Today's Message Index:
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0. 12:22 AM - Reminder (Matt Dralle)
1. 06:23 AM - Re: Re: Center Section progress (Scott Knowlton)
2. 08:14 AM - Re: Center Section progress (Bill Church)
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Dear Listers,
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| Subject: | Re: Center Section progress |
Hmmm good call. Of course now my cabane fittings are powder coated but I s
uppose the fabric will make inspecting for cracks difficult anyway. Someho
w I have faith in those with the thickness of the 4130 and the professional
tig welds my friend carried out. Also they arent as exposed to vibration
like the engine mount. I have a few hours this morning so I am going to st
art cutting metal for my control system. Looks like a fun project.
Scott
> Subject: Pietenpol-List: Re: Center Section progress
> From: billspiet@sympatico.ca
> Date: Tue=2C 8 Nov 2011 14:31:05 -0800
> To: pietenpol-list@matronics.com
>
ca>
>
> One thing to keep in mind about powdercoating is that=2C while it is very
durable=2C it is also flexible=2C and can sometimes hide cracks in the met
al underneath the paint. For this reason it is probably best to avoid powde
rcoating critical structural components (like the motor mount)=2C and just
use a good enamel paint instead. Should a crack develop in the one of these
parts=2C the enamel paint will also crack=2C making it easier to detect.
>
> Bill C.
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=357254#357254
>
>
>
>
>
>
>
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| Subject: | Re: Center Section progress |
The cabane fittings should be just fine. First off, they do not even carry much
load, and secondly, the welds are not really structural, since the fittings are
comprised of a channel inside another channel, and the welds are primarily
just to hold the two parts in place relative to each other. If those welds were
to fail completely, they still would not come apart.
As you say, the welds were professionally done, and will not be subject to vibration,
so cracking is not likely at all.
I'd really only give some thought to the major load carrying parts like the motor
mount, lift struts, etc., where a failure would be catastrophic.
Bill C.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=357351#357351
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