BengalFlair Posted January 2, 2014 Posted January 2, 2014 Terracotta pot fountain (locally known as Tubri) is a most popular firework of Bengal, a state of India, which is made with a type of BP, various Iron borings and filings .Bengal venerates her discovery of this fascinating Flower Pots (Tubris) by holding street to street competitions (with much smaller in size than these) where judges observe mainly height, spread out, brilliance and beauty. These fountains in the video contained 2.5-3.5 kg of composition but I've seen in villages such fountains made by local pyros for firework shows which contains 10-15 kg of compositions. If I get a chance I will show you that amazing firework.I have made lots of terracotta pot fountains but it was my first venture for the giant size especially. For safety I buried the pots under the ground. I am very curious about the existence of this kind of firework elsewhere in our planet except in Bengal. If you have any idea please do share. Everyone have a wonderful year ahead....Happy New Year 2014
Zumber Posted January 2, 2014 Posted January 2, 2014 http://m.youtube.com/watch?v=QihploPX9J8 http://m.youtube.com/watch?v=I5m-6JztVBg http://m.youtube.com/watch?v=3-oN5H6ZZF0 This is world's biggest fountain made in our village. 3 inch hole is drilled in the center of tamarind trees trunk and trunk is of 43 inch long.Composition contains BP plus cast iron borings.Video's are not clear, I will upload soon. This fountain takes height of about 60 feet.
BengalFlair Posted January 2, 2014 Author Posted January 2, 2014 @swapnilsutar Ok, but I have actually emphasized the use of terracotta pot for fountain casing.
psyco_1322 Posted January 3, 2014 Posted January 3, 2014 http://m.youtube.com/watch?v=QihploPX9J8 http://m.youtube.com/watch?v=I5m-6JztVBg http://m.youtube.com/watch?v=3-oN5H6ZZF0 This is world's biggest fountain made in our village.3 inch hole is drilled in the center of tamarind trees trunk and trunk is of 43 inch long.Composition contains BP plus cast iron borings.Video's are not clear, I will upload soon. This fountain takes height of about 60 feet. How are those nozzled? The height of those is amazing! I've seen some 3" ID fountains, they get pretty serious, but they didn't not have that high narrow spray. You guys say they are BP plus metal, is the bp a standard/hot 75:15:10 mix or something more charcoal heavy?
Zumber Posted January 3, 2014 Posted January 3, 2014 well whole 42/43" length of trunk is divided into three parts 13 inch for front nozzle side, 13 inch is reserved for composition and remaining for bottom side.front 13 inch side is hand rammed with special sticky soil (dry soil is used for ramming) with the aid of 3 inch 5 feet long wooden rod.After ramming front side with soil 3/4 inch (for high height) or sometimes 1 inch (for low height)hole is drilled throughout at the center of rammed side.Next composition is fed and then bottom side is rammed with same soil.Generally ratio of 700 gram of 30 to 40 mesh cast iron to 3 kg of Milled BP is used.what composition for BP to use is dependent upon diameter of hole drilled in rammed side, type of tamarind tree (male/female), strength of trunk and outer diameter of trunk.Softwood charcoal is highly preferred for BP and camphor powder is applied to iron borings with the aid of two palms of hand (I dont know why? but I think camphor powder is flammable so if applied on borings; borings could take fire easily).-Swap
psyco_1322 Posted January 4, 2014 Posted January 4, 2014 If I read that right, the rammed nozzle section is only 3/4-1" thick? How does that hold the pressure?
Zumber Posted January 4, 2014 Posted January 4, 2014 If I read that right, the rammed nozzle section is only 3/4-1" thick? I just cant get what you are trying to say.....rammed section is 13 inch long to which 3/4-1" hole is drilled parallely at center throughout 13 inch.
dan999ification Posted January 4, 2014 Posted January 4, 2014 Nice to see something different ben are the pots nozzled or do they rely on burning surface for pressure? A third I'd is the standard fountain nozzle dimension, but I'm suprised a throat that long does not cause over pressure.The length of throat explains the high narrow spray Is it possible that the camphor is added to the iron to stop it degrading ? Dan.
psyco_1322 Posted January 5, 2014 Posted January 5, 2014 I just cant get what you are trying to say.....rammed section is 13 inch long to which 3/4-1" hole is drilled parallely at center throughout 13 inch.Ok, I understand now. That is crazy that the nozzle is 13" long, I'd also think that would cause issues. So 13" of nozzle, then 13" of fuel, and another 13" of plug. Truly some amazing fountains.
Zumber Posted January 5, 2014 Posted January 5, 2014 Thanks psyco...I will upload another clear video soon....
BengalFlair Posted January 5, 2014 Author Posted January 5, 2014 what composition for BP to use is dependent upon diameter of hole drilled in rammed side, type of tamarind tree (male/female), strength of trunk and outer diameter of trunk. Male /female tamarind! Never seen or heard of it!Only dioecious plants can be considered as male or female but tamarinds are hermaphrodite plants which have bisexual flowers. are the pots nozzled or do they rely on burning surface for pressure? Is it possible that the camphor is added to the iron to stop it degrading ? I think you meant “cored “as the pots themselves are nozzled. No, they don’t have core, they are just like end burners and the huge surface area of the composition helps to create that pressure.Due to having thin walls with respect to their size (average ½”) pyros have to be experienced and wise to adjust the pressure, getting maximum height and spread-out without destruction of the pots.We usually use un-milled bp with a ratio of kno3-70%, s-17%, and c-13% and +30%-50% iron. Some time adding of a little milled bp helps to adjust the pressure. Camphor never prevents degradation of iron. It is used mainly for increasing the flame while brightening it and the sparking materials of the composition as well. It also makes a peculiar smell to the surroundings which is different from pure bp.
MWJ Posted January 13, 2014 Posted January 13, 2014 (edited) BengalFlair, Boy I just went to your youtube channel and WOW! those firework videos are great! Nice job! Edited January 13, 2014 by MWJ
BengalFlair Posted January 13, 2014 Author Posted January 13, 2014 Thank you I suggest you to get a youtube channel yourself too and upload your videos that we can watch it easily.
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