

[img]cid:image007.png(at)01CC369E.D2410170[/img]

 

[img]cid:image008.png(at)01CC369E.D2410170[/img]

 

The next issue probably falls in the category of me doing something wrong or not doing the obvious.  What’s the secret to get this baffle mounted without severely bending it?

 

[img]cid:image009.png(at)01CC369E.D2410170[/img]

 

Any suggestions are appreciated.

 

25 days and counting……

 

bob

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_________________
Bob Leffler
N410BL - Phase I
http://mykitlog.com/rleffler

pitts_pilot(at)bellsouth.
Guest

Posted: Wed Jun 29, 2011 5:40 pm Post subject: Baffle advice

If it were me, I'd mark the baffle where the tubing is, cut a 1/2     quarter size bite out of the bracket. Clean up the edges and     re-install the bracket.  I'm not there yet, so don't know if I'll     have the same problem.

     Linn

     

     On 6/29/2011 8:55 PM, Bob Leffler wrote:     [quote]                     v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} <![endif]-->         <![endif]-->   <![endif]-->                

I ran into a couple “opportunities” at the           hangar this evening that I’m soliciting opinions while I           research for solutions.  The first issue is that the rear           support brace for the baffle and one of the fuel tubes want to           occupy the same space.  Since the fuel injector fuel lines           were installed at Lycoming, I’m not quite sure how to           proceed.  I’m concerned that if I attempt to bend the fuel           line up, I may put a crease in the line.  I’m not sure if I           should be concerned that with the other five cylinders are all           horizontal in the same plane, if this line is elevated to get           over this bracket.  Another option I thought about was to cut           a slot in the bracket and isolate the fuel line with a           grommet.  I haven’t referenced 43.13 yet to see what guidance           it may provide.

                

     [b]

Kellym

Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ

Posted: Wed Jun 29, 2011 6:59 pm Post subject: Baffle advice

Bob,

Your best guidance is Lyc SB 342E, page 25, a specific diagram of where 

the lines are required to be, per AD 2008-14-07 Lycoming Engines 

(formerly Textron Lycoming Division, AVCO Corporation): Amendment 39-15602.

I won't get into the debate as to whether it is a requirement for 

experimentals.

Main concern with those lines is weakening the fitting joints at either 

end and ensuring they are adequately supported so that they don't work 

harden from vibration. You can gently bend in the middle, keeping 

bending forces away from the ends as long as you keep large radius. I 

wouldn't worry about elevation. The fuel is under 4-10 psi in those 

lines, generally. I agree with Linn's advice, to first try to remove 

enough of the baffle support to allow the line to remain in the location 

Lycoming placed it.

Kelly

PS, I can email you the SB direct if you need it.

On 6/29/2011 5:55 PM, Bob Leffler wrote:

 	  Quote: 	
		  

 I ran into a couple “opportunities” at the hangar this evening that 

 I’m soliciting opinions while I research for solutions. The first 

 issue is that the rear support brace for the baffle and one of the 

 fuel tubes want to occupy the same space. Since the fuel injector fuel 

 lines were installed at Lycoming, I’m not quite sure how to proceed. 

 I’m concerned that if I attempt to bend the fuel line up, I may put a 

 crease in the line. I’m not sure if I should be concerned that with 

 the other five cylinders are all horizontal in the same plane, if this 

 line is elevated to get over this bracket. Another option I thought 

 about was to cut a slot in the bracket and isolate the fuel line with 

 a grommet. I haven’t referenced 43.13 yet to see what guidance it may 

 provide.



 The next issue probably falls in the category of me doing something 

 wrong or not doing the obvious. What’s the secret to get this baffle 

 mounted without severely bending it?



 Any suggestions are appreciated.



 25 days and counting……



 bob

_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD

robin(at)PaintTheWeb.com
Guest

Posted: Wed Jun 29, 2011 7:44 pm Post subject: Baffle advice

Along with the aforementioned solution is the possibility to add another adel clamp to further stabilize the tube as it bypasses the bracket. 

 

Robin 

Do Not Archive

 

  [quote][b]

flysrv10(at)gmail.com
Guest

Posted: Thu Jun 30, 2011 1:32 am Post subject: Baffle advice

Cut the bracket.



do not archive.



On Jun 29, 2011, at 8:55 PM, Bob Leffler wrote:

 	  Quote: 	
		  I ran into a couple “opportunities” at the hangar this evening that I’m soliciting opinions while I research for solutions.  The first issue is that the rear support brace for the baffle and one of the fuel tubes want to occupy the same space.  Since the fuel injector fuel lines were installed at Lycoming, I’m not quite sure how to proceed.  I’m concerned that if I attempt to bend the fuel line up, I may put a crease in the line.  I’m not sure if I should be concerned that with the other five cylinders are all horizontal in the same plane, if this line is elevated to get over this bracket.  Another option I thought about was to cut a slot in the bracket and isolate the fuel line with a grommet.  I haven’t referenced 43.13 yet to see what guidance it may provide.

