Second stage ignition

Discussion in 'Competition Rocketry' started by JNUK, Aug 4, 2011.

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  1. Aug 4, 2011 #1

    JNUK

    JNUK

    JNUK

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    I was looking through photos from the last NARAM and found this model:

    [​IMG]

    If I am right, the second stage is ignited electronically. Could anyone explain how it is done on that type of models. I mean a type of the igniter, battery, control circuitry.

    Any relevant schematics, drawings pictures are welcomed.

    Thanks.
     
  2. Aug 5, 2011 #2

    gdiscenza

    gdiscenza

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    If that is for the internationals, the second stage is ignited through traditional gap staging.

    Trip had a similar model at the July NOVAAR meeting.

    G.D.
     
  3. Aug 5, 2011 #3

    kjohnson

    kjohnson

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    mox nix

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    On this particular model, the upper stage ignition was done using a Zitnan staging timer and a Quest Q2G2, which you can see poking out of the top of the booster.

    Most of the US team uses something other than traditional gap staging, be it a timer (in the big booster that gets dropped quickly) or a wick of vitamin T, or simultaneous ignition like a cluster.

    They CAN be done with traditional gap staging and that works great when using Estes motors. The euro motors aren't as reliable for that.

    kj
     
  4. Aug 6, 2011 #4

    JNUK

    JNUK

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    Thank you very much for you response

    What type of batteries is used to power the igniter?

    What is "a wick of vitamin T"?

    Are there any drawings/ photos of such models available on-line?
     
  5. Aug 15, 2011 #5

    bobkrech

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  6. Aug 21, 2011 #6

    JNUK

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  7. Sep 25, 2016 #7

    Rocketboy25

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    Is it possible to get more information about,non electronic, staging in FAI contest rocketry.... ?
    Regards from Germany ,
    Jochen
     
  8. Sep 25, 2016 #8

    kjohnson

    kjohnson

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    I've seen two non-electronic methods used.
    1- a tube with a little black powder at the top that connects the 2 motors, is triggered by the booster burning out.
    2- a small fuse in the upper stage motor lit by a 2nd igniter the same time as the booster is lit.

    Both take a lot of practice to get right.

    The gold medal winner for S1B at the WSMC used pretty much gap staging as deceived in the handbook of model rocketry, with a little BP on the booster to aid in upper stage ignition.

    kj
     
    Last edited: Sep 25, 2016
  9. May 30, 2018 #9

    jadeross

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    Good to your goal! I believe that it will be successful because you sounds enthusiastic in the things you do. I would love to see more photos of it!
     
  10. May 31, 2018 #10

    astronwolf

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    ...and some engineering. The internal components need to be vented properly so that the flame front from the burned-out booster doesn't just pop the upper stage off.
     

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