Quick Indoor Test - Bridgeless E-Match
Date: 2004-10-31
Description
Something I've been working on for a while is bridgeless e-matches. I think I've finally got a working composition of sufficient sensitivity, yet a good margin of safety.
I tried a Potassium Perchlorate based composition, but it was insufficiently sensitive to fire at all, it would bake-out the sulfur and crumble off the wires, but not ignite at 12 Volts.
The Potassium Nitrate based composition is the best trade-off between sensitivity and ignitability. It is very insensitive to shock and friction, which is a big safety feature compared to Barium Chlorate based commercial e-matches.
Comments
They work pretty well.
Very expedient to make, a T-rex wire stripper (Jaycar catalogue number TH1824) makes it quite trivial. After use, you can cut off the chared bit and re-do the end, and continue doing so until the wiring gets too short.
Most importantly, there is no bloody bridge wire to deal with!
Attachments
| title | type | size |
|---|---|---|
| Video | video/x-msvideo | 1.163 Mbytes |
| Close-Up | image/jpeg | 36.674 kbytes |
| Pre-Test Picture | image/jpeg | 95.833 kbytes |