Brakkie Posted April 25, 2008 Posted April 25, 2008 I figured I'll post a vid from a while ago here as well. This competition needs some more vids Some specs: Cardboard MortarID: 3cm (1,2")Wall Thickness: 3mmLift: 4 grams H3 PulveroneComposition: Lancaster Chlorate Silver Pumped56.00% Potassium (Per)Chlorate38.00% Aluminium6.00% DextrinPrime: Miech's Superprime (I had to give it a name)75%..........PotassiumChlorate25%..........Charcoal10%..........Magnalium (75 to 100 mesh I'd say, comes from Czort) I've been very pleased by the stars accept for the fact that they seem to jet quit badly. I still got a bunch of these laying here that I'll shoot in a 3" mine. I'll use a tad more lift there and on my next batch I'll roll them on some cores to prevent this from happening.
Niter Posted July 14, 2008 Posted July 14, 2008 Looks good, quite some oomph for a 3cm starmine. Simple compositions, good results. (bit scary though, that chlorate) Are you sure these stars even need priming? I mean they are basically a chlorate flash with some dextrin, should light like a charm. Are you Dutch like me?
Miech Posted July 15, 2008 Posted July 15, 2008 They didn't light without prime, so I suggested to prime some lift composition with 10% magnalium added in the stars. The aluminium used was aluminium bronze from Czort, I would say something between 200 and 600 mesh stearin coated flakes. is the 3" starmine, it felt like an earthquake. The camera didn't pick up the low frequencies really well, but listen to the echo and you can imagine how loud it was. And yes, we're dutch.
Brakkie Posted July 19, 2008 Author Posted July 19, 2008 I just whipped up a small batch a couple days ago and these DO seem to light like a charm! As sad as it sounds I ran out of my dextrin so I was only able to use 4% instead of the 6% "required". They're still plenty hard. I just laid a star on 0,2 grams of pulverone and lit the pulverone. The star catched fire immedietly. Also just a quick touch of a propane burner will do the job fine. Can't wait to shoot these as a shell and see how they perform in the sky.
iclazion Posted July 20, 2008 Posted July 20, 2008 Miech that was freakin amazing. Could you please give us the name or whole composition of the stars you used, and the amount of lift? Dit was baie goed gedoen.
FREAKYDUTCHMEN Posted July 20, 2008 Posted July 20, 2008 Dit was baie goed gedoen. What's that? South African language or so? Too bad the stars are jetting! I think you should use more fuel, gives more tail and I think it wouldn't jet that much.
Brakkie Posted July 20, 2008 Author Posted July 20, 2008 @iclazion: That 3" starmine was mine. It had 160 grams of stars and 30 grams of H3 as lift. The composition is in the first post of this topic. Composition: Lancaster Chlorate Silver Pumped56.00% Potassium (Per)Chlorate38.00% Aluminium6.00% Dextrin @Freakydutchman: No matter what ammount of lift you'll use these stars will continue to jet. I've blown up so many 1" mortars to try and solve this problem by using more lift. I'll follow Miech's (I think it was...) advice and roll these stars on a core next time. That should solve the problem.
PyroMan LTU Posted August 10, 2008 Posted August 10, 2008 hello,this is my first attempt to make colored star , results personaly were pretty good all 5 vere load into 1'' starmines, last two 1'' shells
FREAKYDUTCHMEN Posted August 11, 2008 Posted August 11, 2008 @iclazion: That 3" starmine was mine. It had 160 grams of stars and 30 grams of H3 as lift. The composition is in the first post of this topic. Composition: Lancaster Chlorate Silver Pumped56.00% Potassium (Per)Chlorate38.00% Aluminium6.00% Dextrin @Freakydutchman: No matter what ammount of lift you'll use these stars will continue to jet. I've blown up so many 1" mortars to try and solve this problem by using more lift. I'll follow Miech's (I think it was...) advice and roll these stars on a core next time. That should solve the problem. I wasn't talking about the lift. I know that wouldn't do the trick. Your star composition is just not the right one. Maybe you could try 50:50:5 or so.
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