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From: Tony.Williams@quarry.nildram.co.uk (Tony Williams)
Newsgroups: sci.military.moderated
Subject: Re: RHA penetration of 25mm M919 from M242 Bushmaster?
Date: 28 Mar 2002 20:09:23 -0800
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TTK Ciar wrote in message
news:...
> Hello,
> I was wondering if anyone knew what the penetration capability was,
> in RHA equivalence, of the 25mm M919 APFSDS when fired from the M242
> Bushmaster chain gun.
The only relevant data I have is for the Oerlikon Contraves APFSDS
round, which penetrates 37mm/1,000m/60 degrees (armour type
unspecified).
> Also, as an aside, does using RHA equivalence work very well? That
> is to say, if a given KE penetrator is known to penetrate "X" mm of
> RHA, and a given composite armor is considered to equate "Y" mm of
> RHA, then will all penetrators for X > Y penetrate that armor? Or do
> different kinds of KE penetrators have potentially radically nonlinear
> penetration characteristics (more than 10% margin of error? 20%?)
> depending on the kind of composite armor? Do you never really know
> until you can test the munition against that armor, or does the RHA
> equivalence arithmetic come pretty close?
I believe that any "RHA equivalence" figure is likely to be an
average, and that different types of ammunition will perform
differently depending on the composition of the armour, but I have no
data to support that.
Tony Williams
Author: "Rapid Fire: The development of automatic cannon, heavy
machine guns and their ammunition for armies, navies and air forces"
Details on my military gun and ammunition website:
http://www.quarry.nildram.co.uk
Military gun and ammunition discussion forum:
http://forums.delphiforums.com/autogun/messages/