frogy Posted October 7, 2007 Posted October 7, 2007 The small mortar is the one that didn't shoot right? I made a small cake like with with (4) 1" pvc pipes shooting ~12 gram 3/4" ID aerial salutes... The 1" PVC pipes were fitted directly into a 2x4 board (hole saw drilled groves for pipes to be secured into... I had a small barrier wall made from masonry bricks... none exploded, but It was only a one time thing since I see what my 10 gram 1.75" HDPE firecracker did... couldn't imagine a 12 gram in 1" PVC...
flying fish Posted October 7, 2007 Posted October 7, 2007 Yeah, the short one broke low. I was using very poor quality BP in this case, so I wasn't able to sufficiently compensate by adding more powder. Though it broke even lower than I thought it would.
crazyboy25 Posted October 7, 2007 Posted October 7, 2007 ohhhhh so they are mini aerial shells made out of m-80 casings
mormanman Posted October 7, 2007 Posted October 7, 2007 Where do you guys get mortor tubes? Do you roll them and how do you reload them? and make lift cups?
Mumbles Posted October 7, 2007 Posted October 7, 2007 Oh yeah, they get rolled with the decorative wrap around the outside. It adds a ton of strength. Seriously kid. Are you fucking retard or something??? Most of those questions answer themselves.
mormanman Posted October 7, 2007 Posted October 7, 2007 Oh yeah, they get rolled with the decorative wrap around the outside. It adds a ton of strength. Seriously kid. Are you fucking retard or something??? Most of those questions answer themselves. I'm not talkin about the "decorative wrap" I mean are they like rocket tubes?
flying fish Posted October 7, 2007 Posted October 7, 2007 Most people buy mortars from pyro suppliers. HDPE and Fiberglass are more common than cardboard these days. One such supplier that comes to mind is Kastnerhdpemortars.com
asilentbob Posted October 7, 2007 Posted October 7, 2007 So... finally got a pic of my 4" shell... I'm calling him Jerry... As in Tom and Jerry... http://i20.tinypic.com/9uap9w.jpg Its a sparse breaks of old crappily frail pumped 3/4" win20 stars with 2 1-3/4" rising shells with around 1/4" pumped win20 stars (also crappy) and there is a 3/4" win20 rising comet (also crappy.) ... But there is no way that you can say that the shell looks crappy. Am I right? Hopefully ill have enough time to make another one or 2 before this shoot this weekend... Using my freshly made modified win20 pumped stars and/or crossetts... I just gotta find some around 3/4" OD paper disks... or make a punch or something to make a bunch (sharpened 3/4" Cu pipe perhaps?)... then test some crossetts to get them breakin! http://www.cannonfuse.com/store/pc/viewCat...sp?idCategory=5
WarezWally Posted October 7, 2007 Posted October 7, 2007 I'm digging the foam lift cup Have fun scraping that out
Mumbles Posted October 7, 2007 Posted October 7, 2007 Just a word of caution. When firing at a group shoot, people tend to get angry at people using plastic cups to hold the lift. They sit in the mortar, and don't compress very well which causes a buildup and eventually problems with lifting. If you're firing them on your own, then its probably no problem.
asilentbob Posted October 7, 2007 Posted October 7, 2007 Thanks for that mumbles. I suppose i could rip/cut it off and find a paper cup to attach...
Tweetybird88 Posted October 8, 2007 Posted October 8, 2007 Would 93% magnesium work for pyrotechnic applications. The rest is mostly aluminum.
mormanman Posted October 8, 2007 Posted October 8, 2007 Would 93% magnesium work for pyrotechnic applications. The rest is mostly aluminum. I would think it would. All the difference would be is that its like very high Mg content in MgAl.
RUUUUUN Posted October 13, 2007 Posted October 13, 2007 I fractured my fifth metatarsal (the bone going from your ankle to your pinky toe in your foot) and I can't really do anything physical. :( The doc said I should just lay around and try get sympathy from people... thats boring. Looks like some chem is headed my way. :) On a more positive note I am physically qualified to get into the Marine Force Recon, if I am on crutches for 6-8 weeks I will be able to do alot more pushups and possibly pull ups, but my running is going to seriously suffer, blast. Does anybody know a way to excercise your calf muscle without standing on it?? Atrophy be D*mned!!!!
flying fish Posted October 13, 2007 Posted October 13, 2007 Though I'm happy I finally made some good quality Black Powder, now I'm wondering...where the hell do I store this stuff? I threw away all of my old GOEX cans, so that's out of the question. I believe they are made of Aluminum, but I'm not sure. I guess you aren't supposed to store it in dielectric containers like plastic, right? Any suggestions?
crazyboy25 Posted October 13, 2007 Posted October 13, 2007 just store it in ziplock bags if you are concerned about static spray the outside with some static guard firsthttp://www.packinglight.net/plight/assets/assets/images/autogen/a_LCSTATICGUARD.jpg BTW pudidotdk did you get my PM?
