[rollei_list] Re: I'm back!

  • From: Jerry Lehrer <jerryleh@xxxxxxxxxxx>
  • To: rollei_list@xxxxxxxxxxxxx
  • Date: Thu, 06 Jul 2006 19:33:31 -0700

Kieth,

Yes, but just because we are aware of the problem does not mean
that we have the problem covered.  The more exotic materials we
use, the tougher are the problems.

Jerry

keith_w wrote:

> Jerry Lehrer wrote:
> > Kieth,
> >
> > Naw!  What he really means is that the main wing spar has the web made of
> > aluminium and the spar caps are made of a different metal.  This leads to
> > bi-metallic corrosion in which the least anodic metal is corroded away.
> >
> > Probably Don could explain it better, as I just had 3 Margaritas and might
> > have difficulty explaining metallurgical problems.
> >
> > Glad to hear from Don again.
> >
> > Jerry
>
> Ahhh, galvanic corrosion. Of all people, you'd think airframe designers would
> have that covered from day one!
>
> keith whaley
>
> > keith_w wrote:
> >
> >> Don Williams wrote:
> >> [...]
> >>
> >>> Turns out that the main spar in those machines is bi-metal and they
> >>> self-destruct over time and have to be completely replaced for a safe
> >>> rebuild.
> >> "Bi-metal?" Please explain, Don.
> >>
> >> the only bi-metal I know is in a thermostat!  ;-)
> >>
> >> keith
>
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