"Kevin Brooks" wrote in message
...

"John Keeney" wrote in message

125 feet? Heck, if you can deliver them accurately a handful of GBU-28s
should take care of the problem. Granted, the hole wouldn't start out
that
big between the water pressure and the fracturing around the hole I
expect
that problem would get bigger quickly enough.
Now, could Taiwan deliver them (or a local equivalent), that could well
be an issue.

First, Taiwan has no -28 delivery capability; the USAF limits such weapons
to deployment on B-2's and F-15E's, IIRC. Secondly, GBU-28 penetration in
concrete is about 20 feet from what I have read (the over 100 feet number
is
an earthen penetration. So don't be expectin' to punch many neat little
holes with it in such a structure.

I was thinking along the lines of multiple hits in the same location.
If the first bomb penetrates 20 feet it will also crater x more feet
and fracture y more feet softening the remaining concrete. I
would be kind of surprised if three well placed GBU-28s couldn't
penetrate a hundred feet of reinforced concrete damn, four I would
think a near certainty.
I doubt we've provided GBU-28s to too many folks around the world
but it's not exactly a design concept cloaked in secrecy and mystery.
Taiwan should be able produce a comparable design scaled for their
delivery capability; assuming of course they HAVE a system capable
of making it that far inland. Uh, how far exactly would that be?