Fast, Slow & Delayed fuse
Posted 03 August 2019 - 10:03 PM
I've made my fuse with 6 ply cotton string.
My KNO3 is soft & milky white & I worm it a bit to get rid of moisture within.
My AF C is from Indian species of Ziziphus tree which is shrub kind of plant
Sulphur as usual.
In 75/15/10/5(dex) I screen them 5-6 times grind them with mortar & pestle and again screen 2-3 times. Then wet with water.
This way I'm getting fuse equivalent to visco.
Now I intend to prepare fast As well as delayed fuse too.
Seniors please help me on this.
I do have Acetone, doctors spirit & methylated spirit in my stock also. Mentioning if those are handy on this project.
I understand seniors here don't care about 'Thanks in advance', they just do help.
Posted 05 August 2019 - 02:45 PM
"fast" visco fuses are typically made by wrapping granulated composition in spiral threads, taking advantage of the air pockets and surface area of the granules to increase the burn speed.
Posted 07 August 2019 - 11:49 AM
My intention was to know the process(if there is any) of making a fuse faster than a fuse made by dipping in 75/15/10/5(dex).
Sometimes back I saw a video of three fuses(not in 'quickmatch' form) burn rate comparison. First one was a delayed fuse. Second one was a normal black match & the third one burnt mutch faster.
Posted 05 November 2019 - 04:29 PM
I don't have access to quickmatch. Does anyone knows what's the exact width of a Chinese made quickmatch fuse?
Posted 27 November 2019 - 04:40 PM
The original reference was to Quickmatch, Blackmatch and Spollettes. All made with good fast BP and each yielding a different timing behaviour.
If you make other compounds then more speeds of burn are available, but I'm no expert there.
It takes making a machine to spin a cotton jacket round a steady stream of quality BP and call it Visco or if you add more covering it starts to be time fuse. Bickford was an early maker of this fuse and he used layers of cotton, paper and bitumen or tar to make the fuse more water resistant than the preceeding ones.
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