cplmac Posted January 28, 2007 Posted January 28, 2007 Okay I'll take it from the top. I usually film one at a time, not all at once, but my brother had a brainfart and did 'em all together. I would get Nero or some other video editing program, but the truth is I put up so many videos I don't really have time to do much in the way of editing. Thanks for noticing the silence, that was obviousely intentional. I asked my brothers to make sure to stay quiet, and honestly we are all kind of spoiled at this point because I fire off every other night. The whistle ball is a salute with a Ti Whistle spolette time fuse. The 5" zinc did indeed break low, I under-lifted it as is often the case with zinc shells. Shame to, those zinc stars are beautiful at 1.25" wide. I tried something different with that shell in that I pasted it in with gummed fiber tape, which won't be tried again. If I had to guess the break altitude I would say 150'. I built a shelf in each of the shell halves and cardboard inserts to hold four stars in each half in a cross pattern. Assembled the shells with the cross patterns offset. Broke with 25 grams of 50/50 meal/whistle.With the hot flash, I don't use any sulfur, and HE is not gonna fly well with Johnny Law. I get a ton of latitude as it is, but if I start buying HE there will be a problem. As far as the difference goes, there is a noticeable decibel gain. I would associate it with difference between a pair of really crappy speakers and a set of really high end speakers. The crappy speakers can get pretty darn loud but not quite as loud as the expensive speakers, but mostly the sound quality is vastly inferior. The hot flash mix very much rounds out the sound from standard standard flash, from low to high frequencies it balances out the sound and you can tweak your mix to emphasize a lower pitch boom or a higher pitch crack depending on your enclosure. The standard flash seems pretty heavy in the middle frequencies in my cylinders, but a little light on the boom and very light on the higher pitched crack. As far as finale chains of salutes I think it would be a waist because even a mediocre salute sounds good in volleys. But for salutes you throw up to punctuate or wake the crowd up during color it is my preference to use the hot. I also think it makes a big difference in rocket headers. Anyhow, as with all things pyro it is subjective.
ewest Posted January 28, 2007 Posted January 28, 2007 Shimizu stated that the following formula "produces the loudest report obtainable with a pottasium perchlorate/aluminum/sulfur composition.", from page 44, cited by Wouter Visser: In that section Shimizu was explaining Detonation Velocity, he gives 3 formulas and the one you quoted had the highest Detonation Velocity of the 3 examples, but I didn't see where Shimizu sited it as the "loudest report obtainable." Maybe with Perch and Al it is, but I think there's better mixes. Anyway, I got excited where you quoted Shimizu because I just got his book last week and I've been reading it.........I don't understand any of it, but I'm still trying
ewest Posted January 28, 2007 Posted January 28, 2007 Don't mean to double post, but I just watched the video. cplmac, were those GREEN hummers? If they were, I'd love to know the comp. you used.
cplmac Posted January 29, 2007 Posted January 29, 2007 They were indeed red to green, or vice versa, but they were not mine. I just took a couple of boxes of class C hummers and primed them. I should have mentioned that in the description, sorry.
qwezxc12 Posted January 29, 2007 Posted January 29, 2007 In that section Shimizu was explaining Detonation Velocity, he gives 3 formulas and the one you quoted had the highest Detonation Velocity of the 3 examples, but I didn't see where Shimizu sited it as the "loudest report obtainable." Maybe with Perch and Al it is, but I think there's better mixes. Anyway, I got excited where you quoted Shimizu because I just got his book last week and I've been reading it.........I don't understand any of it, but I'm still trying I was quoting a citation from Wouter's Practical fireworks Pages:http://www.wfvisser.dds.nl/compoDB.html#chapter6 He cites Dr. Shimizu and gives credit: page 44, "T. Shimizu, "Fireworks: The Art, Science and Technique", Pyrotechnica Publications, Austin, Texas, USA (1981)" I (unfortunately) do not have a copy of that work, so I was quoting second-hand...good for you for getting it, though.
cplmac Posted January 30, 2007 Posted January 30, 2007 Some new videos from tonight's testing. supposed to be a red glitter, life is full of disappointments. 1.25" gold glitter xette, shattered.... My buddies faster burning glitter xette. 1.25" whistle xette. Goodbye to another mortar. 2lb. Benze whistle to report, CATO 2lb. white whistle to report 3lb. BP with 80mesh charcoal to glitter to report. 2lb. white whistle to report using wolter's xette break flash.
