Can I Re-Use an Igniter?

ksaves2

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As kids we just made thick napalm formulated to dry up.

With enough current, all kinds of goo burns well enough to light a Estes motor. We used a car battery and phone line.
Yeah, I remember those days from the 60's and early 70's. A car battery could light up everything but I used lamp zip cord as recommended by Vernon Estes.

Did an Estes Cobra in the 5th grade until a deployment "issue" caused it to splatter itself. Built a carbon copy as an old man and it flies great on three B6-4's in a small field and goes way up on C6's. Has to have a larger site with the bigger motors on the C6's.

I did a static line with small kevlar thread that is in one of the fins on the second build. Can't be seen and use an elastic "shock cord" inside the body tube attached to the static line that's replaceable. A lot of folks wonder why the rocket is coming in "upside down" but never broke a fin while flying it.

I have the second build Cobra downstairs and it's flyable. Just gotta get new 12V batteries for ignition. My old bats are dead and I have to get new and recycle the old. Out in the boondocks it's hard to find someplace for recycling old batteries. Plus I have to do a lot of domestic work as my lovely wife died 3 and a half years ago and I have guardianship of a mentally handicapped son. He's not a problem and can be taken to launches and hotels.
(Especially if they have swimming pools. Wife made sure he learned how to swim in spite of his handicap!)

Still I have a lot of work to do as a single widower parent so rocket time is more restricted than when my lovely wife was alive and I was working! Am retired now but a lot of work to be done around the house. Don't want to downsize just yet.

She died at 57.5 and I'm 65 now. Was only 62 when she died.

Kurt
 

brockrwood

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Nitrocellulose lacquer. I think the commercial stuff has an inhibitor in it but it usually doesn't make a difference as the pyrogen is what gets the job done. Just a protectant. One may purchase it from a Luthier supply company. (A place that sells supplies to people who hand make guitars.) Kurt
Ok! Got me 4 bottles of nail polish with the nitrocellulose in them. That’s gun cotton, right? I will try the silver one first as poor man’s pyrogen on DIY nichrome wire igniters.

If these don’t work on igniters, then I guess they will become bottles of rocket touch up paint.

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Steve Shannon

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Ok! Got me 4 bottles of nail polish with the nitrocellulose in them. That’s gun cotton, right? I will try the silver one first as poor man’s pyrogen on DIY nichrome wire igniters.

If these don’t work on igniters, then I guess they will become bottles of rocket touch up paint.

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Guncotton is one form of nitrocellulose. Not all nitrocellulose is guncotton. Nitrocellulose lacquer is not.
Guncotton is interesting because it has a lot of surface area in the fibers of the cotton. That makes it burn extremely quickly without transferring a lot of heat. That’s not what you want for an igniter. I’ve had a wad of guncotton set off in my palm without burning me. It just flashes.
Nitrocellulose lacquer should burn more slowly, thus transferring more heat. That’s better for use on an igniter. I would not light nitrocellulose lacquer in my palm.
 

ksaves2

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Ok! Got me 4 bottles of nail polish with the nitrocellulose in them. That’s gun cotton, right? I will try the silver one first as poor man’s pyrogen on DIY nichrome wire igniters.

If these don’t work on igniters, then I guess they will become bottles of rocket touch up paint.

It doesn't matter what you're using as a diluent. It just matters what your pyrogen is. Can't discuss formulas on the open forum but I've tried and made a lot of BP and APCP home made igniters and they all work. If you want to go there, you can do a search online or talk to folks at a Tripoli club for specifics on formulas. I will say a bare nichrome wire can light off a small BP motor anytime but to do a Research motor with a home made igniter takes a bit of work. It took me a winter to master that and it takes "stuff" that is harder and harder for the average person to get now to make the igniters. Get the "fixin's" and a little goes a long ways. Oh BTW I did home made ematches during the time we thought that "regular" people wouldn't be able to buy the commercial ones. Turns out I bought a sh**load of them before they were temporarily cut off but I experimented with making my own ematches anyways and it was a PITA. They worked but I never flew them. Had too many of the commercial ones lying around. I would have tried my homemade ones in a rocket if the supply was cut off. Kurt
 
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