Mumbles Posted October 14, 2007 Posted October 14, 2007 I generally just store it in plastic. If you're worried about sparks and such, you may want to starting eating oatmeal for 3 meals a day. The cardboard containes they come in are ideal. I hear of other people who mix flash in them to an extent.
flying fish Posted October 14, 2007 Posted October 14, 2007 Thanks guys! I guess if most people use plastic without issues, it's probably ok. I've also got a can of static guard around here somewhere! I usually don't do so much pyrotechnics in the winter (when the humidity is low) anyway.
LGM Posted October 15, 2007 Posted October 15, 2007 I guess I'll put this here. Is it for the most part legal to make a firework as long as it fits into what is legal to possess and use in your area? The laws in my area (WI) are kind of vague, I think most of it is left to the discresion of the police. People can set off pretty much anything during the fourth without getting arrested, I've actually noticed less police on patrol that day in the past.
TheSidewinder Posted October 15, 2007 Posted October 15, 2007 LGM, I *think* I understand what you're asking, but if I've misunderstood you this answer won't apply. If you home-make ANYTHING, it's automatically Class B, so-called "professional" fireworks. This is Federal law. And while Federal law allows you to make things like that, it's the additional Federal STORAGE regulations that are the "gotcha". Storage is regulated and enforced by the BATF. What you buy "over the counter" in Wisconsin (or other states) is Class C, or "consumer" fireworks. It doesn't matter if you make an exact copy of some Class C device, it's still considered Class B. Even simple sparklers. (NOTE: Strictly for reference, High Explosives are Class A. HE's have no place in pyro, and discussion of such is forbidden in this forum so that's all I'll say about it.) All that said, I too have noticed that the police enforce fireworks regulations unevenly. In my neighborhood, almost everyone is shooting (Class C) on the fourth, although it's illegal statewide. The police here become deaf and blind around that time, investigating ONLY if their is a complaint by a neighbor (which there never is). On the other hand, shoot anything at any other time of the year, and they show up quickly. Hope that answered your question(s). M
crazyboy25 Posted October 15, 2007 Posted October 15, 2007 interesting..i pretty much knew all of that but you specifically mentioned storage get you so theoretically they re legal to make and set off provided they don't send a second in storage?
flying fish Posted October 15, 2007 Posted October 15, 2007 If I recall correctly, technically you are supposed to set off (or otherwise dispose of) anything you make within 24 hours from the time you built it. I remember reading in the ATF orange book that it is illegal to "manufacture explosives" without the lisence, with fireworks falling into the category of "explosives". HOWEVER, I think there must be a way around that because according to skylighter (and many other hobbyists), the ATF themselves have said that it is legal for hobbyists so long as they don't store the devices (and comply with state & local laws...). This contradiction is what confused me most. And then of course there are some other things that you definetely need a type 20 lisence to do legally, like making flash and certain other compositions.
ULTRABUF Posted October 15, 2007 Posted October 15, 2007 I thought I read somwhere that there is some law that you can make basically any explosive substance as long as it is in very small amounts for experimental purposes or something. I'm probably remembering incorrectly though.
frogy Posted October 16, 2007 Posted October 16, 2007 It's illegal to make black powder without an ATFE 24... number may be wrong though... I also believe ramming black powder (as in the sense of a rocket motor) is illegal... So I'd suppose pressing is also, unless it's mainly a safety precaution... In the U.S. there are very little things you can get away with dealing with fireworks unless it's on the 4th of July and sometimes on New Years... I was launching 2.5"/3" shells out in a corn field... With no one around for about 3 miles except me and some friends and the police came... Good thing we walked there and didn't have and light simply exited quickly ... I don't see how we're disturbing anyone because most everyone around is younger in that area and it wasn't a school night... I suppose 25 gram flash salutes could bring attention from a few miles away
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