Jordan123 Posted October 11, 2017 Share Posted October 11, 2017 Hi everybody ! I make firework since few years actually and sucessfull many stuff.Actually i work about the stuff who made sound, i can build whistle insert but i have some problem for.... Hummer ! lol Hummer is really basic and i don't understand why i can make them and be sure than they work goood...I have build hummer who success but i make so hummer who is explod instead of make song.My hummer explod : then end plug go out or the paper tube broke I make hummer like this : BP same grade of milling than BP lift, rammed in paper tube with bentonite plug rammed by a hammerI have try many size of hole where the BP ignite need to escape to make this strange and really cool song and i have try to mke tube with a bigger resistance and i have consolidated my bentonite end plug with paper wrapped on the tube. So why my hummer explod some times ?.. Link to comment Share on other sites More sharing options...
OldMarine Posted October 11, 2017 Share Posted October 11, 2017 Your BP may be too hot. Link to comment Share on other sites More sharing options...
dagabu Posted October 11, 2017 Share Posted October 11, 2017 Agreed, add 5% charcoal. Link to comment Share on other sites More sharing options...
Col Posted October 12, 2017 Share Posted October 12, 2017 Sounds like you`re using one hole? try two holes, drilled tangently on opposite sides of the tube. Link to comment Share on other sites More sharing options...
Mumbles Posted October 12, 2017 Share Posted October 12, 2017 Do you use a jig or anything to make sure the vent hole is in the same place every time? Link to comment Share on other sites More sharing options...
Jordan123 Posted October 12, 2017 Author Share Posted October 12, 2017 Do you use a jig or anything to make sure the vent hole is in the same place every time?No,it's too expensive a metalic tools for this using but this can change what ? Sounds like you`re using one hole? try two holes, drilled tangently on opposite sides of the tube. Yes i use only one hole, i have already sucess with just one, which difference with 2 holes expect than that can resolve my problem of exploding ? Your BP may be too hot.So, i need a BP less milled ? It's possible i thought Agreed, add 5% charcoal. Ok, cool i try this tomorrow Link to comment Share on other sites More sharing options...
Col Posted October 12, 2017 Share Posted October 12, 2017 (edited) I prefer the sound of 2 vents. but it should also reduce the internal pressure.https://www.amateurpyro.com/forums/topic/6252-the-definitive-hummer-thread/page-2?do=findComment&comment=116564 My hummer tooling cost next to nothing, it doesnt have to be pretty to be effective Edited October 12, 2017 by Col 3 Link to comment Share on other sites More sharing options...
Jordan123 Posted October 16, 2017 Author Share Posted October 16, 2017 (edited) Ohh it's a really good tools easy to make probably, nice I try tomorrow 2 hole.But what a regular place of the hole change ? Edited October 16, 2017 by Jordan123 1 Link to comment Share on other sites More sharing options...
Col Posted October 17, 2017 Share Posted October 17, 2017 i put them in the middle of the tube for hummers. The red tube on the jig is the (2.5mm) drill guide for hummers, the other one (3mm) is for farfalle. I press a clay bulkhead in the empty tube and place it in the jig. Transfer the center line from the jig (the line with the arrow) onto the tube and drill the 1st hole using the red guide tube. The tube is rotated (180 degrees) so the line on the tube aligns with the center line on the other side of the hole in the jig (hidden behind the tube in the pic) then the 2nd hole is drilled in exactly the right place.Once you`ve figured out the ideal clay and fuel increments you can churn them out pretty quick. You can also make up empty predrilled cases for later use.. Link to comment Share on other sites More sharing options...
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