RE: GEV RVs

To give an example of how soil can effect the charge, we tried to use a
shape 
charge to "dig" our hole for a cratering charge in the Mojave (FT
Irwin).  Blew 
a nice clean hole @ 2' in diameter, the cratering charge is @ 6" in
diameter. 
 The "book" said it should work.

Michael Brown

-----Original Message-----
From:	John Atkinson
Sent:	Sunday, April 14, 2002 5:02 PM
To:	gzg-l@csua.berkeley.edu
Subject:	Re: GEV RVs

--- Laserlight <laserlight@quixnet.net> wrote:
> > Well, for a tank it'd be a two-stage problem.
> First
> > holes, which needs shaped charges.
>
> Thermite grenade?  IIRC the US troops in winter 1944
> dug foxholes in

Not foxholes for tanks.

A hasty fighting position for an M1 tank should be 32'
long, 18' wide, and 9' deep.  This is a non-trivial
problem.

4 holes, 60lbs of explosive each.  Holes would be dug
with 40lb shaped charges (48" standoff produces a 7'
hole 14.5" diameter).  That's a modification of the
setup for a deliberate road crater, with the holes
evened out to level the bottom of the crater.  That's
400lbs plus priming.

As near as I can tell, that'll still be a bit narrow
and might need some fine-tuning with a bit more bang.
Oh, and the sides will be a bit steep for the tanks to
roll in and out.  Maybe another one or two hundred lbs
for fine-tuning.

That's a rough estimate, and would be thrown off by
the quality of the soil and other environmental
factors.  Permafrost would mean you'd need at least
twice the amount of explosives.

I wouldn't want to do it in combat without verifying
some of my guesses.

John

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