Mumbles Posted September 14, 2007 Share Posted September 14, 2007 Ok, you have to remember that Freeman is possibly not familiar with specific formulas. If you here an anouncer and said, this shell have M-27. Would you know that It would mean mumble #27 glitter? He's old, and might not have read all the books. You really should give a full discription. Chrysanthemum shell to red glitter is really all that is needed. By they way. You guys should watch out in Iowa in 2 years. I am going for Best first time class B competitor, and no one shall get in my way, Link to comment Share on other sites More sharing options...
frogy Posted September 14, 2007 Share Posted September 14, 2007 Hmm I might drive to Iowa in 2 years then... I won't be old enough to enter PGI though, at least I think not... I'll still bring some stuff Link to comment Share on other sites More sharing options...
qwezxc12 Posted September 14, 2007 Author Share Posted September 14, 2007 I never said that they can't be rammed or whatnot. I ram all my comets up to 1", mostly because I don't make any bigger ones yet. But the way Mormanman was describing it, would result in very weak comets and would definatly disintegrate upon lift/break.Mumbles, I wasn't trying to be contradictory - it wasn't intended to read like that. I agree that flipping comp out of a mold will probably not work unless you're using a really stout binder, like epoxy or something. When I ram the 1.5in comets, it's in a brass comet pump, so they're consolidated pretty well. I also should point out that primarily use Resorcinol resin binder for my comets. It's far superior to Dextrin strength-wise. Link to comment Share on other sites More sharing options...
psyco_1322 Posted September 14, 2007 Share Posted September 14, 2007 Well all he has to do is announce it, not understand it. The understanding is for teh audiance and judges. If you seen him in his flash sub class rambling off random formulas at the speed of light youd expect him to atleast now what c-8 is. And it isnt a personal comp like yours. Link to comment Share on other sites More sharing options...
Zmuro Posted November 1, 2007 Share Posted November 1, 2007 I got a 2 pounds of Al turnings and the average size is 2x3mm. Could I use those for comets or it has to be smaller. I succsesfully shot a C6 comet and I was thinking about to add some turnings in this type of comet, or would it work better with greenmix and Al turnings. http://shrani.si/f/h/UR/4pApWjPA/3incometc6.aviThe picture of Al turnings:http://shrani.si/t/3W/HJ/3guPhVNg/alturningscustom.jpg Link to comment Share on other sites More sharing options...
leosedf Posted November 8, 2007 Share Posted November 8, 2007 2 inch comets, Chrys #8 with Ti. Rammed. http://www.youtube.com/watch?v=LcLdeRdMAeUhttp://www.youtube.com/watch?v=LWFzR_6fZOk Link to comment Share on other sites More sharing options...
pudidotdk Posted November 8, 2007 Share Posted November 8, 2007 Really nice, leosedf. Any specific type of titanium?I've got sponge in 20-50 mesh range. Link to comment Share on other sites More sharing options...
Mumbles Posted November 8, 2007 Share Posted November 8, 2007 Also, if you don't mind me asking, how much Ti did you mix in with the C8? Link to comment Share on other sites More sharing options...
pudidotdk Posted November 8, 2007 Share Posted November 8, 2007 According to the YouTube description, 7% Link to comment Share on other sites More sharing options...
leosedf Posted November 8, 2007 Share Posted November 8, 2007 Correct.The Ti is probably the same as yours pudi 20-50 mesh sponge. Link to comment Share on other sites More sharing options...
RubenE Posted November 8, 2007 Share Posted November 8, 2007 Nice comets you got there, leosedf. I've launched som 2inchers my self: The green mix andMgAl comp (really bright in real life!). Crysantemum 6 and D1 Glitter. Link to comment Share on other sites More sharing options...
qwezxc12 Posted November 8, 2007 Author Share Posted November 8, 2007 2 inch comets, Chrys #8 with Ti. Rammed. Wow, awesome! Nice job on those. Just dextrin for binder? Link to comment Share on other sites More sharing options...
leosedf Posted November 8, 2007 Share Posted November 8, 2007 Gee... forgot that. Yes Dextrin as a binder. 5%I will take pics of the homemade tools used.Maybe pics of the comets too. Link to comment Share on other sites More sharing options...
hondo Posted November 16, 2007 Share Posted November 16, 2007 what is the ratio of lift to comet weight, is it the standard 10 percent ie 100 gram comet and 10 grams lift? Link to comment Share on other sites More sharing options...
