dagabu Posted April 23, 2012 Posted April 23, 2012 A rondelle is more of a spiral of salutes going off in order than a ring of salutes. The one below has 5 inserts, which isn't enough IMO, but I was building with a friend. Sorry, antsy fingers, it is a baraq shell not a rondelle. -dag
JFeve81 Posted June 24, 2012 Posted June 24, 2012 (edited) Made this earlier today. It performed great so I'm going to be making some more of these for the 4th. I like the Texas pop rockets so finally got around to making some. Also like them because there is not a super loud bang when the salute/pop goes off. http://www.youtube.com/watch?v=FzScinn0HJk Edited June 24, 2012 by JFeve81
dagabu Posted June 24, 2012 Posted June 24, 2012 Made this earlier today. It performed great so I'm going to be making some more of these for the 4th. I like the Texas pop rockets so finally got around to making some. Also like them because there is not a super loud bang when the salute/pop goes off. http://www.youtube.com/watch?v=FzScinn0HJk Nice job coping them! I like the Texas pop rockets too, they have one of the nicest tails of all the 4 oz rockets. -dag
nater Posted June 24, 2012 Posted June 24, 2012 Here's a few more that I have posted elsewhere, but they might as well reside in the video thread too. 3/4" Core Burner BP with nozzle on H/U spindle. Header is a dump shell with cut blue stars. It wasn't quite dark enough for the stars to show up. The blue was pale, but it was obviously blue. For some reason blue stars are the hardest color to get right and they never show up well on camera to prove it. They're also cut a little small, I will go bigger next time. This was one of two identical rockets that were my first bigger ones with headers. All in all, I am pleased, and think I am finally on the right track. http://www.youtube.com/watch?v=aBxXLy7ikQk These are some different Super Bottle Rockets. I think first one was nozzleless and the second had a nozzle. Both used the same fuel that I used in my 3/4" rockets. The third SBR was my attempt at using Meal-D with a nozzle to lift a festival ball. The motor popped as soon as the fuse hit the grain. The last rocket is a 3/4" core burner BP, same as in the first video only the header is 3g binary flash in the end of the tube with an endcap glued on. http://www.youtube.com/watch?v=hkpuCUdcBl4 Last for today are a couple of girandolas made by two other people in the club. They were excellent, even with the one driver that popped. Definitely something to aspire to. Last in that video was a 3/4" Red-Ti gerb that I made. A gerb is close enough to a rocket, right? I was happy with the color and height, I just pressed a few too many increments for the tube wall. http://www.youtube.com/watch?v=DxNw16ypEVM
LehighValleyPyro Posted July 12, 2012 Posted July 12, 2012 1# benny whistle with 2" green header http://youtu.be/Nf70xgWnxLE
coldfire Posted July 22, 2012 Posted July 22, 2012 I shot one the other day too! Gave up with nozzles after getting a good, fast burning propellant.It's all in the milling. Will attach a 3" ball shell on another one tonight.
Seymour Posted July 22, 2012 Posted July 22, 2012 Far from my best shell, though a contender for my 'best dump break', I'm pretty happy that my 1lb whistle rockets can carry 4" ball shells to a good height, though I know this is certainly not exceptional performance for a whistle motor. I regret not taking a pre-fire photograph. The little motor on the shell looks comically disproportionate to me. Was 72 KP, 26 NaBenz, 3 Vaseline, 1 CuO 1 Fe2O3, with a core drilled out (gently by hand) 75mm deep (3") and 5.5mm dia, and obviously there was Ti there, only above the core, +5% 40-60 mesh. Coldfire, that seems to have some good power, so hopefully she'll carry a three no problem, though I've never put any significant payload on any of my nossleless BP ones. I agree with hot BP being important for good results (I mostly used willow/paulownia 12 hour milled), though still, the ISP is going to be pretty low. However I love them for the jump off the pad, and from the videos I've seen they can carry very substantial payloads. Lehighvallypyro, your video is removed? Dagabu, I have a question in relation to your whistle end burners. What nozzle geometry are you using/tried? Do you have a little 'core' to give it a kick start? I've been playing with 19mm whistle end burners a bit too, and tried drilling out a nozzle a range of different sizes until they just hit the mix, from quite large down incrementally to 3.5mm. In a violation of my expectations of a multitude of embarrassingly loud catos, they all flew, even though I use 4mm usually for BP rockets, the 3.5mm is quite consistent with my mix (half a dozen flights now). I'm going to have to try 3.3mm, then maybe 3mm to get the full experience I think
