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hyfalcon
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When you try substituting nitrates, check them for being hygroscopic. I know sodium nitrate is so dry it well before use and then don't store your
firework long at all. Use it.
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violet sin
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certain fire works are aloud in my area, but none that fly, boom or shoot (roman candle). doesn't leave one much room but colors and spark showers.
fine by me. but as far as I know there is no law against model rockets. any damages incurred by starting a fire in the miles and miles of dry grass,
however will be punishable.
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Zyklon-A
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Get a permit of course. That is, if you want to do it legally.
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Bert
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This does belong in "beginnings" for now... Anything without a balanced reaction and referances or good lab notes does.
You need to know that Barium and Strontium nitrates have 2 possible decomposition reactions.
If you are not using a metallic high temperature fuel, you will not be able to use all the Oxygen.
Read on Oxidizers in Takeio Shimizu's Fireworks: The Art, Science and Technique. In the section on materials, you will find the possible decomposition reactions.
Rapopart’s Rules for critical commentary:
1. Attempt to re-express your target’s position so clearly, vividly and fairly that your target says: “Thanks, I wish I’d thought of putting it
that way.”
2. List any points of agreement (especially if they are not matters of general or widespread agreement).
3. Mention anything you have learned from your target.
4. Only then are you permitted to say so much as a word of rebuttal or criticism.
Anatol Rapoport was a Russian-born American mathematical psychologist (1911-2007).
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Bert
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Threads Merged
13-4-2014 at 12:36 |
Bert
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Threads Merged
13-4-2014 at 12:38 |
copperastic
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I know but would the police be mad if i did it in the countryside? I am not 18 so I can't get a license.
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hyfalcon
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Private property with some acreage say 5-10 with permission of the property owner. This being said I don't know what part of the country you live in
so your local ordinances may and will vary by state or county as the case may be.
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Bert
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1st off, unless we know what state you're in, we can't tell you what the laws are.
2nd, there is certainly an amateur rocketry group in your state. They will know non fireworks rocketry laws. Go here and look for a local group:
http://www.nar.org/NARseclist.php
3rd, the county or city/town you are in issues fireworks permits. Call your county clerk or city clerk, the same people issue the permits as take fees
for any other permitted activity.
You will CERTAINLY need a permit inside an incorporated area (city, town). A few states do not require a permit, many do not require a state fireworks
operator's license to use consumer fireworks.
Go here and see what local groups are in your area, contact them for information too.
http://www.fireworksalliance.org/cgi-bin/viewpage.pl?p=orgs
Rapopart’s Rules for critical commentary:
1. Attempt to re-express your target’s position so clearly, vividly and fairly that your target says: “Thanks, I wish I’d thought of putting it
that way.”
2. List any points of agreement (especially if they are not matters of general or widespread agreement).
3. Mention anything you have learned from your target.
4. Only then are you permitted to say so much as a word of rebuttal or criticism.
Anatol Rapoport was a Russian-born American mathematical psychologist (1911-2007).
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Zyklon-A
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Quote: Originally posted by weeksie98  | Incorrect molar ratios will also lead to formation of undesired sulfides, may be something simple to double check when using 2+ cations like Ba or
Sr. According to another forum, Ba(NO3)2 compositions are slightly sensitive to shock.
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Yep, barium nitrate tends to be more sensitive to shock than potassium nitrate. Although simple stoichiometry can make the black powder nearly the
same, it will be slightly off. The reason, I think is because the decomposition of KNO3 and Ba(NO3)2 require
different amounts of energy, and the formation of BaSO4 and K2SO4 will give out different amounts of energy, and
K2CO3 and BaO + CO2 respectively.
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Bert
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When making a statement on a property of a chemical or mixture, it would be nice to include a source atribution, a link to your source or some other
expalanation of the information's source such as how you experimented and determined these properties?
| Quote: Originally posted by Zyklonb | | Quote: Originally posted by weeksie98 | Incorrect molar ratios will also lead to formation of undesired sulfides, may be something simple to double check when using 2+ cations like Ba or
Sr. According to another forum, Ba(NO3)2 compositions are slightly sensitive to shock.
