[aprssig] Amazing resistors
scott at opentrac.org
Mon Sep 8 12:04:11 CDT 2014
I'm still looking for a reliable, reusable igniter design - if I'm going
to load 144 rockets into box launchers on the truck, I don't want to
have to replace all of those igniters after every firing!
On 9/8/2014 9:46 AM, Steve wrote:
> I tell my kids the stuff that I did as a kid would bring Homeland
> Security down on me today. I'M AMAZED I HAVE ALL MY FINGERS TODAY!
> Steve KB1CHU
> On 9/8/2014 11:59 AM, Curt, WE7U wrote:
>> On Sat, 6 Sep 2014, Al Wolfe wrote:
>>> In my mis-spent youth I was involved with many projects that
>>> required a squib, that is, an electrical igniter After a lot of
>>> trial and error we settled on some very thin steel wire. Basically,
>>> we found some picture hanging wire and discovered it was
>>> seven-stranded. Unwinding one of the strands gave us a single thin
>>> steel wire that was perfect for our projects. It would instantly
>>> explode with 120 volts applied and glow brightly at 12 volts before
>>> oxidizing and disintegrating.
>> Hah! In junior high or early high school I figured out that a
>> 30-gauge wire-wrap wire made a better igniter for my Century rocket
>> engines than the expensive igniter wires they sold... Saved money
>> -and- made every launch successful. I also wired my launcher to the
>> family's car battery instead (launched from the driveway), which also
>> increases reliability.
>> I claim to know nothing about blowing up resistors on purpose... Really.
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