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ferrerg(at)comcast.net Guest
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Posted: Tue Sep 23, 2008 5:38 am Post subject: Air Box Mounting Plate |
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The last two times that I did my conditional inspection I found that my air box mounting aluminum plate was cracked.
The first time I made a new mounting plate and tried to eliminate as many stress risers as I could. But it cracked again.
This time I'm having a machine shop cut the rear hole behind the carburetor air intake (needed to clear the rear part of the carburetor) with a water cutting tool.
I'm hoping that a smoother cut will prevent stress risers.
Does anyone have any suggestions that may prevent the cracking?
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Gabe A Ferrer
RV6 N2GX
South Florida's Treasure Coast
email: ferrerg(at)comcast.net
cell: 561 758 8894
[quote][b]
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Dale Ensing
Joined: 11 Jan 2006 Posts: 571 Location: Aero Plantation Weddington NC
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Posted: Tue Sep 23, 2008 5:46 am Post subject: Air Box Mounting Plate |
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Do you have adequate flexibility/movement at the airbox snout/cowl inlet seal to minimize stress on the airbox plate when there is movement of the engine?
Dale Ensing
[quote] ---
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_________________ Dale Ensing
RV-6A
Aero Plantation
Weddington NC |
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pitts_pilot(at)bellsouth. Guest
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Posted: Tue Sep 23, 2008 5:56 am Post subject: Air Box Mounting Plate |
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ferrerg(at)comcast.net wrote:
Quote: | The last two times that I did my conditional inspection I found
that my air box mounting aluminum plate was cracked.
The first time I made a new mounting plate and tried to eliminate as
many stress risers as I could. But it cracked again.
This time I'm having a machine shop cut the rear hole behind
the carburetor air intake (needed to clear the rear part of
the carburetor) with a water cutting tool.
I'm hoping that a smoother cut will prevent stress risers.
Does anyone have any suggestions that may prevent the cracking?
You might try getting the prop dynamically balanced to reduce the
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vibration. Water cutting will still leave small knicks that will
(could?) start to crack. A fine file followed by emery cloth to make it
smooth is good prevention.
Linn
do not archive
Quote: | --
Gabe A Ferrer
RV6 N2GX
South Florida's Treasure Coast
email: ferrerg(at)comcast.net
cell: 561 758 8894
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n223rv(at)wolflakeairport Guest
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Posted: Tue Sep 23, 2008 6:19 am Post subject: Air Box Mounting Plate |
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We made our second one out of 0.090 material....
From: ferrerg(at)comcast.net
Sent: Tuesday, September 23, 2008 9:37 AM
To: RV List <rv-list(at)matronics.com>
Subject: RV-List: Air Box Mounting Plate
The last two times that I did my conditional inspection I found that my air box mounting aluminum plate was cracked.
The first time I made a new mounting plate and tried to eliminate as many stress risers as I could. But it cracked again.
This time I'm having a machine shop cut the rear hole behind the carburetor air intake (needed to clear the rear part of the carburetor) with a water cutting tool.
I'm hoping that a smoother cut will prevent stress risers.
Does anyone have any suggestions that may prevent the cracking?
--
Gabe A Ferrer
RV6 N2GX
South Florida's Treasure Coast
email: ferrerg(at)comcast.net
cell: 561 758 8894
[quote]
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matronics.com/contribution
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| - The Matronics RV-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:
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carl.froehlich(at)cox.net Guest
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Posted: Tue Sep 23, 2008 1:47 pm Post subject: Air Box Mounting Plate |
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I had two plates crack on my 8A. I modified the cowl intake (more forward) and have a scat hose connection to the airbox. I assumed the added weight of the hose was causing the problem.
I made a plate out of .032” stainless steel – problem solved.
Carl Froehlich
RV-8A (450 hrs)
RV-10 (fuselage)
From: owner-rv-list-server(at)matronics.com [mailto:owner-rv-list-server(at)matronics.com] On Behalf Of Michael Kraus
Sent: Tuesday, September 23, 2008 10:18 AM
To: rv-list(at)matronics.com
Subject: RE: Air Box Mounting Plate
We made our second one out of 0.090 material....
From: ferrerg(at)comcast.net
Sent: Tuesday, September 23, 2008 9:37 AM
To: RV List <rv-list(at)matronics.com>
Subject: Air Box Mounting Plate
The last two times that I did my conditional inspection I found that my air box mounting aluminum plate was cracked.
The first time I made a new mounting plate and tried to eliminate as many stress risers as I could. But it cracked again.
This time I'm having a machine shop cut the rear hole behind the carburetor air intake (needed to clear the rear part of the carburetor) with a water cutting tool.
I'm hoping that a smoother cut will prevent stress risers.
Does anyone have any suggestions that may prevent the cracking?
--
Gabe A Ferrer
RV6 N2GX
South Florida's Treasure Coast
email: ferrerg(at)comcast.net
cell: 561 758 8894
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