Mumbles Posted January 30, 2007 Posted January 30, 2007 CPL, was that a red glitter formula you got, or some theory formula that someone came up with. It's something I've been working on for a little while now with no success better than a pink.
cplmac Posted January 30, 2007 Posted January 30, 2007 I just took the Purrington gold glitter formula which calls for 55 parts potassium nitrate and changed it to 30 parts potassium nitrate and 25 parts strontium nitrate. While it did not succeed in bringing out any red or pink for that matter, it did succeed in eating up the charcoal tail and burying the glitter. Gonna try something different tomorrow. I wanted a gold glitter with some trace red in the tail and a reddish head on the star. I might try pressing a bunch of red strobe pucks as a quick way to cheat.
optimus Posted January 30, 2007 Posted January 30, 2007 Good luck with the red glitter formula development! I have a feeling it's going to take something a little more exotic than Strontium Nitrate/Oxalate to get a true red glitter. I've tried a few things myself with no success. Anyone remember this? http://www.pyrobin.com/files/img_4549.jpg
FrankRizzo Posted January 30, 2007 Posted January 30, 2007 Ahh yes...the April fools joke that got *everyone*.
Mumbles Posted January 31, 2007 Posted January 31, 2007 That rainbow smoke thing on skylighter got quite a few as well.
cplmac Posted February 4, 2007 Posted February 4, 2007 Finally got a xette star to work right. Winokur 39 gold glitter. 3/4"
Newbergpyro Posted February 4, 2007 Posted February 4, 2007 Great Video, Very nice long glittery tail! good job!
cplmac Posted February 5, 2007 Posted February 5, 2007 Despite tonights devastating superbowl loss, I fired off a few celebratory items. And, like my Bears, they largely disappointed. Whistle to red strobe to green strobe to report. CATO 3" gold glitter crossette. Satisfactory....almost. 3" salute with the new mix. Again, satisfactory. I don't even know where to start. So many problems it's mind numbing. 4.2" gold glitter crossette. One thing I have down pat, making stuff go boom.
ewest Posted February 5, 2007 Posted February 5, 2007 How do you find the time to make so much stuff? It's simply amazing. Me on the other hand, I've been putting together a 6" shell now for 3 weekends and I don't even have the stuff laid out on the workbench yet LOL. I like the crosettes. One of these days I'll use mine. I bought a 1 1/4" tool from Wolter almost a year ago and have yet to even get it dirty.
qwezxc12 Posted February 5, 2007 Posted February 5, 2007 How do you find the time to make so much stuff?I'm envious, too...as I sit here finishing up week two on the road, my chems clumping, press gathering cobwebs and my scale pitifully unused. At least you're lighting stuff That glitter comp worked out really nice. Please keep us informed of your progress in tuning the break on those crossettes.
cplmac Posted February 5, 2007 Posted February 5, 2007 Will do. As for where I find the time, winter is the slow season for my work.
cplmac Posted February 11, 2007 Posted February 11, 2007 blue flash test, yeah, I wish... http://images.kodakgallery.com/photos2701/8/29/74/95/21/0/21957429811_0_ALB.jpg
Polumna Posted February 11, 2007 Posted February 11, 2007 hi dudes:( i just see text files!!! what´s wrong here??? polumna
Mumbles Posted February 11, 2007 Posted February 11, 2007 I have no idea what you're talking about Polumna. Please be a bit more specific.
FrankRizzo Posted February 11, 2007 Posted February 11, 2007 hi dudes:( i just see text files!!! what´s wrong here??? polumnaI'm going to assume that you mean you see gobbled junk when you open cplmac's attachments. What you need to do is associate mp4 files with a software viewer like Microsoft Media Player or VLC. Or, right-click on the link and click "Save Target As..." to save it to a folder, and then rename the file with .mpg instead of .mp4
Wyvern Posted February 12, 2007 Posted February 12, 2007 Hi, This will be my first post on these forums after browsing here for quite some time and i must say they are a great resource for starting pyros. Here is a Video of my first (working) 1lb bp rocket with FeTi tail with a 2.5" Ball header loaded with Al Stramer stars broken 2g with MgAl flash in a flashbag. *Edit* The flash was 275 mesh MgAl, KClO3 and Antimony Trisulfide in a 50:30:20 ratio (this is due to running out of blackhead alu) *Edit*The Ball shell was plastic but pasted with 3 layers of Kraft paper http://video.google.co.uk/videoplay?docid=...067926755962433 Please let me know what you think and how i could improve them. Wyvern
optimus Posted February 12, 2007 Posted February 12, 2007 Very nice rocket you've got there! Could you give some more details? What kind of MgAl? How much flash? Was this a plastic ball shell? Looks like you could improve the break a little, but apart from that it was great.
Polumna Posted February 12, 2007 Posted February 12, 2007 hi i can´t even see the videos, i have got the VLC player for Mac and the Windowsmediaplayerbut it still wont work advices would be very great, because i know that cplmac´s videos are very good and i wantto see them polumna
Wyvern Posted February 12, 2007 Posted February 12, 2007 What i would do is download Ace Mega codec packhttp://www.softpedia.com/progDownload/ACE-...nload-6778.html This will give you the codecs necessary to open pretty much any type of video Wyvern
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