Mumbles Posted January 31, 2006 Posted January 31, 2006 Fe streamer: Potassium nitrate - 45 pbw.Sulfur - 6 pbw. Coal - 29 pbw. Iron - 22 pbw. Dextrin - 5 pbw. http://www.ruspyro.net/festreamer/2.JPG Composition was mixed on the NC with acetone, in order to avoid of the oxidation of iron. I use is pine coal, I consider it most suitable for such purposes. Well in the completion I want to present 3 phots and video, and I want to say that effect considerably richer, than Tiger tail. It is better to use cast iron shavings, they give the richer effect. Photos: http://www.ruspyro.net/festreamer/1.JPGhttp://www.ruspyro.net/festreamer/2.JPGhttp://www.ruspyro.net/festreamer/3.JPG And video: http://www.ruspyro.net/festreamer/FeStreamer.rar I was used star by diameter 1". -------------------------------- Posted by: Mumbles Posted on: January 11th, 2006, 2:55pmIf using NC binding, what is the purpose of having Dextrin in the formula? It's use as a fuel is inferior, to me at least. I do like how this formula looks though. Is the charcoal ground to a powder, or is it a specific mesh? Also, are there any special preparations with this mixture, such as ball milling the KNO3, S, and C before hand, or are they just screened together? -------------------------------- Posted by: justanotherpyro Posted on: January 11th, 2006, 11:12pmMore information would be great. I have 20 pounds of iron grindings and it would be great if I could make such a cool effect with them.
justanotherpyro Posted February 1, 2006 Posted February 1, 2006 Would it do well to bind this composition with an alcohol binder like shellac instead of the NC?
aa92td Posted February 4, 2006 Posted February 4, 2006 Its will work, but i think NC its better its cheaper,stronger.If you dont have a home made NC you can use "ping-pong balls\table tennis balls"
Mumbles Posted February 4, 2006 Author Posted February 4, 2006 I think just using the dextrin the forumla to bind would be just fine. Well, as long as the Fe is coated. I think the only advantage that NC would have over dextrin or shellac is drying time. The NC lacquer would definatly eat my press, so that is out for me anyway. Perhaps I will try some smaller pumped or cut stars and see how that goes.
justanotherpyro Posted February 27, 2006 Posted February 27, 2006 I think just using the dextrin the forumla to bind would be just fine. Well, as long as the Fe is coated. IWhat did you have in mind for a coating mumbles?
Mumbles Posted February 27, 2006 Author Posted February 27, 2006 Fe is usually coated with paraffin. I see no reason linseed oil wouldn't work either though.
justanotherpyro Posted February 27, 2006 Posted February 27, 2006 As easy as dumping some linseed oil in a container of iron and stiring it up?
Mumbles Posted February 27, 2006 Author Posted February 27, 2006 Yep, well one must let it cure too. When it cures it polyermised and effectivly coats the metal in a plastic like substance. Once it gets warmer I will do a pictorial on the subject. I'll probably use Mg though. Same process though.
Givat Posted February 27, 2006 Posted February 27, 2006 I can't see any reason for coating Fe, especially if it's coarse. It wont get any more oxide than it already has from exposure to air.
i.k88s.f.u Posted February 27, 2006 Posted February 27, 2006 Trust me it will become a chunk of rust... Last time i did Fe stars i tried to coat my 55 mesh spherical Fe with coconut oil and i actually worked,but the coconut oil is pretty expensive so i guess linseed oil is better.
justanotherpyro Posted March 1, 2006 Posted March 1, 2006 The only possible way you could use water is with very minimal wetting with a high alcohol content solution, and then pumping them. I agree with i.k88s.f.u though. Iron looks great in a fountain, but when you get it wet it just rusts it. Has anyone besides our friendly Russian pyros given this a try? I am going to. I will probably just screen the chems together several times w/o milling and see how it all goes. If I do try and have success I'll post it here. Where are the Russian pyros anyways? They had some great stuff, were very experienced and then all of a sudden disappeared
justanotherpyro Posted March 5, 2006 Posted March 5, 2006 I made these a few days ago, and tryed them tonight in a few 2" shells. The burn time on these is very long, and not because of the stars size. The actual material burns for a very long time and comes back down as a ball of smoldering material that bursts when it hits the ground ( or in my case roofs). Needless to say I am glad that I tested these after a rain storm. I may suggest adding a percentage of BP to increase burn time, and to not use these in smaller shells.
Mumbles Posted March 5, 2006 Author Posted March 5, 2006 How large were the stars you made? In the video it seemed to have a decent burn rate. Did you just bind with dextrin, or did you actually use NC?
justanotherpyro Posted March 5, 2006 Posted March 5, 2006 The stars I used were 1/4 inch wide and long and about 1/8 thick. I bound with NC, my carbon was airfloat, and the iron was around 30-40 mesh.
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