bombardment --Weight of ships

  Hello all! I am coming along with my research on bombardment and aside
from trying to nail down a good dynamic for air friction my research so far
supports the notion that it is an effective weapon ( I can tell whether or
not a given object reached terminal velocity but I have not been able to
track its exact velocity at impact yet except in vacuum conditions.) Paper
pending.

       If anyone is interested I have a perl program that I could make
available that reports time taken, energy at impact , blast approximation
and crater size estimations... For heights below 100ft this may be
inaccurate but is based on papers from NASA and the National Geological
Survey it also reports final net acceleration, a negative number indicates
that the object already reached terminal velocity and the above data are not
accurate... This Friction dynamic also assumes that the air is the same
density from sea-level to the altitude that the projectile is launched.

  Anyway, I thought hmm if all this is so impressive what does a ship
crashing to ground do?  So I ask what % weight would a ship possess compared
to a solid block of wood encompassing the same volume?

                                  --Steve