Today's Message Index:
----------------------
1. 06:44 AM - Chat Reminder (George Race)
2. 08:31 AM - 601 Upgrade Question (John Davis)
3. 12:04 PM - Re: 601 Upgrade Question (Davcoberly@wmconnect.com)
4. 12:48 PM - Re: 601 Upgrade Question (John Davis)
5. 02:22 PM - Re: 601 Upgrade Question (Davcoberly@wmconnect.com)
6. 02:54 PM - Re: 601 Upgrade Question (Davcoberly@wmconnect.com)
Message 1
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Message 2
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| Subject: | 601 Upgrade Question |
Hello All,
I'm working on adding the upgrade to my center section and have a
question after talking with an A&P buddy helping me out. Its concerns
the rivets on the top of the center section top double (6-zu-2-1) and
the front ctr web spar (6-w-4-1) and the old rivet line in 6-w-4-1.
Since the distance between the two halves of the center section has
increased my question is should I drill a new rivet line from 6-zu-2-1
into 6-zu-2-2 which will be slightly off from the old rivet line in the
rear web section ? If I do then then there will be effectively elongated
(old plus new) holes thru the rear center section which is of course
sandwiched between 6-zu-2-1 and 6-zu-2-2. My A&P says this will lead to
cracking. If you keep the existing rivet line however it seems it will
be over the radius of the rear center section though ?
How did other folks handle this.
Hopefully this makes sense,
Thanks in Advance,
John Davis
N601JD - 601XL/Jab 3300
7A8 - Avery County Airport, Spruce Pine, NC
Message 3
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| Subject: | Re: 601 Upgrade Question |
My read on this is they want you to back drill through the old holes in the
6-ZU-2-2 into 6-ZU-2-1 which just clips the edge of the old holes under the
6-ZU-2-1 then add a rivet in between each of those for a pitch on 20mm. You
will have the same problem on the forward part of the carry through to the
floor also.
David Coberly
Message 4
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| Subject: | Re: 601 Upgrade Question |
Hi David,
Right, that was my take as well but my A&P buddy doesnt like the fact
that the new rivets clip the edge of the old holes, he says that can
cause stress cracks on and around the rivets going thru the larger holes.
Thanks for your feedback,
John
On 4/12/2010 3:02 PM, Davcoberly@wmconnect.com wrote:
> --> Zenith-List message posted by: Davcoberly@wmconnect.com
>
> My read on this is they want you to back drill through the old holes in the
> 6-ZU-2-2 into 6-ZU-2-1 which just clips the edge of the old holes under the
> 6-ZU-2-1 then add a rivet in between each of those for a pitch on 20mm. You
> will have the same problem on the forward part of the carry through to the
> floor also.
> David Coberly
>
>
>
Message 5
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| Subject: | Re: 601 Upgrade Question |
John,
At least the part that is double drilled is just really used as a spacer
between two thicker pieces I don't really think it would cause a problem if it
did have some cracking. This whole thing is somewhat of a compromise
between what is correct and how were doing it. David Coberly
Message 6
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| Subject: | Re: 601 Upgrade Question |
John,
Another thing I just finished riveting my carry through spar today and used
solid rivets on every rivet on it because I had enough extra in a bucket of
rivets I have. When I took it out I weighed it and when I finished it I
weighed again and it gained just over 4 lbs FYI. David
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