 

<image007.png>

 

<image008.png>

 

The next issue probably falls in the category of me doing something wrong or not doing the obvious.  What’s the secret to get this baffle mounted without severely bending it?

 

<image009.png>

 

Any suggestions are appreciated.

 

25 days and counting……

 

bob

aerosport1

Joined: 07 Nov 2007
Posts: 231

Posted: Thu Jun 30, 2011 4:15 am Post subject: Baffle advice

Bob make a nice half round cut out in the bracket. I had to cut mine out for my Ignition coil.   

   

See link  

   

http://cdn-3-service.phanfare.com/images/external/7068012_3161550_64301362_Web_3/0_0_c6e7e93ae7bc906cc3c993621baec8f6_1  

     

[b]Geoff Combs[/b]    

President  

    

[b]614-834-5227p[/b]

 614-834-5230f  

    

www.aerosportmodeling.com  

    

   

  

        

  

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Bob Leffler

 Sent: Wednesday, June 29, 2011 8:55 PM

 To: rv10-list(at)matronics.com

 Subject: Baffle advice  

  

   

I ran into a couple “opportunities” at the hangar this evening that I’m soliciting opinions while I research for solutions.  The first issue is that the rear support brace for the baffle and one of the fuel tubes want to occupy the same space.  Since the fuel injector fuel lines were installed at Lycoming, I’m not quite sure how to proceed.  I’m concerned that if I attempt to bend the fuel line up, I may put a crease in the line.  I’m not sure if I should be concerned that with the other five cylinders are all horizontal in the same plane, if this line is elevated to get over this bracket.  Another option I thought about was to cut a slot in the bracket and isolate the fuel line with a grommet.  I haven’t referenced 43.13 yet to see what guidance it may provide.  

   

[img]cid:image004.gif(at)01CC36FD.5E3BB9A0[/img]  

   

[img]cid:image005.gif(at)01CC36FD.5E3BB9A0[/img]  

   

The next issue probably falls in the category of me doing something wrong or not doing the obvious.  What’s the secret to get this baffle mounted without severely bending it?  

   

[img]cid:image006.gif(at)01CC36FD.5E3BB9A0[/img]  

   

Any suggestions are appreciated.  

   

25 days and counting……  

   

bob

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_________________
Geoff Combs
RV-10 QB N829GW
Flying 500 hrs
40033

drfred(at)suddenlinkmail.
Guest

Posted: Thu Jun 30, 2011 5:07 am Post subject: Baffle advice

I cut a slot in mine right where you show.  Rounded the hole.  no     problems 3+ years.  

     

     Dr Fred

     515FW.

     

            

     

     

      [quote][b]

Tim Olson

Joined: 25 Jan 2007
Posts: 2878

Posted: Thu Jun 30, 2011 5:08 am Post subject: Baffle advice

Same here:

http://www.myrv10.com/N104CD/engine/20051107/RV200511060004.html

http://www.myrv10.com/N104CD/engine/20051107/RV200511060007.html



The bracket will be fine.



Tim Olson - RV-10 N104CD

On 6/30/2011 7:11 AM, Geoff Combs wrote:

 	  Quote: 	
		   Bob make a nice half round cut out in the bracket. I had to cut mine out

 for my Ignition coil.



 See link



 http://cdn-3-service.phanfare.com/images/external/7068012_3161550_64301362_Web_3/0_0_c6e7e93ae7bc906cc3c993621baec8f6_1



 **Geoff Combs**



 President



 **614-834-5227p**

 614-834-5230f



 www.aerosportmodeling.com <http://www.aerosportmodeling.com>



 ------------------------------------------------------------------------



 *From:*owner-rv10-list-server(at)matronics.com

 [mailto:owner-rv10-list-server(at)matronics.com] *On Behalf Of *Bob Leffler

 *Sent:* Wednesday, June 29, 2011 8:55 PM

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

 *Subject:* Baffle advice



 I ran into a couple “opportunities” at the hangar this evening that I’m

 soliciting opinions while I research for solutions. The first issue is

 that the rear support brace for the baffle and one of the fuel tubes

 want to occupy the same space. Since the fuel injector fuel lines were

 installed at Lycoming, I’m not quite sure how to proceed. I’m concerned

 that if I attempt to bend the fuel line up, I may put a crease in the

 line. I’m not sure if I should be concerned that with the other five

 cylinders are all horizontal in the same plane, if this line is elevated

 to get over this bracket. Another option I thought about was to cut a

 slot in the bracket and isolate the fuel line with a grommet. I haven’t

 referenced 43.13 yet to see what guidance it may provide.



 The next issue probably falls in the category of me doing something

 wrong or not doing the obvious. What’s the secret to get this baffle

 mounted without severely bending it?



 Any suggestions are appreciated.



 25 days and counting……



 bob

rleffler

Joined: 05 Nov 2006
Posts: 680

Posted: Thu Jun 30, 2011 6:09 pm Post subject: Baffle advice

Here’s the final result.  There’s about 1/8” gap between the fuel line and the bracket.  I may take a little more off, just for a safety margin.

