Re: [APML] A mount of dilemma

[lbanbury <lbanbury@sonic.net>]

Brian - Thanks. You got my curiosity up because in a previous life I
used to test helicopter parts and helicopters for static and fatigue
failures. The picture looks like a simple tear out, but sometimes a
small crack will propagate quite rapidly under the right conditions.
Loren

Brian Larmay wrote:
> 
> Hi Loren,
> 
> Its pot metal...very porous...lottsa bubbles.
> I remember working as an inspector at a die casting company and doing
> porosity checks to make sure there werent any bubbles or at leaste try to
> get the leaste amount for Ford manifolds and such.
> So having that knowledge behind me, it was the first thing I looked for in
> the threads when I first bought it.
> I can imagine if I cut through it, I would be even more disapointed.
> 
> Whoever set the standards on these mounts did not care very much what went
> through as far as being porous.
> 
> Ill take a pic tomorrow of it and post it on the page....my quick cam doesnt
> give the greatest resolution in this artificial light for some reason.
> Im also going to contact Orion and see if I can get a spare.
> 
> > Brian - could you get a detailed close-up of the failed edges. I am
> > curious to see if there is evidence of a fatigue crack or if it just
> > yielded out due to load. Also is it aluminum or pot metal??
> > Loren Banbury
> >
> > Jim Ives wrote:
> > >
> > > Brian what kind of mount is it?  i can't tell by the photo.
> > >     Maybe I should add this to my "what can go wrong" page!
> > > http://flyboy999.freeyellow.com/LinksPage/WhatCanGoWrongWill.htm
> > >
> > > Jim Ives
> > >
> > > ----- Original Message -----
> > > From: "Brian Larmay" <astrobri@ameritech.net>
> > > To: <astro-photo@seds.org>
> > > Sent: Thursday, February 27, 2003 10:19 PM
> > > Subject: [APML] A mount of dilemma
> > >
> > > > Heres what happened to me tonight:
> > > > http://www.astrobri.com/things_that_can_go_wrong.htm
> > > >
> > > > Brian
> > > >
> > > >
> > > > ---
> > > > Outgoing mail is certified Virus Free.
> > > > Checked by AVG anti-virus system (http://www.grisoft.com).
> > > > Version: 6.0.456 / Virus Database: 256 - Release Date: 2/18/03
> > > >
> > > > _______________________________________________
> > > > Astro-Photo mailing list
> > > > Astro-Photo@seds.org
> > > > http://seds.org/mailman/listinfo/astro-photo
> > > >
> > >
> > > _______________________________________________
> > > Astro-Photo mailing list
> > > Astro-Photo@seds.org
> > > http://seds.org/mailman/listinfo/astro-photo
> > _______________________________________________
> > Astro-Photo mailing list
> > Astro-Photo@seds.org
> > http://seds.org/mailman/listinfo/astro-photo
> 
> ---
> Outgoing mail is certified Virus Free.
> Checked by AVG anti-virus system (http://www.grisoft.com).
> Version: 6.0.456 / Virus Database: 256 - Release Date: 2/18/03
> 
> _______________________________________________
> Astro-Photo mailing list
> Astro-Photo@seds.org
> http://seds.org/mailman/listinfo/astro-photo
_______________________________________________
Astro-Photo mailing list
Astro-Photo@seds.org
http://seds.org/mailman/listinfo/astro-photo