---------------------------------------------------------- RV8-List Digest Archive --- Total Messages Posted Mon 05/11/09: 9 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:34 PM - Air Ramp Cracking (Craig Gallenbach) 2. 04:52 PM - Re: Air Ramp Cracking (scott bilinski) 3. 05:11 PM - Re: Air Ramp Cracking (Larry Bowen) 4. 05:31 PM - Re: Air Ramp Cracking (Craig Gallenbach) 5. 05:33 PM - Re: Air Ramp Cracking (Carl Froehlich) 6. 05:38 PM - Re: Air Ramp Cracking (Larry Bowen) 7. 06:11 PM - Re: Air Ramp Cracking (Matt Dralle) 8. 06:24 PM - Re: Air Ramp Cracking (Matt Dralle) 9. 06:41 PM - Re: Air Ramp Cracking (Larry Bowen) ________________________________ Message 1 _____________________________________ Time: 04:34:13 PM PST US From: Craig Gallenbach Subject: RV8-List: Air Ramp Cracking After a mere 60 hours TT I have noticed cracks around rivets on the F867 ai r ramp on my RV8A.- The cracks are at the outboard rivets that attach the air ramp to the center F867D stiffener.- I suspect there is a lot of vib ration from the engine exhaust pipes that end just about in that area.- I have the standard Vetterman exhaust bought through Vans and after about 20 hours or so I added a set of 20 degree turndown exhaust extensions from Ve tterman.--The extensions-seemed to help overall noise and vibration i n the cockpit, but obviously there is still a significant amount of vibrati on causing the ramp to crack.- It looks like I'll have to replace the ram p, but that is not addressing the root cause of the problem.- - Has anyone else seen and solved this problem?- Additional stiffeners on t he air ramp?- Longer exhaust extensions?- Any help would be appreciated .. - Thanks in advance. - Craig Gallenbach Eastover, NC RV8A N184CG 60 hrs. ________________________________ Message 2 _____________________________________ Time: 04:52:58 PM PST US From: scott bilinski Subject: Re: RV8-List: Air Ramp Cracking I just sheered a piece of stainless and popped it in place. Oh I also bonded it with Pro-seal to hopefulle stop any vibration. It runs the full length and width of the exhaust ramp Its a simple fix that actually looks good with no paint. Scott --- On Mon, 5/11/09, Craig Gallenbach wrote: > From: Craig Gallenbach > Subject: RV8-List: Air Ramp Cracking > To: rv8-list@matronics.com > Date: Monday, May 11, 2009, 4:33 PM > After a mere 60 hours TT I have > noticed cracks around rivets on the F867 air ramp on my > RV8A. The cracks are at the outboard rivets that > attach the air ramp to the center F867D stiffener. I > suspect there is a lot of vibration from the engine exhaust > pipes that end just about in that area. I have the > standard Vetterman exhaust bought through Vans and after > about 20 hours or so I added a set of 20 degree turndown > exhaust extensions from Vetterman.The > extensionsseemed to help overall noise and vibration > in the cockpit, but obviously there is still a significant > amount of vibration causing the ramp to crack. It > looks like I'll have to replace the ramp, but that is > not addressing the root cause of the problem. > > Has anyone else seen and solved this problem? > Additional stiffeners on the air ramp? Longer exhaust > extensions? Any help would be appreciated. > > Thanks in advance. > > Craig Gallenbach > Eastover, NC > RV8A N184CG 60 hrs. > > > > ________________________________ Message 3 _____________________________________ Time: 05:11:10 PM PST US Subject: Re: RV8-List: Air Ramp Cracking From: Larry Bowen I had the piccolo type extensions on mine. Good sound and no cracks in 365 hours. Otherwise ramps were stock. On 5/11/09, scott bilinski wrote: > > > I just sheered a piece of stainless and popped it in place. Oh I also bonded > it with Pro-seal to hopefulle stop any vibration. It runs the full length > and width of the exhaust ramp Its a simple fix that actually looks good with > no paint. > > > Scott > > > --- On Mon, 5/11/09, Craig Gallenbach wrote: > >> From: Craig Gallenbach >> Subject: RV8-List: Air Ramp Cracking >> To: rv8-list@matronics.com >> Date: Monday, May 11, 2009, 4:33 PM >> After a mere 60 hours TT I have >> noticed cracks around rivets on the F867 air ramp on my >> RV8A. The cracks are at the outboard rivets that >> attach the air ramp to the center F867D stiffener. I >> suspect there is a lot of vibration from the engine exhaust >> pipes that end just about in that area. I have the >> standard Vetterman exhaust bought through Vans and after >> about 20 hours or so I added a set of 20 degree turndown >> exhaust extensions from Vetterman.The >> extensionsseemed to help overall noise and vibration >> in the cockpit, but obviously there is still a significant >> amount of vibration causing the ramp to crack. It >> looks like I'll have to replace the ramp, but that is >> not addressing the root cause of the problem. >> >> Has anyone else seen and solved this problem? >> Additional stiffeners on the air ramp? Longer exhaust >> extensions? Any help would be appreciated. >> >> Thanks in advance. >> >> Craig Gallenbach >> Eastover, NC >> RV8A N184CG 60 hrs. >> >> >> >> > > -- -- Larry Bowen Larry@BowenAero.com http://BowenAero.com ________________________________ Message 4 _____________________________________ Time: 05:31:50 PM PST US From: Craig Gallenbach Subject: Re: RV8-List: Air Ramp Cracking Larry, Where did you get the piccolo extensions? Craig Sent from my iPhone On May 11, 2009, at 8:10 PM, Larry Bowen wrote: I had the piccolo type extensions on mine. Good sound and no cracks in 365 hours. Otherwise ramps were stock. On 5/11/09, scott bilinski wrote: I just sheered a piece of stainless and popped it in place. Oh I also bonded it with Pro-seal to hopefulle stop any vibration. It runs the full length and width of the exhaust ramp Its a simple fix that actually looks good with no paint. Scott --- On Mon, 5/11/09, Craig Gallenbach wrote: From: Craig Gallenbach Subject: RV8-List: Air Ramp Cracking After a mere 60 hours TT I have noticed cracks around rivets on the F867 air ramp on my RV8A. The cracks are at the outboard rivets that attach the air ramp to the center F867D stiffener. I suspect there is a lot of vibration from the engine exhaust pipes that end just about in that area. I have the standard Vetterman exhaust bought through Vans and after about 20 hours or so I added a set of 20 degree turndown exhaust extensions from Vetterman. The extensions seemed to help overall noise and vibration in the cockpit, but obviously there is still a significant amount of vibration causing the ramp to crack. It looks like I'll have to replace the ramp, but that is not addressing the root cause of the problem. Has anyone else seen and solved this problem? Additional stiffeners on the air ramp? Longer exhaust extensions? Any help would be appreciated. Thanks in advance. Craig Gallenbach Eastover, NC RV8A N184CG 60 hrs. -- -- Larry Bowen Larry@BowenAero.com http://BowenAero.com ________________________________ Message 5 _____________________________________ Time: 05:33:34 PM PST US From: "Carl Froehlich" Subject: RE: RV8-List: Air Ramp Cracking Strongly agree on using pro-seal around the edges of the ramp. It reduces vibration and seals oil and such from inside of the double floor. Carl Froehlich RV-8A (475 hrs) RV-10 (fuselage) -----Original Message----- From: owner-rv8-list-server@matronics.com [mailto:owner-rv8-list-server@matronics.com] On Behalf Of scott bilinski Sent: Monday, May 11, 2009 7:52 PM Subject: Re: RV8-List: Air Ramp Cracking I just sheered a piece of stainless and popped it in place. Oh I also bonded it with Pro-seal to hopefulle stop any vibration. It runs the full length and width of the exhaust ramp Its a simple fix that actually looks good with no