 

                    <![endif]--><![if !vml]>[img]cid:image002.png(at)01CC3771.2580EC60[/img]<![endif]>  \s  <![endif]-->

 

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Rob Kermanj

Sent: Thursday, June 30, 2011 5:28 AM

To: rv10-list(at)matronics.com

Subject: Re: Baffle advice

 

Cut the bracket.

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_________________
Bob Leffler
N410BL - Phase I
http://mykitlog.com/rleffler

robin(at)PaintTheWeb.com
Guest

Posted: Fri Jul 01, 2011 9:48 am Post subject: Baffle advice

That still looks too close to me.  

 

Robin  

Do not archive

  

From: owner-rv10-list-server(at)matronics.com (owner-rv10-list-server(at)matronics.com) [mailto:owner-rv10-list-server(at)matronics.com (owner-rv10-list-server(at)matronics.com)] On Behalf Of Bob Leffler

 Sent: Thursday, June 30, 2011 7:01 PM

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

Subject: RE: Baffle advice

  

Here’s the final result.  There’s about 1/8” gap between the fuel line and the bracket.  I may take a little more off, just for a safety margin. 

 

[img]cid:image003.png(at)01CC37DB.EF988F20[/img] 

 

 From: owner-rv10-list-server(at)matronics.com (owner-rv10-list-server(at)matronics.com) [mailto:owner-rv10-list-server(at)matronics.com (owner-rv10-list-server(at)matronics.com)] On Behalf Of Rob Kermanj

 Sent: Thursday, June 30, 2011 5:28 AM

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

Subject: Re: Baffle advice

  

Cut the bracket.

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rleffler

Joined: 05 Nov 2006
Posts: 680

Posted: Fri Jul 01, 2011 3:56 pm Post subject: Baffle advice

There’s more of a gap than it looks in the picture.  With that said, I plan on opening the gap from 1/8” to ¼”.

 

bob

 

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Robin Marks

Sent: Friday, July 01, 2011 1:45 PM

To: rv10-list(at)matronics.com

Subject: RE: Baffle advice

 

That still looks too close to me. 

 

Robin 

Do not archive

 

From: owner-rv10-list-server(at)matronics.com (owner-rv10-list-server(at)matronics.com) [mailto:owner-rv10-list-server(at)matronics.com (owner-rv10-list-server(at)matronics.com)] On Behalf Of Bob Leffler

Sent: Thursday, June 30, 2011 7:01 PM

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

Subject: RE: Baffle advice

 

Here’s the final result.  There’s about 1/8” gap between the fuel line and the bracket.  I may take a little more off, just for a safety margin.

 

[img]cid:image001.png(at)01CC3827.E54B2950[/img]

 

From: owner-rv10-list-server(at)matronics.com (owner-rv10-list-server(at)matronics.com) [mailto:owner-rv10-list-server(at)matronics.com (owner-rv10-list-server(at)matronics.com)] On Behalf Of Rob Kermanj

Sent: Thursday, June 30, 2011 5:28 AM

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

Subject: Re: Baffle advice

 

Cut the bracket.

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602.61 KB

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7260 Time(s)

_________________
Bob Leffler
N410BL - Phase I
http://mykitlog.com/rleffler

AV8ORJWC

Joined: 13 Jul 2006
Posts: 1149
Location: Aurora, Oregon "Home of VANS"

Posted: Fri Jul 01, 2011 5:01 pm Post subject: Baffle advice

You can take a rubber grommet of the correct I.D., cut it cross-sectional from the center out to the circumference to insert over the injector line and slide it right over the modified bracket.  That will give you correct separation and dampening.

  



  John Cox



 

  From: owner-rv10-list-server(at)matronics.com on behalf of Bob Leffler

Sent: Fri 7/1/2011 4:48 PM

To: rv10-list(at)matronics.com

Subject: RE: Baffle advice

   

There’s more of a gap than it looks in the picture.  With that said, I plan on opening the gap from 1/8” to ¼”. 

  

bob 

    

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Robin Marks

Sent: Friday, July 01, 2011 1:45 PM

To: rv10-list(at)matronics.com

Subject: RE: Baffle advice



 

  

That still looks too close to me.  

  

Robin  

Do not archive 

    

From: owner-rv10-list-server(at)matronics.com (owner-rv10-list-server(at)matronics.com) [mailto:owner-rv10-list-server(at)matronics.com (owner-rv10-list-server(at)matronics.com)] On Behalf Of Bob Leffler

Sent: Thursday, June 30, 2011 7:01 PM

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

Subject: RE: Baffle advice



 

  

Here’s the final result.  There’s about 1/8” gap between the fuel line and the bracket.  I may take a little more off, just for a safety margin. 

  

[img]image001.png[/img] 

    

From: owner-rv10-list-server(at)matronics.com (owner-rv10-list-server(at)matronics.com) [mailto:owner-rv10-list-server(at)matronics.com (owner-rv10-list-server(at)matronics.com)] On Behalf Of Rob Kermanj

Sent: Thursday, June 30, 2011 5:28 AM

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

Subject: Re: Baffle advice



 

  

Cut the bracket.

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