FrankRizzo Posted March 24, 2006 Posted March 24, 2006 Who says you have to use expensive tape? Paste with 3 horizontal wraps of light craft. It gives me a powerful, symetrical break every time.Right on, bud. :-)
al93535 Posted March 27, 2006 Posted March 27, 2006 Ok, Here are the construction pics of the 4" can shell. I just need to prime, fuse, and wrap up. I'll post the pics of it completely finished soon. http://img.photobucket.com/albums/v242/al93535/inserts2.jpg http://img.photobucket.com/albums/v242/al93535/can1.jpg http://img.photobucket.com/albums/v242/al93535/can2.jpg http://img.photobucket.com/albums/v242/al93535/can3.jpg http://img.photobucket.com/albums/v242/al93535/can4.jpg http://img.photobucket.com/albums/v242/al93535/can5.jpg http://img.photobucket.com/albums/v242/al93535/can6.jpg http://img.photobucket.com/albums/v242/al93535/can7.jpg http://img.photobucket.com/albums/v242/al93535/canspike.jpg
aa92td Posted March 27, 2006 Posted March 27, 2006 WOW!!!!!Its Look Amaizing!!i Want To see this shell flyO_O
TheSidewinder Posted March 27, 2006 Posted March 27, 2006 VERY NICE job on the construction, Al!!! I, too, can't wait to see this go boom. M
Givat Posted March 27, 2006 Posted March 27, 2006 I remember in the last shells you gave the burst weight, lift weight ect'...Did you weight the paper case in this shell? (Just to know if only my cases are so havy )
justanotherpyro Posted March 27, 2006 Posted March 27, 2006 Very nice Al. I made one similar, but I don't have a mortar to fire it. It was supposed to be a 3" but after pasting its to fat for my 3" mortar.
al93535 Posted March 29, 2006 Posted March 29, 2006 The shell weighed in at 824 grams, and is lifted by 55 grams 3fa. Sorry I did not weigh the empty case, or the burst. http://img.photobucket.com/albums/v242/al9...canfinished.jpg Can't wait to light it! I am now making strobe shells, and then two 6" saturn shells. expect pictures of them soon!
Pretty green flame Posted March 29, 2006 Posted March 29, 2006 The shell weighed in at 824 grams, and is lifted by 55 grams 3fa. Sorry I did not weigh the empty case, or the burst. http://img.photobucket.com/albums/v242/al9...canfinished.jpg Can't wait to light it! I am now making strobe shells, and then two 6" saturn shells. expect pictures of them soon! Mind sharing the strobe formula you'll be using for your strobe shell.
al93535 Posted March 29, 2006 Posted March 29, 2006 Sure, Here they are: White: (regular blesser strobe)Barium Nitrate 51Sulfur 19Magnalium 100 mesh 18Potassium Nitrate 7Dextrin 5 Green 46 Ammonium Perchlorate18 Magnesium (100-325 mesh)18 Barium Sulfate10 Barium Carbonate8 Saran resin2 Potassium Dichromate Orange 60 Ammonium Perchlorate24 Magnesium (100-325 mesh)13 Calcium Sulfate8 Calcium Carbonate5 Potassium Dichromate5 Saran resin Red 50 Ammonium Perchlorate18 Magnesium (100-325 mesh)16 Strontium Sulfate10 Strontium Carbonate8 Saran resin2 Potassium Dichromate So far I have only tried the white and orange, they both work very well. I just need to coat my Mg in dichromate. Of course the AP / Mg strobes are only storable for 4-6 months. So I am trying to get the altered white blesser to work as a green by adding chlorine donors. I tried by adding 12% Saran resin, and it did not perform that great. I will work on it and report back when I have a good formula. I will also try to get some video's of the strobes in action.
Mumbles Posted March 29, 2006 Posted March 29, 2006 Yes, it'd not uncommon to see Mg based strobes. I honestly don't know if I have ever made a magnalium based strobe.
AVR Posted March 30, 2006 Posted March 30, 2006 First of all, I am not a pro-pyro like many of you guys. I am more into rockets, but today I made my first aerial shell! I made four insert-shells that holds about 2,5 grams of 60/40 KClO4/MgAl flash as report(s).I used about 4 grams of home-made 'winecoal-black powder' for break and about 50-60 assorted stars I made this summer but forgot to mark...Here's a pic!
AVR Posted March 30, 2006 Posted March 30, 2006 Here is another pic on the shell. I am gonna spike it, then its finished! Launch date is set tomorrow!
Douchermann Posted March 30, 2006 Posted March 30, 2006 Very nice Get some pictures of it as its going off if you can. (Just video tape it and use a program like windows movie maker to take a snapshot of a section of the film.)
BigBang Posted March 30, 2006 Posted March 30, 2006 Did you roll that case yourself, and out of graph paper? Well, If it is rigid enough, it might survive. I would suggest vertical and horizontal spiking, lest you get a bad break.
Draco_Aster Posted March 30, 2006 Posted March 30, 2006 It looks as though the endcap has just been glued on there How many times did you layer it? But then again I guess its not a major deal if you dont get a symetric break with salutes.
Rooster Posted March 31, 2006 Posted March 31, 2006 It looks a bit sloppy, make sure the gas seal is supertight. Pasting does this. You should paste at least one layer of some paper on the outside. Or else the chances of you getting a starmine instead are large
AVR Posted March 31, 2006 Posted March 31, 2006 Hehe... everybody seems overwhelmed by my shell. Yeah, that's how a pro like me make 'em But I am not worried about leaks since I used vast amounts of 2 comp. wood glue to seal it up and glue the endplugs. I use 3 discs on each side(glued together). But the casing is a bit to thin, I know that. And I realised now that I don't have any room left(in the mortar) for spiking.... I just rolled a thin piece of paper with large amounts of glue as the final layer. I hope it will work OK. I'm gonna fire it tonight and film it. I live in Sweden, so 'tonight' is about 8-12h from now! BTW. Since the casing is not the strongest ever made by mankind, how much lift (75:15:10 -corned) would be ideally?
Pretty green flame Posted March 31, 2006 Posted March 31, 2006 BTW. Since the casing is not the strongest ever made by mankind, how much lift (75:15:10 -corned) would be ideally? Unless you give us the weight of your shell we won't be able to help you. But the general rule of thumb that i use on my shells is 1/10th of the shells total weight, i might use less if the shell fits in the mortar tightly.
AVR Posted March 31, 2006 Posted March 31, 2006 Thanks pretty green flame! The shell weights 70 grams. I'll be using 8-10g then... (and som small Mg stars, just because I've got lots of them).
AVR Posted March 31, 2006 Posted March 31, 2006 I made another shell. I filled it with 15 grams: 60:10:15:15 (KClO4, KNO3, Ti, MgAl). I hope for an intense flash that last longer than traditional 70:30. Hopefully it will be dry enough to shoot later today!
Rooster Posted March 31, 2006 Posted March 31, 2006 If you are concerned about the shell not handeling the break, you can cut a styrofoam circle the size of your shell, and put it between the lift and the shell. It will take much of the stress off the shell. You can even make a small hol it it to be 100% sure your fuse lights.
Pretty green flame Posted March 31, 2006 Posted March 31, 2006 About the fuse, what kind it it, it looks like a spollette but the powder looks like it wasn't rammed hard enough.
AVR Posted March 31, 2006 Posted March 31, 2006 Rooster: Smart idea! But I think it will handle the lift now as the shell is dry!Pretty green flame: Yes, it's a spollette. But the powder is not rammed that hard, instead I made a slurry with ~3% dextrin and gently pressed it. Now it's rock hard. Hopefully it will work fairly well...
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