dagabu Posted July 22, 2012 Posted July 22, 2012 Seymour, I am using rocket tooling sketcher for the basic dimensions and then add a secondary divergence. Not really, I don't like the core in a whistle rocket. I end the nozzle with about 1/8" of a core left. On my 19mm rockets, the nipple is 4.75mm across and 6.35mm long with a divergence length of 8mm. -dag
coldfire Posted July 23, 2012 Posted July 23, 2012 (edited) Shell detonated upon lift-off.Maybe a little too fast a propellant! Edited July 23, 2012 by coldfire
dagabu Posted July 23, 2012 Posted July 23, 2012 Did you have a clay bulkhead that had a hole drilled in it? -dag
coldfire Posted July 23, 2012 Posted July 23, 2012 Dag, Sure did.Why? Did you have a clay bulkhead that had a hole drilled in it? -dag
dagabu Posted July 23, 2012 Posted July 23, 2012 (edited) Often times, the flame front makes it all the way to the bulkhead of which you have to drill past to get fire through. This lights the heading while the rocket burns off. Very typical of clay bulkheads.... The rocket clearly kept flying under thrust phase long after the heading popped. -dag Edited July 23, 2012 by dagabu
coldfire Posted July 25, 2012 Posted July 25, 2012 Dag,I had a short delay (1/2" star comp) at the very top.Do you still feel it was burn through or impact detonation? Often times, the flame front makes it all the way to the bulkhead of which you have to drill past to get fire through. This lights the heading while the rocket burns off. Very typical of clay bulkheads.... The rocket clearly kept flying under thrust phase long after the heading popped. -dag
dagabu Posted July 25, 2012 Posted July 25, 2012 Dag,I had a short delay (1/2" star comp) at the very top.Do you still feel it was burn through or impact detonation? No, I think it just burnt through the comp above the spindle and lit the heading. Add more star comp and no bulkhead on the next one and see how it flies. Count on 25mm for a 18mm rocket. -dag
Maserface Posted January 9, 2013 Posted January 9, 2013 Snow where I live means one thing, ROCKETS!! New proportions to my BP, not the best flight but progress towards my own "secret forumla". Also two rockets made from a bunch of thrown together BP from various projects. Enjoy ! http://i.imgur.com/9vG5a.jpghttp://www.youtube.com/watch?v=ufyuHwTYBEw&feature=youtube_gdata and the two random bastards, http://www.youtube.com/watch?v=7PK353WI9ZQ&feature=youtube_gdatahttp://www.youtube.com/watch?v=6zhiXHlDGmk&feature=youtube_gdata
psyco_1322 Posted January 9, 2013 Posted January 9, 2013 Snow where I live means one thing, ROCKETS!! New proportions to my BP, not the best flight but progress towards my own "secret forumla". Also two rockets made from a bunch of thrown together BP from various projects. Enjoy ! You videos are private, we can't view them.
Maserface Posted January 9, 2013 Posted January 9, 2013 You videos are private, we can't view them. My mistake! Videos are fixed and viewable now, thanks for the heads up!
psyco_1322 Posted January 9, 2013 Posted January 9, 2013 That last one looked like it was going into a spin, maybe you lost the stick? Are they exploding from a header or where the motors blowing after take off?
Maserface Posted January 9, 2013 Posted January 9, 2013 That last one looked like it was going into a spin, maybe you lost the stick? Are they exploding from a header or where the motors blowing after take off? The motor, the bp used in that one was a mixture between a hot 60/30/10 and a hot 75/15/10 that had been wet mixed and granulated together, my thoughts were that it just made too hot of lift and was causing the paper to bust
dagabu Posted May 18, 2013 Posted May 18, 2013 One of six test runs I did with the ACME Rocket Test Stand. 3/4" ID Endburner with 10% Ti in the fuel. These babies fly next weekend! http://youtu.be/S7LANQwTUf0
dagabu Posted May 18, 2013 Posted May 18, 2013 I never use clay or anything as a bulkhead, its always the delay. You saw the end of the delay burning off and giving sparks.
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