Estes Sonic Igniters in Loki?

Discussion in 'Propulsion' started by LithosphereRocketry, Dec 17, 2017.

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  1. Jan 1, 2018 #31

    blackjack2564

    blackjack2564

    blackjack2564

    Crazy Jim's Gone Banana's

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    Well now I'm going to throw a monkey wrench into the mix....Lol
    I think you may have read [or I PM'd you] where I am working on a low current version for staging.

    I have some 40ga. nichrome, same as what used in low current E-matches. So far the proto's have been looking good. I solder the 40 ga. bridge wire and cast BKNO3 pyrogen around it...JUST LIKE motor starter version [32 ga. 12 volt]

    The results are looking up, BUT they light, a bit slower than I wish due to being cast in epoxy. Pure BKNO3 compressed is instant, but I have yet to figure how to compress a pellet around a wire. No easy task but I'm bound to 100% reliability before I'm happy.
    These are needed for my full scale Sparrow Arcus project, as I only get 1 shot at success.

    Maybe I'll do a thread of my process when I get further along, so others may use it.
    Should work with any pyro, the 40ga. is the secret sauce.
     
  2. Jan 1, 2018 #32

    dhbarr

    dhbarr

    dhbarr

    Amateur Professional

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    Plastisol instead of epoxy?
     
  3. Jan 1, 2018 #33

    blackjack2564

    blackjack2564

    blackjack2564

    Crazy Jim's Gone Banana's

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    Nope already tried a plastisol version with polyester resin.
    You have to heat cure it and that means a higher ignition temp.
    Not what we want. Takes several seconds to light...like 7-8.

    I'm getting close with the route we're on.
     
  4. Jan 1, 2018 #34

    Cl(VII)

    Cl(VII)

    Cl(VII)

    Chris Bender, Lab Rat TRF Sponsor

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    What about a tablet press like the one linked below? Maybe you could notch the punch, or center drill it, to allow for the wire.

    Tablet press: https://www.ebay.com/itm/US-6mm-Man...se-/253162288208?_trksid=p2141725.m3641.l6368
     
  5. Jan 1, 2018 #35

    BDB

    BDB

    BDB

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  6. Jan 13, 2018 #36

    byoungblood

    byoungblood

    byoungblood

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    I find that the Sonic igniters work quite well on smaller AT motors, I've used them on 24/40 reloads quite a few times in place of included Copperhead igniters or when I've had one that didn't light the 1st time on a First Fire.
     
  7. Jan 14, 2018 #37

    mrwalsh85

    mrwalsh85

    mrwalsh85

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    don't forget that hobby lobby sells sonic igniters, use your 40% off coupon wisely!
     

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