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- Path: sparky!uunet!paladin.american.edu!darwin.sura.net!dtix!mimsy!gatech.edu
- From: ke4zv!gary@gatech.edu (Gary Coffman)
- Newsgroups: rec.guns
- Subject: Re: explosives question
- Message-ID: <1992Nov19.063850.15543@ke4zv.uucp>
- Date: 19 Nov 92 15:15:22 GMT
- Sender: magnum@mimsy.umd.edu
- Organization: Gannett Technologies Group
- Lines: 40
- Approved: gun-control@cs.umd.edu
-
- In article <1992Nov13.194031.7648@news.yale.edu> watt-alan@net.yale.edu (Alan Watt) writes:
- #In article <--fqrs+@dixie.com>, jgd@dixie.com (John De Armond) writes:
- #|> From my handy-dandy gen-u-wine government issued atomic bomb blast
- #|> computer, a 1 kt device will produce the following overpressure
- #|> contours for a surface burst:
- #|>
- #|> Maximum Dynamic Pressure radius
- #|> 1 psi 0.24 mile
- #|> 3 psi 0.17 mile
- #|> 5 psi 0.14 mile
- #|>
- #|> This is for flat, unobstructed terrain. For typical urban terrain,
- #|> large structural damage (buildings down) would likely be limited to a block
- #|> or two.
- #
- #I'll cheerfully admit to near total ignorance regarding things that go
- #bang! *really* loud, but I thought the standard doctrine for nukes was
- #an aerial blast. At least one of the U.S. bombs used on Japan was an
- #aerial blast device. I assume this is to increase the radius over which
- #adequate overpressure occurs.
-
- Both devices, 20 kT yield, were fused for a 2,000 foot AGL detonation.
- That was calculated to deliver the widest blast *and* thermal pulse effect
- on the soft target. Remember that a Japanese city of the time was largely
- rice paper construction. For hardened targets, ground burst, or even
- penetrator devices are used. In a typical American high rise city core,
- a ground burst will have it's energy channelled by the street grid. The
- focused shock will travel longer distances down radial streets and cause
- extensive damage further away and in "freak" patterns.
-
- Ted Taylor, the premier US A-bomb designer, in _The Curve of Binding Energy_
- states that a 10 kt device detonated in an office halfway up one of the
- towers of the World Trade Center in NYC would make a stump of that tower,
- but would be unlikely to knock down it's twin unless the first tower fell
- against it. Tom Clancy, in _The Sum of All Our Fears_, describes a "squib"
- device of a few kT exploding next to Denver's football stadium. His
- description of the blast effects is fairly accurate, though his satellite
- shutdown scenario is dubious at best.
-
- Gary
-