Public Domain Launch Controller
by Jerry Irvine

In order to advance access to the general public of adequately powered launch controllers, I am suggesting this plan.

The vast majority of igniters are operated on 6 volt launch systems. A limited number require higher voltages. This plan assumes a 6v power supply, but can very easily be modified to accept any other power supply, including a vastly superior, rechargeable Gel-Cell. However, this system uses a set of four "D" cells for power which is adequate for the vast majority of igniters in use today.

The launch button extension affords the ability to stand up while launching for better sighting and allows the freedom to detach yourself from the weight of your power supply unlike many other launch controllers.

One option which is recommended is a relay system going to a much stronger battery at the pad for clustering of high current igniters. This system is adequate to activate that and should give you years of service.

Total cost about US$20.

Homemade Launch Pad

Launch pads are cheap too:
3 wood 2 x 4 x 24 inches, 2 3/8" bolts, 4 inches long 4 3/8"- washers, 2 wing nuts, 1 1/8" x 36" piano wire launch rod, 1 1/4" x 36" piano wire launch rod, 1 1/2" x 60" stainless steel launch rod, 1 short ceramic figurine about 4 inches diameter.

Total cost about US$10.

Annual copyright notice: All of my posts are copyright 1996 Jerry Irvine and are not to be used for commercial purposes.

The above article(s) originally appeared in rec.models.rockets newsgroup. It's content has been reproduced here by kind permission from Jerry Irvine.

Questions? Comments? Suggestions?

Chris Krstanovic

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Last update on 7-Sept-96 - Copyright 1996, Chris Krstanovic (WR1F)