 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
john(at)roadmapscoaching.
Guest
|
 Posted: Wed Jun 04, 2008 5:31 am Post subject: J Channel & Bulkheads |
 |
|
I have had an interesting comment by both an A&P and and RV6 builder while looking over my plane. They pointed out that in the tailcone the edges of the J channels touch the bulkhead cutouts. They were concerned that the contact under vibration could create a crack in the bulkheads. They both suggested that I bend the J channel edges down to prevent the contact. This seems like a lot of work (especially in the tight tailcone). I am wondering if anyone else has been concerned about this or has bothered to bend J channels. Is there a building standard about contact between parts like this?
John Testement
jwt(at)roadmapscoaching.com (jwt(at)roadmapscoaching.com)
40321
Richmond, VA
Painting and final assembly
[img]cid:201144612(at)04062008-1D50[/img]
| | - The Matronics RV10-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:
http://www.matronics.com/Navigator?RV10-List |
|
| Description: |
|
| Filesize: |
27.31 KB |
| Viewed: |
209 Time(s) |
|
| Description: |
|
| Filesize: |
27.31 KB |
| Viewed: |
220 Time(s) |
|
|
|
| Back to top |
|
 |
pitts_pilot(at)bellsouth.
Guest
|
| Posted: Wed Jun 04, 2008 6:14 am Post subject: J Channel & Bulkheads |
|
|
That's a tough one! In my mind (may not be a good thing  ) any wear will become an 'interference fit' and won't be sharp-edged. The wear pattern would be smooth, like a fine file. and wouldn't be a source of stress cracks. If there was pressure to the face of the bulkhead, then I may see it a little differently. A little, little differently. Your buddy has good eyes, though!!!
Linn YMMV
do not archive
John Testement wrote: [quote] I have had an interesting comment by both an A&P and and RV6 builder while looking over my plane. They pointed out that in the tailcone the edges of the J channels touch the bulkhead cutouts. They were concerned that the contact under vibration could create a crack in the bulkheads. They both suggested that I bend the J channel edges down to prevent the contact. This seems like a lot of work (especially in the tight tailcone). I am wondering if anyone else has been concerned about this or has bothered to bend J channels. Is there a building standard about contact between parts like this?
John Testement
jwt(at)roadmapscoaching.com (jwt(at)roadmapscoaching.com)
40321
Richmond, VA
Painting and final assembly
[b]
| | - The Matronics RV10-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:
http://www.matronics.com/Navigator?RV10-List |
|
|
|
| Back to top |
|
|
seipel(at)seznam.cz
Guest
|
| Posted: Wed Jun 04, 2008 6:38 am Post subject: J Channel & Bulkheads |
|
|
I noticed it during construction and filed the holes in the bulkheads a
little bigger so they didn't touch. Not sure if it is/was necessary though.
PJ Seipel
RV-10 #40032
John Testement wrote:
| Quote: | I have had an interesting comment by both an A&P and and RV6 builder
while looking over my plane. They pointed out that in the tailcone the
edges of the J channels touch the bulkhead cutouts. They were
concerned that the contact under vibration could create a crack in the
bulkheads. They both suggested that I bend the J channel edges down to
prevent the contact. This seems like a lot of work (especially in the
tight tailcone). I am wondering if anyone else has been concerned
about this or has bothered to bend J channels. Is there a building
standard about contact between parts like this?
John Testement
jwt(at)roadmapscoaching.com <mailto:jwt(at)roadmapscoaching.com>
40321
Richmond, VA
Painting and final assembly
Checked by AVG.
6/3/2008 7:00 AM
------------------------------------------------------------------------
|
| | - The Matronics RV10-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:
http://www.matronics.com/Navigator?RV10-List |
|
|
|
| Back to top |
|
|
Tim Olson
Joined: 25 Jan 2007
Posts: 2879
|
| Posted: Wed Jun 04, 2008 3:50 pm Post subject: J Channel & Bulkheads |
|
|
If you bend the J-channel, it will lose strength. The best way to
fix it is to file some gap into the bulkhead cutouts and then deburr
it. Yes, it's a lot of work, but the person/people who told you they
were worried about cracking are correct. Letting things "wear in"
just isn't right.
Tim Olson - RV-10 N104CD - Flying
do not archive
John Testement wrote:
| Quote: | I have had an interesting comment by both an A&P and and RV6 builder
while looking over my plane. They pointed out that in the tailcone the
edges of the J channels touch the bulkhead cutouts. They were concerned
that the contact under vibration could create a crack in the bulkheads.
They both suggested that I bend the J channel edges down to prevent the
contact. This seems like a lot of work (especially in the tight
tailcone). I am wondering if anyone else has been concerned about this
or has bothered to bend J channels. Is there a building standard about
contact between parts like this?
John Testement
jwt(at)roadmapscoaching.com <mailto:jwt(at)roadmapscoaching.com>
40321
Richmond, VA
Painting and final assembly
Checked by AVG.
6/3/2008 7:00 AM
------------------------------------------------------------------------
|
| | - The Matronics RV10-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:
http://www.matronics.com/Navigator?RV10-List |
|
|
|
| Back to top |
|
|
toaster73(at)embarqmail.c
Guest
|
| Posted: Thu Jun 05, 2008 2:51 pm Post subject: J Channel & Bulkheads |
|
|
I'd second that. I found numerous instances of this contact. I even tested
it on a scrap piece by running it back and forth. Al to Al can produce an
edge on either piece bulkead or channel. I sometimes bent the channel just
enough to clear parts if it was only slight or I filed the bulkhead cutout
back some (rounded it out.).
In a couple instances I filed the edge of the j-channel down a little in a
clean large radius fashion. I saw this contact on the wings too.
To me over time the contact would fret and create a groove the width of the
j-channel stock. I was not comfortable with such a small radius groove.
-Chris Lucas
#40072 (home made overhead console mold and wiring)
---
| | - The Matronics RV10-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:
http://www.matronics.com/Navigator?RV10-List |
|
|
|
| Back to top |
|
|
|
|
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
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