Mumbles Posted November 16, 2007 Share Posted November 16, 2007 Do to differing burn rates, there is no standard or accepted ratio. It has to be tweaked to each individual one. 1/10 is not a bad place to start though. Link to comment Share on other sites More sharing options...
pudidotdk Posted November 17, 2007 Share Posted November 17, 2007 Hmm... going to plan on making 2" comet pump, but how much composition does one comet need, and what would the best diameter for the cometpump be? Link to comment Share on other sites More sharing options...
RubenE Posted November 17, 2007 Share Posted November 17, 2007 I use around 50g of composition in 2" comets, and the I.D of my pump is 4,5cm. That allows me to wrap it with duct tape, and there is also room enough for a thin quick match. Probably not the best diameter though, but it works fine. Link to comment Share on other sites More sharing options...
Mumbles Posted November 17, 2007 Share Posted November 17, 2007 4.5 cm is actually a pretty good size. It's what I'm looking into. Anyway, I'd suggest using paper over duct tape. It will actually burn away cleanly instead of bringing whatever nasties burning duct tape produces back to earth. Might not be the best math here, but my 7/8" comets take around 10-15g each. Assuming 1.75" comets are twice as large in every dimension, you get a volume increase by a factor of 8 (2^3). That means they should weigh in around 80-120g. It really depends on the composition. Less mass for something like tiger tail, more mass for something with Ti or metal fuels. Link to comment Share on other sites More sharing options...
blaadjes Posted November 17, 2007 Share Posted November 17, 2007 I use around 50g of composition in 2" comets, and the I.D of my pump is 4,5cm. That allows me to wrap it with duct tape, and there is also room enough for a thin quick match. Probably not the best diameter though, but it works fine. Hi there, I love your D1 & C8 comets.I read that you use 50gr comp. per comet. What is the dimention of your commets? Diameter = 4,5 cmHeigt = ?? cm Do you ramm or press them? I want to make a few for new year. Greetz. Link to comment Share on other sites More sharing options...
RubenE Posted November 18, 2007 Share Posted November 18, 2007 I don't have any D1 comets or C6 comets lying around so I am not able to meassure one, anyways, the height of the comet depends on the composition. I press them in a homemade hydraulic press. Link to comment Share on other sites More sharing options...
pudidotdk Posted November 18, 2007 Share Posted November 18, 2007 Instead of making a powder die, couldn't one just use a comet pump to create the pucks - Or the other way around?I really don't like making multiple tools if I can save half the effort and make one! Link to comment Share on other sites More sharing options...
qwezxc12 Posted November 18, 2007 Author Share Posted November 18, 2007 Instead of making a powder die, couldn't one just use a comet pump to create the pucks - Or the other way around?I really don't like making multiple tools if I can save half the effort and make one! The 3in comet pump I made is my powder die; no reason why you couldn't do the same...it might be a bit tedious if you're using a small (1in - 2in) comet pump as a powder die, though. Link to comment Share on other sites More sharing options...
mormanman Posted November 18, 2007 Share Posted November 18, 2007 I don't know if anyone does this, but I ram my comets. I wet them with the dextrin and everything and put it in a 1" ID tube and ram it. They turn out pretty good, they don't break in the air either. Its pretty cool. Link to comment Share on other sites More sharing options...
Bonny Posted November 19, 2007 Share Posted November 19, 2007 I don't know if anyone does this, but I ram my comets. I wet them with the dextrin and everything and put it in a 1" ID tube and ram it. They turn out pretty good, they don't break in the air either. Its pretty cool. I do exactly the same for 1" comets. I have a pc. of 1" ID stainless pipe and a wood rammer. I've had a few crumble a bit, but for the most part they're good. I just need to work on getting the length of the comet more consistent than a fat felt marker line. I guess I could cut them to length... Link to comment Share on other sites More sharing options...
mormanman Posted November 19, 2007 Share Posted November 19, 2007 They work good. Never had a problem except the tube wasn't as stable as I wanted it and it fell over. It was pretty funny. Link to comment Share on other sites More sharing options...
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