paint. Scott --- On Mon, 5/11/09, Craig Gallenbach wrote: > From: Craig Gallenbach > Subject: RV8-List: Air Ramp Cracking > To: rv8-list@matronics.com > Date: Monday, May 11, 2009, 4:33 PM > After a mere 60 hours TT I have > noticed cracks around rivets on the F867 air ramp on my > RV8A. The cracks are at the outboard rivets that > attach the air ramp to the center F867D stiffener. I > suspect there is a lot of vibration from the engine exhaust > pipes that end just about in that area. I have the > standard Vetterman exhaust bought through Vans and after > about 20 hours or so I added a set of 20 degree turndown > exhaust extensions from Vetterman.The > extensionsseemed to help overall noise and vibration > in the cockpit, but obviously there is still a significant > amount of vibration causing the ramp to crack. It > looks like I'll have to replace the ramp, but that is > not addressing the root cause of the problem. > > Has anyone else seen and solved this problem? > Additional stiffeners on the air ramp? Longer exhaust > extensions? Any help would be appreciated. > > Thanks in advance. > > Craig Gallenbach > Eastover, NC > RV8A N184CG 60 hrs. > > > > ________________________________ Message 6 _____________________________________ Time: 05:38:45 PM PST US Subject: Re: RV8-List: Air Ramp Cracking From: Larry Bowen They were the straight ones from Wicks: http://wicksaircraft.com/catalog/product_search_results.php/search=cGljY29sbw= I also had the edges prosealed, per the plans I think. -- Larry Bowen Larry@BowenAero.com http://BowenAero.com Sent from Welcome, NC, United States On Mon, May 11, 2009 at 8:28 PM, Craig Gallenbach wrote: > > > Larry, > > Where did you get the piccolo extensions? > > Craig > > Sent from my iPhone > > On May 11, 2009, at 8:10 PM, Larry Bowen wrote: > > > I had the piccolo type extensions on mine. Good sound and no cracks in > 365 hours. Otherwise ramps were stock. > > On 5/11/09, scott bilinski wrote: > > > I just sheered a piece of stainless and popped it in place. Oh I also > bonded > it with Pro-seal to hopefulle stop any vibration. It runs the full length > and width of the exhaust ramp Its a simple fix that actually looks good > with > no paint. > > > Scott > > > --- On Mon, 5/11/09, Craig Gallenbach wrote: > > From: Craig Gallenbach > Subject: RV8-List: Air Ramp Cracking > To: rv8-list@matronics.com > Date: Monday, May 11, 2009, 4:33 PM > After a mere 60 hours TT I have > noticed cracks around rivets on the F867 air ramp on my > RV8A. The cracks are at the outboard rivets that > attach the air ramp to the center F867D stiffener. I > suspect there is a lot of vibration from the engine exhaust > pipes that end just about in that area. I have the > standard Vetterman exhaust bought through Vans and after > about 20 hours or so I added a set of 20 degree turndown > exhaust extensions from Vetterman. The > extensions seemed to help overall noise and vibration > in the cockpit, but obviously there is still a significant > amount of vibration causing the ramp to crack. It > looks like I'll have to replace the ramp, but that is > not addressing the root cause of the problem. > > Has anyone else seen and solved this problem? > Additional stiffeners on the air ramp? Longer exhaust > extensions? Any help would be appreciated. > > Thanks in advance. > > Craig Gallenbach > Eastover, NC > RV8A N184CG 60 hrs. > > > -- > -- > Larry Bowen > Larry@BowenAero.com > http://BowenAero.com > > ________________________________ Message 7 _____________________________________ Time: 06:11:29 PM PST US From: Matt Dralle Subject: Re: RV8-List: Air Ramp Cracking ACS says "3db" noise reduction, but I wonder what HP reduction? Those look pretty restrictive...? Matt Dralle At 05:37 PM 5/11/2009 Monday, you wrote: >They were the straight ones from Wicks: > >http://wicksaircraft.com/catalog/product_search_results.php/search=cGljY29sbw= > >I