-Z- (z@gundam.com)
Mon, 12 Jun 2000 18:47:56 -0700

> -----Original Message-----
> From: owner-gundam@1u.aeug.org [mailto:owner-gundam@1u.aeug.org]On
> Behalf Of Blackeagle
> Sent: Monday, June 12, 2000 01:09
> To: gundam@aeug.org
> Subject: RE: [gundam] GP-02A's Mk. 82 nuke warhead

> Yeah. Though I wonder why they went with the Fat Man design rather than the
> more cylindrical Little Boy.

They represent two completely different approaches to creating a critical mass.

The Little Boy is a "shotgun" design -- a tube with a subcritical mass at the
end and in the middle, with a chemical explosive charge that shoots one mass
into the other.

The Fat Man is an "implosion" design -- several wedge-shaped subcritical masses
are arranged in a spherical array and simultaneously imploded into a spherical
critical mass by shaped charged studded around the outer surface.


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