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Yep, barium nitrate tends to be more sensitive to shock than potassium nitrate. |
Rapopart’s Rules for critical commentary:
1. Attempt to re-express your target’s position so clearly, vividly and fairly that your target says: “Thanks, I wish I’d thought of putting it
that way.”
2. List any points of agreement (especially if they are not matters of general or widespread agreement).
3. Mention anything you have learned from your target.
4. Only then are you permitted to say so much as a word of rebuttal or criticism.
Anatol Rapoport was a Russian-born American mathematical psychologist (1911-2007).
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Zyklon-A
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That statement was guided only by my own personal experience. Barium nitrate flash powder is the only flash powder which I have successfully detonated
via hammer test or other shock. (with the exception of chlorates and/or sulfur containing mixtures).
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copperastic
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Does anyone here live in Wisconsin and knows how to get a license?
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Bert
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1: See Shimizu's FAST p.319, 320 for drop hammer & friction tests of flash mixtures. I linked to this earlier.
2: Wisconsin has no state fireworks operator's license.
You pull the permit from town or city, in unincorporated areas, from township. You'll need to be 18 to pull a permit, parents will need to do that for
you. Proof of insurance isn't required by state law, cities or towns may have their own requirement.
Rapopart’s Rules for critical commentary:
1. Attempt to re-express your target’s position so clearly, vividly and fairly that your target says: “Thanks, I wish I’d thought of putting it
that way.”
2. List any points of agreement (especially if they are not matters of general or widespread agreement).
3. Mention anything you have learned from your target.
4. Only then are you permitted to say so much as a word of rebuttal or criticism.
Anatol Rapoport was a Russian-born American mathematical psychologist (1911-2007).
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blogfast25
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I've got loads and loads of used printer rolls, OD 30 mm, H 55 mm, wall thickness about 2.5 mm. Genuine Kraft paper and seriously strong. Would these
be of any value to a fireworks amateur?
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Bert
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The tubes are certainly useable for that purpose- Are they convolute or spiral wound? If convolute, these would be suitable for several other
pyrotechnic uses as well.
Rapopart’s Rules for critical commentary:
1. Attempt to re-express your target’s position so clearly, vividly and fairly that your target says: “Thanks, I wish I’d thought of putting it
that way.”
2. List any points of agreement (especially if they are not matters of general or widespread agreement).
3. Mention anything you have learned from your target.
4. Only then are you permitted to say so much as a word of rebuttal or criticism.
Anatol Rapoport was a Russian-born American mathematical psychologist (1911-2007).
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blogfast25
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| Quote: Originally posted by Bert | | The tubes are certainly useable for that purpose- Are they convolute or spiral wound? If convolute, these would be suitable for several other
pyrotechnic uses as well. |
Spiral, by the looks of it.
You think those dimensions could be attractive to pyrofolk?
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Bert
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Don't know how long they are, but amateur pyros are known to dive into trash dumpsters for a likely looking cardboard tube. I certainly did when I was
new to the field!
Spiral tubes are usually reserved for reports, salute cases, firecrackers etc.
The spiral lap on the inside often allows fire to travel down the side of a pressed or rammed fuel grain and leads to a CATO , so these are not
usually considered suitable for rockets, wheel drivers or similar uses.
Convolute tubes are chosen for rocket motors and similar applications.
Rapopart’s Rules for critical commentary:
1. Attempt to re-express your target’s position so clearly, vividly and fairly that your target says: “Thanks, I wish I’d thought of putting it
that way.”
2. List any points of agreement (especially if they are not matters of general or widespread agreement).
3. Mention anything you have learned from your target.
4. Only then are you permitted to say so much as a word of rebuttal or criticism.
Anatol Rapoport was a Russian-born American mathematical psychologist (1911-2007).