also had the edges prosealed, per the plans I think. > >-- >Larry Bowen >Larry@BowenAero.com >http://BowenAero.com >Sent from Welcome, NC, United States > >On Mon, May 11, 2009 at 8:28 PM, Craig Gallenbach <craigtxtx@yahoo.com> wrote: > > >Larry, > >Where did you get the piccolo extensions? > >Craig > >Sent from my iPhone > >On May 11, 2009, at 8:10 PM, Larry Bowen <larry@bowenaero.com> wrote: > > >I had the piccolo type extensions on mine. Good sound and no cracks in >365 hours. Otherwise ramps were stock. > >On 5/11/09, scott bilinski <rv8a2001@yahoo.com> wrote: > ________________________________ Message 8 _____________________________________ Time: 06:24:01 PM PST US From: Matt Dralle Subject: Re: RV8-List: Air Ramp Cracking Duh, I meant "Wicks". At 06:06 PM 5/11/2009 Monday, you wrote: > >ACS says "3db" noise reduction, but I wonder what HP reduction? Those look pretty restrictive...? > >Matt Dralle > > >At 05:37 PM 5/11/2009 Monday, you wrote: >>They were the straight ones from Wicks: >> >>http://wicksaircraft.com/catalog/product_search_results.php/search=cGljY29sbw= >> >>I also had the edges prosealed, per the plans I think. >> >>-- >>Larry Bowen >>Larry@BowenAero.com >>http://BowenAero.com >>Sent from Welcome, NC, United States >> >>On Mon, May 11, 2009 at 8:28 PM, Craig Gallenbach <craigtxtx@yahoo.com> wrote: >> >> >>Larry, >> >>Where did you get the piccolo extensions? >> >>Craig >> >>Sent from my iPhone >> >>On May 11, 2009, at 8:10 PM, Larry Bowen <larry@bowenaero.com> wrote: >> >> >>I had the piccolo type extensions on mine. Good sound and no cracks in >>365 hours. Otherwise ramps were stock. >> >>On 5/11/09, scott bilinski <rv8a2001@yahoo.com> wrote: >> > > Matt G Dralle | Matronics | PO Box 347 | Livermore | CA | 94551 925-606-1001 V | 925-606-6281 F | dralle@matronics.com Email http://www.matronics.com/ WWW | Featuring Products For Aircraft ________________________________ Message 9 _____________________________________ Time: 06:41:33 PM PST US Subject: Re: RV8-List: Air Ramp Cracking From: Larry Bowen I gained 10 knots and fuel burn decreased 1.5 ghp. Just kidding. I put them on early, and never got around to testing. I had typical RV-8 speed numbers and had no problem keeping up with the others, so if there was a HP loss it was negligible, IMO. -- Larry Bowen Larry@BowenAero.com http://BowenAero.com On Mon, May 11, 2009 at 9:06 PM, Matt Dralle wrote: > > ACS says "3db" noise reduction, but I wonder what HP reduction? Those look > pretty restrictive...? > > Matt Dralle > > > At 05:37 PM 5/11/2009 Monday, you wrote: > >They were the straight ones from Wicks: > > > >< > http://wicksaircraft.com/catalog/product_search_results.php/search=cGljY29sbw= > > > http://wicksaircraft.com/catalog/product_search_results.php/search=cGljY29sbw= > > > >I also had the edges prosealed, per the plans I think. > > > >-- > >Larry Bowen > >Larry@BowenAero.com > >http://BowenAero.com > >Sent from Welcome, NC, United States > > > >On Mon, May 11, 2009 at 8:28 PM, Craig Gallenbach < craigtxtx@yahoo.com>craigtxtx@yahoo.com> wrote: > craigtxtx@yahoo.com>craigtxtx@yahoo.com> > > > > > >Larry, > > > >Where did you get the piccolo extensions? > > > >Craig > > > >Sent from my iPhone > > > >On May 11, 2009, at 8:10 PM, Larry Bowen < > larry@bowenaero.com> wrote: > > > larry@bowenaero.com> > > > >I had the piccolo type extensions on mine. Good sound and no cracks in > >365 hours. Otherwise ramps were stock. > > > >On 5/11/09, scott bilinski <rv8a2001@yahoo.com> > wrote: > rv8a2001@yahoo.com>rv8a2001@yahoo.com> > > > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv8-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV8-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rv8-list Browse Digests http://www.matronics.com/digest/rv8-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.