To light multiple motors at once, such as in a cluster, you need
a "clip whip."
You can make clip-whips for two, three, or four motors, more if you
For each ignitor, you will need:
I use "match-point" or "tape" solder, which can be melted
in a match flame. (Heat the wire in the flame and slowly add solder by touching
it to the hot part so that it melts into the connection.) If you have a soldering
iron, then use what suits you.
- 2 copper micro-clips (with flat jaws; they grip ignitors better than
alligator clips); Radio Shack sells these in packets.
- A length of 20 or 22 gauge 2-conductor speaker wire. I use the kind
with one copper and one nickel lead in clear plastic insulation. The
exact length is not important, 10-18" is good; all whips in a set should
be about equal. Because this is a small gauge of wire, excessive length is
Split each end of each lead about 2" at each end, and strip about
1/2" of insulation off every wire end. Refer to the illustration above.
Crimp and solder a pair of micro-clips on one end of each set. Then
gather all the loose copper ends; twist and solder together. Do the
same with all the loose nickel ends.
On the pad, hook a pair of micro-clips to each ignitor. (If there are
more leads than ignitors, such as if you are firing a two-engine cluster
with a three-lead clip whip, just make sure the extra set does not short
out.) Hook your regular launch system clips to the free twisted, soldered
ends. Countdown and launch!
Submitted by Peter W. Clay (email@example.com)