[AR] Re: Amateur thermoplastic binder solids
- From: Henry Spencer <hspencer@xxxxxxxxxxxxx>
- To: Arocket List <arocket@xxxxxxxxxxxxx>
- Date: Wed, 8 Jul 2020 17:19:21 -0400 (EDT)
On Wed, 8 Jul 2020, William Claybaugh wrote:
My sources say AP ignites a little above 400 degrees F so a binder that
forms a low viscosity fluid at around the BP of water will in theory
work fine if there is no possibility of hot spots.
If you can find something that works *at* the boiling point of water, you
can use steam heat (with a steam source that heats the water, not the
steam) to ensure it just can't go any hotter.
(This technique is, or was -- my info may be out of date -- widespread for
filling munitions with TNT, which is a fairly-stable liquid at 100degC.
That helpful property is one reason why TNT became so popular.)
If I were going in that direction I would want to automate the mixing
rather than stand over an open pot of hot binder, AP, and Al, stirring.
If one must pre-fix fuel and oxidizer :-), especially hot, doing it from a
distance makes a whole lot of sense.
Henry
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