Ryan is absolutely correct that home made black powder (not smokeless, which is used in most modern firearms - that requires a little more advanced chemistry) is doable. In fact, it's a relatively common practice in hobbyist pyrotechnics. The source of the charcoal has a big impact on performance, though, so you'd have a tough time producing a consistent product. 20% variability in your muzzle velocity isn't the end of the world for a firework, but it'll string shots all over the place in a firearm (and potentially endanger your hand, if you happen to mix a batch way hotter than average). BP also tends to burn slower than smokeless, so you may run into problems trying to build enough pressure/velocity in a pistol-length barrel.
Finally, a discussion I can at least marginally contribute to! (I'm one of those hangers-on referenced in another thread - too new to 3dp to be very useful around here at the moment). I'd put home brew pistol powder in the same category as printed guns: possible, but not a great idea if you want any sort of reliability/accuracy.
Ryan is absolutely correct that home made black powder (not smokeless, which is used in most modern firearms - that requires a little more advanced chemistry) is doable. In fact, it's a relatively common practice in hobbyist pyrotechnics. The source of the charcoal has a big impact on performance, though, so you'd have a tough time producing a consistent product. 20% variability in your muzzle velocity isn't the end of the world for a firework, but it'll string shots all over the place in a firearm (and potentially endanger your hand, if you happen to mix a batch way hotter than average). BP also tends to burn slower than smokeless, so you may run into problems trying to build enough pressure/velocity in a pistol-length barrel.
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Sean - what the HELL?!?!? No need to apologize - not at all! Your comments were perfectly inline with those of Ryan. And, of course, Ryan is a bit of a "Big Wig" around these parts. Hell - he wrote the book on 3D Printing. Well, OK - he wrote A book. I can't wait to get my hands on it. Rumor is - there may be a Pic if some dude's Big Ass Dragon project in there! Oh wait - that's MY Dragon...
;-)
-K-
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(Apologies if I strayed too far from the purpose of this group - I've been desperately looking for a way to contribute, and may have gotten a little overly excited to talk about something within my wheelhouse)
On Wed, Oct 10, 2018 at 2:33 PM Sean C <sean.c...@gmail.com> wrote:
Finally, a discussion I can at least marginally contribute to! (I'm one of those hangers-on referenced in another thread - too new to 3dp to be very useful around here at the moment). I'd put home brew pistol powder in the same category as printed guns: possible, but not a great idea if you want any sort of reliability/accuracy.
Ryan is absolutely correct that home made black powder (not smokeless, which is used in most modern firearms - that requires a little more advanced chemistry) is doable. In fact, it's a relatively common practice in hobbyist pyrotechnics. The source of the charcoal has a big impact on performance, though, so you'd have a tough time producing a consistent product. 20% variability in your muzzle velocity isn't the end of the world for a firework, but it'll string shots all over the place in a firearm (and potentially endanger your hand, if you happen to mix a batch way hotter than average). BP also tends to burn slower than smokeless, so you may run into problems trying to build enough pressure/velocity in a pistol-length barrel.
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And as an aside to the ITAR thing.. you can email an ITAR-rated document, but I wouldn't.. because you are still on the hook for an illegal export if somehow that email gets accessed by a foreign national. It's also a no-no to provide a FORNAT with an ITAR-rated document that's freely available online, like on Wikileaks or a torrent tracker. I was given this tidbit by the security chief at my defense-contractor employer when we gave our customers some military documents I'd dug up with google. The documents I provided were OK, but I was advised not to share the link because other files on the same site were not exportable. In general, be super paranoid when dealing with ITAR and you'll usually be OK.
https://www.bbc.co.uk/news/amp/newsbeat-48695173
It was only going to be a matter of time and will need to remember to see what sentance he recieves in August!
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Wow. Note the "gun" needed a metal tube before it was fireable. Never seen that design before.