xBangergoosEx Posted November 21, 2011 Share Posted November 21, 2011 (edited) I am building my first 6" ball shell for NYE, and i need to know how long of a time fuse to put on it. I have the Jap time fuse that burns at about 3.5s/ft. Edit: I know the general rule of thumb to make the time fuse a second for every inch diameter of the shell (6sec fuse for a 6" shell, for example) but i would like everyone's input. Edited November 21, 2011 by xBangergoosEx Link to comment Share on other sites More sharing options...
Algenco Posted November 21, 2011 Share Posted November 21, 2011 (edited) 4.5 sec works for me Edited November 21, 2011 by Algenco Link to comment Share on other sites More sharing options...
Xtreme Pyro Posted November 21, 2011 Share Posted November 21, 2011 I agree with Al, 4.5 seconds is about right for a 6" shell, six seconds seems a bit over kill for a shell that size. Link to comment Share on other sites More sharing options...
Algenco Posted November 21, 2011 Share Posted November 21, 2011 it also depends on the stars, fast burning charcoal C6 for example can be broken lower than a willow with C6 and firefly I use 3.5 sec, I love it when charcoal stars burn out 100' above the ground oh sh-t, oh sh-t, ahhh Link to comment Share on other sites More sharing options...
Mumbles Posted November 21, 2011 Share Posted November 21, 2011 I agree with the others, 4.5sec is pretty good. I use about 1/4" of time fuse per inch of diameter. My fuse typically burned around 3 sec/inch, but I use that kind of regardless. I haven't gotten much fuse that burned overly fast though. Link to comment Share on other sites More sharing options...
Arthur Posted November 21, 2011 Share Posted November 21, 2011 http://www.pyroguide.com has many tables collated from the wider web giving some ideas for all the numbers for a selection of shell sizes. However it's your design so you eventually need it to be what you want!!A typical 6 would have 75g of lift and rise for 4 ish seconds, add more lift and break it hard and later then it rises to a greater height and you can sometimes have a better effect, I like this for willows and tiger tail which seems to fall for very long time so it needs the height to start from. Link to comment Share on other sites More sharing options...
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