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copperastic
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Is there a way to make an aerial salute shell thing (A hollow sphere at the top with black powder and stars And an engine at the bottom) Without it
exploding because thats illegal in my city. Also has anyone made any fireworks that stay on the ground because thats all i could do in my city.
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blogfast25
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Bert:
They are 55 mm long, 33 mm OD.
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Bert
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| Quote: Originally posted by copperastic | | Is there a way to make an aerial salute shell thing (A hollow sphere at the top with black powder and stars And an engine at the bottom) Without it
exploding because thats illegal in my city. Also has anyone made any fireworks that stay on the ground because thats all i could do in my city.
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You're in Wisconsin, correct?
Look up these people, if your parents are OK with you learning pyrotechnic construction. They do hands on training at some of their meetings, and pull
permits so members can use fireworks- ALL kinds of fireworks.
http://www.wpag.us
Additionally, the PGII convention is in Iowa this August. You will need to have your folks sign you up for that, if you'd like to attend. Lots of
hands on classes there, and lots of open shooting for members.
http://www.pgi.org/convention/overview.php
In the meantime, the Shimizu FAST book I linked to explains aerial shell construction pretty well.
Rapopart’s Rules for critical commentary:
1. Attempt to re-express your target’s position so clearly, vividly and fairly that your target says: “Thanks, I wish I’d thought of putting it
that way.”
2. List any points of agreement (especially if they are not matters of general or widespread agreement).
3. Mention anything you have learned from your target.
4. Only then are you permitted to say so much as a word of rebuttal or criticism.
Anatol Rapoport was a Russian-born American mathematical psychologist (1911-2007).
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crazyboy
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I rolled my own tubes out of printer paper, glue sticks or thinned Elmers glue works fine. (For rockets ~1.5cm ID)
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copperastic
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Thanks bert.
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copperastic
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Bert do you know how to join?
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Bert
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The first step would be looking at the linked sites. Membership information is there-
Rapopart’s Rules for critical commentary:
1. Attempt to re-express your target’s position so clearly, vividly and fairly that your target says: “Thanks, I wish I’d thought of putting it
that way.”
2. List any points of agreement (especially if they are not matters of general or widespread agreement).
3. Mention anything you have learned from your target.
4. Only then are you permitted to say so much as a word of rebuttal or criticism.
Anatol Rapoport was a Russian-born American mathematical psychologist (1911-2007).
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copperastic
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class B fireworks
Hi, I was reading this page http://www.wpag.us/shooters_cert.htm
and it says that you ca use class b fireworks. What are class b fireworks? I looked it up but found nothing.
Thanks
P.S. I posted this twice because i did it once in beginnings but it occurred to me that it should be in energetic materials.
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Bert
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Threads Merged
18-4-2014 at 06:50 |
Bert
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Remember, free information on the internet is often worth EXACTLY what you paid for it!
--------------------------
Class "B" Special Fireworks is an obsolete US DOT classification, used for shipping papers and put on boxes or other outer packages of fireworks, the
purpose being to let anyone who saw the item know what kind of a hazard it represented (like firemen or police approaching a crashed truck with the
boxes spilled all over the road...) Fireworks people had the habit of calling all the larger fireworks that required a federal license "B". Older
fireworks people still use the term, but it's not acceptable on shipping papers or packages anymore.
Hazardous material labeling is now standardized by the UN world wide, rather than each country having their own system.
The items formerly known as "B" are now called 1.3G Fireworks, or just "1.3" for short. Some of the larger shells and cases of bulk salutes are called
1.1G, and consumer fireworks anyone can buy without a federal license are 1.4G. (The obsolete US DOT term for consumer fireworks was Class "C").
When I fill out bill of lading, I refer to the professional grade display fireworks as:
UN0335 Fireworks 1.3G Packaging Group II
-or-
UN0333 Fireworks 1.1G Packaging Group II
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