I tried to make my first cake with nine cardboard tubes used like small mortars.
I found the right burst charge and the right diameter of the stars, but .. only the first mortar was ignited!
At the bottom of every tube, just over the surface of the pressed bentonite, I created small holes where I passed
and connected the tubes thru small pieces of normal fuse.
Then I putted 10 grams of granulated hot BP and finally the cylindrical stars.
Well, none of the fuses were ignited: the first detonation do not ignite the following fuses.
I had the same issue when I make 2" shells placed inside bigger shells: the main detonation do not ignite the fuses connected to the
Anyone know how to ignite a fuse from a detonation (mortar or shells?)