Michael,
The alum. acft. ribs w/ which I am familiar have flanged lightening
holes...the pre-formed flange functioning as a web stiffener. You are
of course correct w/ regard to loads being "negligible" in this area.
Fred
A194
On Sunday, September 24, 2006, at 09:37 AM, Michael Grass wrote:
> <M.Grass@comcast.net>
>
> I question this because I believe (and not know) that the middle
> portion of the rib is only caring negligible loads. This is where our
> friends in the flying aluminum cans cut there holes to make the
> structure more lightweight.
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