[AR] Re: FW: Balls, AP or other chemicals
- From: Peter Fairbrother <zenadsl6186@xxxxxxxxx>
- To: arocket@xxxxxxxxxxxxx
- Date: Tue, 21 Jul 2015 14:27:33 +0100
On 21/07/15 12:02, Peter Fairbrother wrote:
On 21/07/15 02:15, Troy Prideaux wrote:
*Peter – I think the 2^nd attachment [WHATHEND.DOC] is the one.*
From: Chuck Piper [
mailto:cpiper@xxxxxxxxx]
Sent: Friday, 16 September 2011 10:27 AM
To: Troy Prideaux
Subject: RE: Balls, AP or other chemicals
Here are the manuscripts for the two articles I wrote for the Crash and
burn edition of HPR magazine
Had a chance to read it: good stuff, mostly sensible, but there were
some tests they didn't do (and the science got caught up in legal
wrangling about responsibility).
A theory:
When AP is heated, it decomposes at about 230C, and then, if the
temperature does not rise too much, something funny happens - it stops
decomposing. Only about 30% of the AP decomposes, the rest is stable at
230C. Nobody knows why this happens.
The result is nearly-pure AP, with substantially the same volume - but
hot, with smaller particle size, and 30% less density - and we know that
each of hotness, smaller particle size and lower density makes AP easier
to detonate or DDT.
If some large vented metal containers in close proximity containing AP
were heated for 20 minutes, the outside parts of the AP might contain
this hot, small particle, less dense material. The inner parts of the AP
in the center of the drums might also be hot, through gas heating.
If there is a fast deflagration in one of the drums, which ruptures,
sending the drum wall at high speed into the wall of a nearby drum, the
easily-detonatable material at the outside of the second drum might
detonate, causing the material in the center of the drum to detonate as
well.
And thus the transformation from deflagration to detonation (which
undoubtedly happened - several times).
Just a theory, would need experimental testing. E.g. start by heating
some 200 micron AP to 230C and measuring the minimum detonation radius.
-- Peter Fairbrother
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