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Silver Wire
Just for Scott:
(thanks to Darren@Loki for the hookup!) Wires can be used to increase the bulk burning rate of a propellant by conducting heat deep into the burning surface. I did a literature review and gave a talk on the historical applications of this technology a while back, so I’ve got no excuse not to try it. Paper and presentation video after the jump.
Download the PDF of the report: Wire Enhancement of Burning Rates
David,
Beware. That stuff can make your propellant flow like a cats hair ball! I only tried it in one formula once, so I can’t comment on how well the silver wire works. As a matter of fact, I still have a lot of those grains left to burn still.