On Mon, 3 Feb 2003 07:26:10 +0100, Hans Ulrich Ammann
<[EMAIL PROTECTED]> wrote:

>Im trying to get a feeling of how damaging a chunk of isolation could
>be. But eventually one has to consider that most of the mass of a torn
>of piece of insulation could consist of frozen moisture. In the moment
>a piece of insulation gets loose it has the same velocity as the whole
>vehicle, how important would be the relative velocity at the moment it
>would impact on the orbiter?

I heard it broke loose about a minute into the launch.  At that point,
they're still in the stratosphere, but supersonic.  A piece of
ice-coated insulation would be very draggy, and would pull several
hundred g.  It would have been essentially stopped by the time the
wing hit it at Mach 1+.  Ouch.

I never took the insulation strike hypothesis very seriously before,
but ice at Mach 1+ would do enough damage to make that scenario
credible.  Ouch again, and damn.

-R

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