Ubehage Posted April 23, 2015 Share Posted April 23, 2015 I'm about to make a new batch of BP, intended for lift and small salutes.For that purpose, I would like my granules to burn as fast and violent as possible. To my experience, it all comes down to BP-grain size:Small grains gives a more steady burnrate, where larger grains have more surface to ignite at once. So, I was wondering if anyone here had experience with the optimal size for BP-granules? Link to comment Share on other sites More sharing options...
BurritoBandito Posted April 23, 2015 Share Posted April 23, 2015 Actually, the smaller the grain size is, the more surface area that's exposed at once. Meaning a smaller grain will release its energy more rapidly. 1 Link to comment Share on other sites More sharing options...
FlaMtnBkr Posted April 23, 2015 Share Posted April 23, 2015 That is true to a point. Too small and the spaces between grains that are the path for fire get choked and slows down. I have never experimented with grain sizes and speed but I would think -12+20 mesh would be a pretty optimal cut. 1 Link to comment Share on other sites More sharing options...
Niladmirari Posted April 26, 2015 Share Posted April 26, 2015 1 Link to comment Share on other sites More sharing options...
schroedinger Posted April 26, 2015 Share Posted April 26, 2015 For what you want to do, i would take 20 to 40 mesh. 1 Link to comment Share on other sites More sharing options...
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